Compared with cemented carbide, high speed steel has low hardness and good toughness.
It is suitable for making broach and hob.
High speed steel cutting tools are widely used in cutting.
Today, let’s learn about their brand and application.
（1） Composition and properties of domestic high speed steel cutting tools
The composition, performance and application scope of domestic high-speed steel tool materials are shown in table 2-6, and the brand and comparison of domestic and foreign high-speed steel tools are shown in table 2-7.
Table 2-6 classification, grade, performance and application of domestic high speed steel
| ID | Category | Steel grade | WC（%） | Hardness (HRC) | Flexural strength / GPA | Impact toughness / (kJ / m2) | Hardness at 600 ℃ (HRC) | Service performance | Scope of application |
| 1 | General high speed steel | W18Cr4V（W18） | 0.70~0.80 | 63-66 | 3.0~3.4 | 0.2~0.3 | 48.5 | W-series universal high-speed steel has high hardness, thermal hardness and high-temperature hardness. It has a wide fire range, but it is not easy to overheat and easy to grind (it can be grinded with ordinary grinding wheel). The disadvantage is low thermoplastic and poor toughness. The steel used to be the largest, but its use decreased after the 1970s. | It is mainly used to make turning tools, drill bits, milling cutters, reamers and other tools for high-speed cutting. It is also used as die, tap, reamer, wire drawing die, saw blade, etc., but it is not suitable to make tools by hot forming method. |
| 2 | General high speed steel | W6Mo5Cr4V2（M2） | 0.80~0.90 | 63-66 | 3.5~4.0 | 0.3~0.4 | 47~48 | W-Mo general-purpose high-speed steel is the most widely used high-speed steel grade (i.e. m2) in various countries. It has high hardness, thermal hardness and high-temperature hardness, good thermoplastic, excellent strength and toughness; The disadvantage is that the steel is sensitive to overheating and decarburization, and the heat resistance is slightly lower than W18Cr4V | It is used to make cutting tools and general cutting tools that require good wear resistance and toughness and bear large impact force, such as gear shaper cutter, bevel gear planer, milling cutter, turning tool, tap, drill bit, etc |
| 3 | General high speed steel | W14Cr4VMnXt | 0.85~0.95 | 64-66 | ~4.0 | ~0.31 | 50.5 | Processing general steel and cast iron, can manufacture all kinds of cutting tools | Equivalent to W18Cr4V, but improved thermoplastic |
| 4 | General high speed steel | W9Mo3Cr4V | 0.77~0.87 | 63~66 | 4.0-4.5 | 0.35-0.4 | The new W-Mo general-purpose high-speed steel developed in China has the same service properties as W18Cr4V (T1) and W6Mo5Cr4V2 (M2), good heat resistance, thermoplastic and heat treatment properties, better comprehensive process properties than T1 and M2 and lower cost | General high speed steel | |
| 5 | High performance high speed steel – high carbon and high vanadium | W12Cr4V4Mo（EV4） | 1.20~1.40 | 66-67 | ~3.2 | ~0.1 | 52 | It is used to manufacture cutting tools with high wear resistance | High performance high speed steel – high carbon and high vanadium |
| 6 | High performance high speed steel high carbon and high vanadium | W6Mo5Cr4V3（M3） | 1.00-1.10 | 65-67 | ~3.2 | ~0.25 | 51.7 | High carbon and high vanadium high-speed steel has higher wear resistance than W6Mo5Cr4V2 due to its high vanadium content, low strength and toughness and high decarburization sensitivity, so it has high hardness and wear resistance and higher heat resistance than general-purpose high-speed steel. Grinding with single crystal corundum sand | It is used to make tools and general tools requiring special wear resistance, such as broach, hob, thread comb, turning tool, planer, tap, drill bit, etc. Due to the poor grindability of steel, making complex cutting tools requires special grinding wheels |
| 7 | High performance high speed steel – high carbon and high vanadium | W9Cr4V5 | 1.40~1.50 | 63~66 | ~3.2 | ~0.25 | 51 | It is used to manufacture cutting tools with high wear resistance | Due to the high vanadium content, the hardness and wear resistance are high, but the strength and toughness are low, and the heat resistance is higher than that of general-purpose high-speed steel. The grindability is poor, so it needs to be grinded with single crystal corundum sand |
| 8 | High performance high speed steel containing cobalt | W6Mo5Cr4V2C（M36） | 0.80~0.90 | 66~68 | ~3.0 | ~0.3 | 54 | High carbon W-Mo general-purpose high-speed steel, due to the increase of carbon content, the surface hardness after quenching is also improved, and the high-temperature hardness, wear resistance and heat resistance are higher than W6Mo5Cr4V2, but the strength and toughness are reduced and should not be impacted | High performance high speed steel containing cobalt |
| 9 | High performance high speed steel – high carbon, high vanadium and cobalt | W12Cr4V5Co5（T15） | 1.50~1.60 | 66~68 | ~3.0 | ~0.25 | 54 | W series high vanadium cobalt high speed steel has high hardness, especially ultra-high wear resistance, but poor grindability, so it needs to be grinded with single crystal corundum grinding wheel. It combines the advantages of good wear resistance of vanadium containing steel and high heat resistance of cobalt containing steel | High performance high speed steel – high carbon, high vanadium and cobalt |
| 10 | High performance high speed steel – high carbon, high vanadium and cobalt | W9Cr4V5Co3 | 1.40~1.50 | It is used to process high-temperature alloy, stainless steel, etc., but it is not suitable to manufacture complex cutting tools because it is difficult to grind | High performance high speed steel – high carbon, high vanadium and cobalt | ||||
| 11 | High performance high speed steel – cobalt containing superhard type | W2Mo9Cr4VCo8（M41） | 1.05~1.15 | 67~69 | 2.7~3.8 | 0.2~0.3 | 55 | W-Mo series high carbon cobalt containing superhard steel, equivalent to M42 in the United States, is a kind of superhard high-speed steel with the largest consumption. It has high thermal hardness and high-temperature hardness, easy grinding, but poor toughness. It can be said that it has good comprehensive performance, but the price is expensive | It is used to make all kinds of complex high-precision tools, such as precision broach, forming milling cutter, special turning tool, drill bit and all kinds of high hardness tools. It can be used to cut difficult machining materials such as titanium alloy, superalloy, ultra-high strength steel and so on |
| 12 | High performance high speed steel – cobalt containing superhard type | W7Mo4Cr4V2Co5（M41） | 1.05~1.15 | 67~69 | 2.5~3.0 | 0.2~0.3 | 54 | It is used to process difficult to process materials such as high-strength steel, superalloy and titanium alloy, and can manufacture all kinds of cutting tools | The grindability is inferior to w2mo9cr4vco8 |
| 13 | High performance high speed steel – cobalt containing superhard type | W9Mo3Cr4V3Co10 | 1.20~1.30 | 66~69 | ~2.4 | 0.2~0.3 | 54 | It is used to process difficult to process materials such as high-strength steel, superalloy and titanium alloy, and can manufacture all kinds of cutting tools | It has the same properties as w12mo9cr4vco8, but it has low strength and toughness and poor grindability |
| 14 | High performance high speed steel – cobalt containing superhard type | W12Cr4V3Mo3Co5Si | 1.20~1.35 | 67~69 | 2.43.3 | 0.1~0.2 | 54 | It is used to process difficult to process materials such as high-strength steel, superalloy and titanium alloy, and can manufacture all kinds of cutting tools | It is a low cobalt superhard high speed steel with similar properties and poor grindability to high cobalt high speed steel |
| 15 | High performance high speed steel – cobalt free superhard type | W6Mo5Cr4V2A1（M2-A1） | 1.05~1.20 | 67~69 | 2.9~3.9 | 0.2-0.3 | 55 | It can replace high cobalt high speed steel to process difficult machining materials | The performance is similar to that of w2mo9cr4vco8, but the grindability is slightly poor and the overheating sensitivity is slightly higher. cheapness |
| 16 | Cobalt free superhard steel | W6Mo5Cr4V5SiNbA1 | 1.55~1.65 | 66~68 | 3.6~3.9 | 0.2~0.3 | 51 | It can replace high cobalt high speed steel to process difficult machining materials | High wear resistance, high heat resistance and poor grindability |
| 17 | High performance high speed steel – cobalt free superhard type | W10Mo4Cr4V3Al | 1.30~1.45 | 67~69 | 3.1~3.5 | 0.2~0.3 | 54 | It can replace high cobalt high speed steel to process difficult machining materials | High wear resistance, high heat resistance and poor grindability |
Table 2-7 comparison of domestic and foreign high speed steel grades
| China | Japan | the republic of korea | U.S.A | UK | Germany | France | International Organization for Standardization |
| GB | JIS | KS | AISISAE | BS BS/EN | DINDIN/EN | NF NF/EN | ISO |
| W18Cr4W | SKH2 | SKH2 | TI | HS18-0-1 | |||
| W18Cr4VCo5 | SKH3 | SKH3 | T4 | ||||
| SKH4 | SKH4 | T5 | |||||
| W12Cr4V5Co5 | SKH10 | SKH10 | T15 | BM2 | S6/5/2 | Z85WDCV | |
| W6Mo5Cr4V2 | SKH51 | SKH51 | M2 | HS6-5-2 | |||
| W6Mo5Cr4V3 | SKH52 | SKH52 | M3-1 | HS6-6-2 | |||
| CW6Mo5Cr4V3 | SKH53 | SKH53 | M3-2 | HS6-5-3 | |||
| SKH54 | SKH54 | M4 | BM35 | S6/5/2/5 | 6-5-2-5 | HS6-5-4 | |
| W6Mo5Cr4V2Co5 | SKH55 | SKH55 | M35 | HS6-5-2-5 | |||
| W6Mo5Cr4V2Co8 | SKH56 | SKH56 | M36 | ||||
| SKH57 | SKH57 | S2/9/2 | HS10-4-3-10 | ||||
| W2Mo9Cr4V2 | SKH58 | SKH58 | M7 | HS2-9-2 | |||
| SKH59 | SKH59 | M42 | HS2-9-1-8 | ||||
The grades and applications of high-speed steel of HEC are shown in table 2-8, table 2-9 and table 2-10.
Table 2-8 grade and application of HEC high speed steel
|
Ordinary high speed steel |
||||||||
|
Hezhi steel |
Chemical composition (mass fraction,%) |
|||||||
|
C |
W |
Mo |
Cr |
V |
Co |
other |
||
|
HYM2 |
0.86 |
6.00 |
4.80 |
4.00 |
1.85 |
|||
|
HYM2E |
0.90 |
6.20 |
4.80 |
4.00 |
1.90 |
|||
|
HYW9 |
0.83 |
8.85 |
3.00 |
4.10 |
1.45 |
|||
|
HYW6A |
0.86 |
6.00 |
3.00 |
4.20 |
1.80 |
|||
|
HYW18 |
0.78 |
18.00 |
<030 |
4.10 |
1.10 |
|||
|
HYM7 |
1.00 |
1.90 |
8.70 |
3.85 |
2.00 |
|||
|
Hezhi steel |
Similar steel grade |
|||||||
|
GB |
ISO |
ASTM |
JIS |
BOHLER |
ERASTEEL |
|||
|
HYM2 |
W6Mo5Cr4V2 |
HS6-5-2 |
M2 |
SKH51 |
s600 |
EM2 |
||
|
HYM2E |
CW6Mo5Cr4V2 |
HS6-5-2C |
M2 (high C) |
S600 |
EM2 |
|||
|
HYW9 |
W9Mo3Cr4V |
|||||||
|
HYW6A |
||||||||
|
HYW18 |
W18Cr4V |
HS18-0-1 |
TI |
SKH2 |
5200 |
ETI |
||
|
HYM7 |
W2Mo9Cr4V2 |
HS2-9-2 |
M7 |
SKH5S |
S400 |
EM7 |
||
|
Hezhi steel |
Quenching and tempering hardness (HBW) |
Annealing hardness (HBW) |
application |
|||||
|
HYM2 |
>255 |
64 |
It is suitable for manufacturing various types of general tools, as well as large-scale and thermoplastic forming tools |
|||||
|
HYM2E |
≥255 |
<64 |
Fried dough twist drill, tap, milling cutter, reamer, broach |
|||||
|
HYW9 |
≥255 |
<64 |
It is widely used. It is not only suitable for manufacturing various types of general tools, but also for manufacturing large-scale and thermoplastic forming tools |
|||||
|
HYW6A |
≥255 |
64 |
It can replace w9 to produce taper shank drills, taps, Broaches and other cutting tools. It can also produce molds and sliding blades of air conditioning compressors with high wear resistance |
|||||
|
HYW18 |
≥255 |
<63 |
It is widely used for various cutting tools, such as turning tool, planer, milling cutter, broach, reamer, drill bit, gear shaper cutter, tap, die, etc. it can also be used to make wear-resistant parts at high temperature, such as high-temperature bearing, high-temperature spring, etc. sometimes it is also used to make cold working die |
|||||
Table 2-9 grade and application of high performance high speed steel in Hecheng smelter
|
High performance high speed steel |
||||||||
|
Heye steel grade |
Chemical composition (mass fraction,%) |
|||||||
|
C |
Mo |
Cr |
V |
Co |
other |
|||
|
HYM42 |
1.1 |
1.55 |
93 |
3.85 |
1.15 |
8 |
||
|
HYM35 |
0.93 |
6.2 |
4.85 |
4.1 |
1.9 |
4.8 |
||
|
HYT42 |
1.29 |
9.5 |
3.5 |
4 |
3.2 |
9.8 |
||
|
HYT15 |
1.55 |
12.4 |
≤1.0 |
4.25 |
4.9 |
4.8 |
||
|
HYC8 |
1.05 |
5 |
6 |
4 |
1.6 |
7.8 |
||
|
HYM2A1 |
1.1 |
6.1 |
4.8 |
4.1 |
1.85 |
A1:1.00 |
||
|
HYM3-1 |
1.2 |
6.2 |
4.9 |
4 |
2.9 |
|||
|
HYM3-2 |
1.3 |
6.2 |
4.9 |
4 |
2.9 |
|||
|
HYM4 |
1.3 |
5.7 |
4.7 |
4.2 |
4 |
|||
|
Heye steel grade |
Similar steel grade |
|||||||
|
GB |
ISO |
ASTM |
JIS |
BOHLER |
ERASTEEL |
|||
|
HYM42 |
W2Mo9Cr4VCo8 |
HS2-9-1-8 |
M42 |
SKH59 |
S500 |
EM42 |
||
|
HYM35 |
W6Mo5Cr4V2Co5 |
HS6-5-2-5 |
M35 |
SKH55 |
S705 |
EM35 |
||
|
HYT42 |
W10Mo4Cr4V3Co10 |
HS10-4-3-10 |
SKH57 |
S700 |
WKE42 |
|||
|
HYT15 |
W12Cr4V5Co5 |
HS12-1-5-5 |
T15 |
SKH10 |
||||
|
HYC8 |
HS5-6-2-8 |
C8 |
||||||
|
HYM2A1 |
W6Mo5Cr4V2Al |
S620 |
||||||
|
HYM3-1 |
W6Mo5Cr4V3 |
HS6-5-3 |
M3（Class1） |
SKH52 |
EM3:1 |
|||
|
HYM3-2 |
CW6Mo5Cr4V3 |
HS6-5-3C |
M3（Class2） |
SKH53 |
S607 |
EM3:2 |
||
|
HYM4 |
W6Mo5Cr4V4 |
HS6-5-4 |
M4 |
SKH54 |
||||
|
Hezhi steel |
Tempering hardness (HRC) |
Annealing hardness (HBW) |
application |
Hezhi steel |
Tempering hardness (HRC) |
Annealing hardness (HBW) |
application |
|
|
HYM42 |
≥66 |
≤269 |
It is suitable for manufacturing all kinds of high-precision and complex cutting tools and all kinds of cutting tools for difficult to process materials, such as milling cutter, hob, gear shaper cutter, broach, tap and special drill bit |
HYM42 |
≥66 |
≤269 |
It is suitable for manufacturing all kinds of high-precision and complex cutting tools and all kinds of cutting tools for difficult to process materials, such as milling cutter, hob, gear shaper cutter, broach, tap and special drill bit |
|
|
HYM35 |
≥64 |
≤269 |
It is suitable for all kinds of cutting tools, such as drill bit, tap, milling cutter, broach and hob |
HYM35 |
≥64 |
≤269 |
It is suitable for all kinds of cutting tools, such as drill bit, tap, milling cutter, broach and hob |
|
|
HYT42 |
≥66 |
≤285 |
It is suitable for manufacturing cutting tools such as end mills, hobs, broaches, turning tools and planers for heavy and continuous cutting |
HYT42 |
≥66 |
≤285 |
It is suitable for manufacturing cutting tools such as end mills, hobs, broaches, turning tools and planers for heavy and continuous cutting |
|
|
HYT15 |
≥65 |
≤277 |
It is suitable for manufacturing cutting tools such as drilling tools, thread tools, turning tools, milling tools, forming tools, hobs and scraper blades. It is used to process medium and high strength steel, cold rolled steel, cast alloy steel, low alloy super strength and other difficult to process materials |
HYT15 |
≥65 |
≤277 |
It is suitable for manufacturing cutting tools such as drilling tools, thread tools, turning tools, milling tools, forming tools, hobs and scraper blades. It is used to process medium and high strength steel, cold rolled steel, cast alloy steel, low alloy super strength and other difficult to process materials |
|
|
HYC8 |
≥63 |
≤269 |
It is suitable for manufacturing all kinds of high-precision and complex cutting tools and all kinds of cutting tools for machining difficult materials, such as milling cutter, hob, gear shaper cutter, broach, tap and special drill bit |
HYC8 |
≥63 |
≤269 |
It is suitable for manufacturing all kinds of high-precision and complex cutting tools and all kinds of cutting tools for machining difficult materials, such as milling cutter, hob, gear shaper cutter, broach, tap and special drill bit |
|
|
HYM2A1 |
≥65 |
≤269 |
It is suitable for manufacturing cutting tools such as end mills, hobs, broaches, turning tools and planers for heavy and continuous cutting. The dry hym2a1 tool has excellent cutting performance and low price. It has become an excellent material to replace M42 in manufacturing tools with high thermal hardness requirements in China |
HYM2A1 |
≥65 |
≤269 |
It is suitable for manufacturing cutting tools such as end mills, hobs, broaches, turning tools and planers for heavy and continuous cutting. The dry hym2a1 tool has excellent cutting performance and low price. It has become an excellent material to replace M42 in manufacturing tools with high thermal hardness requirements in China |
|
|
HYM3-1 |
≥65 |
<262 |
It is suitable for manufacturing small size cutting tools with high wear resistance and toughness |
HYM3-1 |
≥65 |
<262 |
It is suitable for manufacturing small size cutting tools with high wear resistance and toughness |
|
|
HYM3-2 |
≥65 |
≤262 |
It is suitable for manufacturing cutting tools with high wear resistance and toughness requirements, such as planer, tap, cutter, etc |
HYM3-2 |
≥65 |
≤262 |
It is suitable for manufacturing cutting tools with high wear resistance and toughness requirements, such as planer, tap, cutter, etc |
|
|
HYM4 |
≥65 |
≤269 |
It is generally used to manufacture various simple cutting tools, such as broach, turning tool, etc. it is suitable for machining medium and high strength steel, superalloy and other difficult cutting materials, and is not suitable for manufacturing high-precision complex cutting tools |
HYM4 |
≥65 |
≤269 |
It is generally used to manufacture various simple cutting tools, such as broach, turning tool, etc. it is suitable for machining medium and high strength steel, superalloy and other difficult cutting materials, and is not suitable for manufacturing high-precision complex cutting tools |
|
Table 2-10 grade and application of powder metallurgy high speed steel in Hecheng smelter
|
Powder metallurgy high speed steel |
|||||||
|
Heye steel grade |
Chemical composition (mass fraction,%) |
||||||
|
W |
Mo |
Cr |
V |
Co |
other |
||
|
AHPM3 |
13 |
62 |
5 |
4 |
3 |
||
|
AHPM4 |
1.35 |
55 |
4.7 |
42 |
4 |
||
|
AHPT15 |
1.55 |
12 |
≤10 |
4 |
4.9 |
5 |
|
|
AHPT15M |
1.6 |
10 |
2.2 |
4.7 |
4.8 |
8 |
|
|
AHP30 |
13 |
6.5 |
4.9 |
4 |
29 |
83 |
|
|
Heye steel grade |
Similar steel grade |
||||||
|
GB |
ISO |
ASTM |
JIS |
BOHLER |
ERASTEEL |
||
|
AHPM3 |
W6Mo5Cr4V3 |
HS6-5-3C |
M3（Class2） |
SKH53 |
S790 |
ASP2023 |
|
|
AHPM4 |
W6Mo5Cr4V4 |
HS6-5-4 |
M4 |
SKH54 |
S690 |
EM4 |
|
|
AHPT15 |
W12Cr4V5Co5 |
T15 |
ASP2015 |
||||
|
AHPT15M |
S390 |
ASP2052 |
|||||
|
AHP30 |
W6Mo5Cr4V3Co8 |
HS6-5-3-8 |
S590 |
ASP2030 |
|||
（2） Typical product introduction
1. New materials and new coating technology used by aoketai steel
（1）A C150P：
CVD coating (as shown in Fig. 2-5), which is the finishing material of steel parts and is suitable for semi finishing.
It adopts a new gradient cobalt rich matrix with superior wear resistance, realizing long service life and stability in continuous, light intermittent processing.
Fig. 2-5 AC150p
（2）AC250P：
CVD coating (as shown in Fig. 2-6), medium processing and semi finishing materials of steel parts, strength and toughness of cobalt rich matrix, perfect combination of controllable MT Ti CN grain structure and smooth α-Al2O3, superior wear resistance and collapse resistance, the first choice for steel parts processing.
Fig. 2-6 AC250p
（3）AC350P：
CVD coating (as shown in Fig. 2-7) is suitable for rough machining of steel parts.
The unique coating process improves the coating structure, high bonding strength and superior mechanical properties.
Special processes are used to treat the surface and edge coatings, giving the brand with super cutting edge strength and better wear resistance.
Fig. 2-7 AC350P
2. Material grade and application of Walter high speed steel
Four groups of high-speed steel are used for Walter Titex tool, as shown in table 2-11, and the material and alloy composition of Walter high-speed steel are shown in table 2-12.
Table 2-11 four groups of high speed steel used for Walter Titex tool
| HSS | General purpose high speed steel (fried dough twist drill, reamer, spot facer, partial reamer, center drill and step drill) |
| HSS-E | High speed steel containing 5% cobalt is used to meet the higher cutting load, especially the higher thermal load (high-efficiency fried dough twist drill and partial reamer). |
| HSS-E Co8 | High speed steel containing 8% cobalt has the highest heat resistance, corresponding to American grade M 42 (non-standard tool). |
| HSS-PM | Powder metallurgy high speed steel has very high alloy content.Advantages: high purity, uniform structure, strong wear resistance and good heat resistance (non-standard tool). |
Table 2-12 material and alloy composition of Walter high speed steel
|
Material number |
abbreviation |
Old standard code |
AISIASTM |
AFNOR |
B.S. |
UNI |
Mass fraction of alloy (%) |
||||||
|
C |
Cr |
Mo |
V |
Co |
|||||||||
|
HSS |
13343 |
S6-5-2 |
DMo5 |
M2 |
BM2 |
HS6-5-2 |
0.82 |
4.0 |
65 |
5.0 |
2.0 |
||
|
HSS-E |
1.3243 |
S6-5-2-5 |
EMo5Co5 |
M35 |
6.5.25 |
HS6-5-2-5 |
0.82 |
4.5 |
6.0 |
5.0 |
2.0 |
5.0 |
|
|
HSS-ECo8 |
13247 |
S2-10-1-8 |
M42 |
BM42 |
HS2-9-1-8 |
1.08 |
4.0 |
1.5 |
95 |
1.2 |
8.25 |
||
|
HSS-PM |
Material order No. ASP |
||||||||||||
Surface treatment can improve the use efficiency of cutting tools.
The steam treatment of high-speed steel cutting tools is shown in table 2-13, and the nitriding treatment of high-speed steel cutting tools is shown in table 2-14.
Table 2-13 steam treatment of high speed steel cutting tools
| Workmanship | Dry steam, Fe3O4 520-580 ℃ |
| Effect | Attached Fe3O4, oxide layer, about 0.003-0.010mm thick |
| Characteristic | -Reduce the tendency of cold welding between materials-First, the surface hardness is improved and the wear resistance is improved-Improved corrosion resistance-FeO crystal makes the lubricant adhere better and improves the lubrication performance-Reduce grinding stress |
Table 2-14 nitriding treatment of high speed steel cutting tools
| Workmanship | Treated in nitrogen, 520-570 ℃; |
| Effect | Increase the nitrogen content of the surface, sometimes including carbon content; |
| Characteristic | Reduce the tendency of cold welding between materials and the generation of chip buildup;The hardness is improved, and thus the wear resistance is improved. |
The PVD physical coating treatment technology is used on Walter Titex high-speed steel and cemented carbide tools, which is completed at the process temperature below 600 ℃, so it will not cause the change of basic materials.
Compared with the tool material itself, the hard material coating has higher hardness and stronger wear resistance, as shown in table 2-15.
Hard coating method table 15-2
| Surface preparation / coating | Method / coating | characteristic | Tool example |
| Uncoated | No processing |  | |
| Steam treatment | Steam treatment | High speed steel steam treatment |  |
| Blade belt steam treatment | Steam treatment | Steam treatment of high speed steel blade belt |  |
| TiN | Tin coating | Universal coating |  |
| TIP | Tin head coating | Special coating, best chip removal performance |  |
| TFL | Tinal coating | High efficiency coating, wide application range |  |
| TFT | Tinal top coating | High efficiency coating, especially small friction coefficient |  |
| TFP | Tinal head coating | High efficiency coating, perfect chip removal performance |  |
| TML | Tinal micro bit coating | Special coating for small drill bits with very low friction coefficient |  |
| XPL | A1crn coating | High efficiency coating with the highest wear resistance |  |
| DPL | Double coating | High efficiency coating with the highest wear resistance |  |
| DPP | Head double coating | High efficiency coating with the highest wear resistance |  |
| AML | AITiN micro bit coating | Special coating for small drill bits with very low friction coefficient |  |
| AMP | AlTiN micro bit head coating | Special coating for small drill bits with very low friction coefficient |  |
