Grade selection principle

After selecting various types of alloys for different processed materials, the brand should also be selected according to the processing parameters. Generally speaking, the surface quality of the workpiece should be considered for finishing processing, that is, surface accuracy. During processing, the cutting speed is fast, the depth of cutting is small, the amount of cutting is small, the vibration is small, and the impact is small. It is required that the alloy has good wear resistance, high hardness, followed by strength and toughness, so the alloy with fine grain, high titanium content, and low cobalt content should be selected; The semi finishing wear resistance and strength toughness are moderate, and the alloy with medium particle tungsten carbide, medium Ti content and medium Co content is selected; Rough machining has large cutting depth, large cutting amount, slow cutting speed, large vibration and large impact, so it is emphasized that the impact resistance of the blade is better, followed by the wear resistance. Coarse grained tungsten carbide, alloys with low Ti content and high Co content should be selected.

The grade is designed according to the cutting requirements. The machinability of different processed materials is different. Carbon steel has good plasticity and toughness, and the chips are not easy to break. The chips are discharged from the rake face, causing strong crater wear on the rake face. Therefore, for the cutting of steel, we should choose cemented carbide that resists crater wear. Tic and TAC (NBC) have good anti crater wear effect, so the brand of cutting steel contains tic, TAC (NBC) generally does not choose the brand containing TAC (NBC) for cutting carbon steel due to the increased cost. TAC (NBC) can not only resist crescent wear, but also improve the thermal shock resistance of the alloy. Therefore, the alloy containing TAC (NBC) has good high temperature performance. When machining M-type alloy, due to serious work hardening, large cutting resistance and high cutting temperature, the alloy containing TAC (NBC) should be selected; For brittle materials such as cast iron, the chips are in the form of crumbs or powder, and the wear of the rake face is small, mainly the wear of the rear face. The machining characteristics of brittle materials are that the cutting force and cutting heat are concentrated near the cutting edge, so that the load on the cutting edge is very heavy, which is prone to wear and edge collapse. Generally, tungsten cobalt alloys are selected. Because the alloys containing tic are relatively brittle, W-Co alloys are stronger and more ductile than w-co-ti alloys.

Carbide grade

Grain Size

Binder

Binder Content

Density

Dureza

Transverse

Pressure

Fracture

Special Properties/

% w/w

g/cm

HV30

HRA

Rupture**

Resistance**

Toughness***

Formulários

N/mm2

N/mm2

N/mm2. m1/2

AU8

ultrafine

Cobalto

8.0 

14.5 

 1860  

 93.2 

4100

6300

8.5

ideal for high performance milling

AU12

12.0 

14.0 

1680

92.2

4400

6000

9.5

AS3

 submicron 

 Cobalto 

3.3 

15.2 

2000

94.0 

3400

6500

7.8 

for extreme wear applications

AS6

6.0 

14.8 

1820

93.1 

3800

6400

8.5 

our main grade for metal cutting

AS7

7.5 

14.7 

1740

92.7 

4100

6300

9.0 

AS10

10.0 

14.4 

1600

91.9 

4300

6000

9.8 

AS15

15.0 

13.9 

1390

90.3 

4500

5500

12.5 

gearing, paper knives

AF6

fine

Cobalto

6.5 

14.8 

1690

92.5 

3600

5700

9.2 

slitting saws, gun drills

AF12

12.0 

14.3 

1390

90.3 

4200

5200

11.2 

wear proctection

AM6

medium

Cobalto

6.5 

14.8 

1590

91.9 

3600

5500

9.5 

for wear applications with higher toughness requirements

AM8

8.5 

14.6 

1500

91.2 

3800

5300

10.4 

AM11

11.0 

14.4 

1390

90.3 

4000

5000

11.8 

AM15

15.0 

14.0 

1230

88.7 

4200

4500

14.5 

ANC8

medium

Cobalto

8.5 

14.5 

1550

91.6 

3700

5400

10.0 

EDM grades with corrosion inhibitor, optimal stress crack reduction

ANC12

12.0 

14.2 

1380

90.3 

3900

5000

13.0 

AMC15

15.0 

13.9 

1260

89.1 

4100

4500

17.5 

AC10

coarse

Cobalto

10.0 

14.5 

1300

89.5 

3800

4600

12.5 

high toughness;for mining and road construction,hot forming

AC11

11.0 

14.3 

1600

87.6 

2700

4200

14.5 

AC15

15.0 

14.0 

1080

87.2 

4000

4000

18.5 

AC22

22.0 

13.4 

890

84.7 

3800

3500

20.0 

ASN6

submicron

Nickel

6.0 

14.8 

1770

92.9 

3400

6000

8.1 

corrosion restistant, non-magnetisable

ASN8

8.5

14.5 

1650

92.2 

4000

5800

8.5 

AFN8

fine

8

14.5 

1600

91.9 

3900

5500

8.3 

AFN12

12

14.2 

1350

90.0 

4200

5000

11.0 

AFNC11

11

14.2 

1600

91.9 

2100

4500

8.0 

AMN15

medium

15

14.0 

1100

87.3 

3800

4000

13.0 

corrosion restistant

ACT9

coarse

Cobalto

9

14.6

1260

89.0 

2800

4800

11.0 

For tunnel Boring

ACT11

11

14.3

1070

87.0 

2850

4300

13.5

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