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Key words:Stainless Steel Turning Method, Tool Material, Tool Parameters, Cutting Amount, Coating Tool

Stainless Steel Turning
The currently applied stainless steel is mainly divided into martensitic stainless steel, ferritic stainless steel and austenitic stainless steel according to its state of organization. The alloy steel containing more than chromium or more than 8% nickel is often called stainless steel. The addition of more metallic elements (Cr and Ni) to the alloy steel grade changes the physical and chemical properties of the alloy. Enhanced corrosion resistance, both in air and in acid solution, are not susceptible to oxidative rust and still have higher strength at higher temperatures . Therefore, it is widely used in aviation, aerospace, chemical, petroleum, construction and food industries and daily life.

(1) Carbide tool
In general, YG-based carbide machining tools are preferred for most difficult-to-machine materials. It is best not to use YT type hard alloys, especially when processing 1Cr18Ni9Ti austenitic stainless steel, YT type hard alloy should be absolutely avoided. Since titanium (Ti) in stainless steel and Ti in the YT-based cemented carbide have an affinity, the cutting tends to take away the Ti in the alloy, which causes the tool wear to be intensified. YG cemented carbide has good toughness, high wear resistance and hardness. It is more suitable for the processing of stainless steel materials. It can adopt a larger front angle to make the cutting lighter. Thermal conductivity is also good; At the same time, the chip and the tool are not easy to bond.

(2) high speed steel tool
When the shape, size and structure of the workpiece are inconvenient to use cemented carbide cutter, or the cemented carbide cutter is easy to damage. High-performance high-speed steel tools are required. Ordinary high-speed steel (such as W18Cr4V, etc.) has a very low tool life and does not meet the requirements.