Stainless Steel Machining Characteristics And Choice Of Milling Cutter

DALIAN, China - Aug. 30, 2021 - PRLog -- Compared with the workability of 45# steel, the workability of austenitic stainless steel is only 0.4, ferritic stainless steel is only 0.48, and martensitic stainless steel is only 0.55. Among them, the workability of austenite and carbonite mixture is worse.

1. Severe Work Hardening

The work hardening of stainless steel is serious. The first choice is the mixture of austenite and ferrite. The hardness of the hardened layer is 1.4~2.2 times higher than the original matrix hardness, and the strength is R=1470~1960MPa. This type of stainless steel has a large plasticity and a large strengthening coefficient. Moreover, austenite is unstable and easily transforms into martensite under the action of cutting force.

2. Large Cutting Force

Stainless steel has high plasticity, especially the depth rate of austenitic stainless steel is 2.5 times that of 45# steel. In the process of milling, the plastic deformation is large, the cutting force is increased, the work hardening is serious, the thermal strength is high, and the cutting curl and break are difficult.

3. High Cutting Temperature

Stainless steel has large plastic deformation, increased friction, and its thermal conductivity is relatively low. Therefore, under the same conditions, the temperature of milling stainless steel is about 200 degrees higher than that of No. 45 steel.

4. Cutting Is Not Easy To Break

When processing stainless steel, it is easy to bond and produce built-up edge. The plasticity and toughness of stainless steel are relatively large, and it is not easy to break when milling. Under high temperature and high pressure, the tool is prone to adhesive wear and built-up edge.

5. The Tool Is Easy To Wear

Of course, stainless steel milling cutters must be used to process stainless steel, because the TiC hard point of stainless steel is likely to cause violent grinding and wear of the tool. Under high-speed, high-temperature and high-pressure conditions, cutting and cutting tools are prone to adhesion, diffusion and crater wear.
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