Difficulties in processing stainless steel

Stainless steel precision parts are widely used in heavy industry, light industry, household goods industry, and architectural decoration industries due to their excellent corrosion resistance, formability, compatibility, and toughness over a wide temperature range. application.

Alloy steels containing more than 12% chromium or more than 8% nickel are called stainless steel. This steel has a certain corrosion resistance in the atmosphere or in corrosive media and has a high strength at higher temperatures (>450 ° C). Steel with a chromium content of 16% to 18% is called acid-resistant steel or acid-resistant stainless steel, and is commonly known as stainless steel.

Due to the above characteristics of stainless steel, it is more and more widely used in industrial sectors such as aviation, aerospace, chemical, petroleum, construction and food, and daily life.
Stainless steel has the following characteristics in the CNC non-standard machining cutting process:

Severe work hardening: the plasticity of stainless steel is large, the character is twisted and twisted during plastic deformation, and the strengthening coefficient is large; and the austenite is not stable enough, some austenite will be transformed into martensite under the action of cutting stress; plus compound Impurities are easily decomposed into a diffuse distribution under the action of cutting heat, resulting in a hardened layer during cutting. The work hardening phenomenon caused by the previous feed or the previous process seriously affects the smooth progress of the subsequent process.
Large cutting force: stainless steel precision production has large plastic deformation during cutting, resulting in increased cutting force. The work hardening of stainless steel is severe, and the heat strength is high, which further increases the cutting resistance, and the curling and breaking of the chips is also difficult.