Because stainless steel precision parts have excellent corrosion resistance, formability, compatibility, and toughness in a wide temperature range, they are widely used in heavy industry, light industry, daily necessities industry, and building decoration industries. application.

People call alloy steel with chromium content greater than 12% or nickel content greater than 8% as stainless steel.

This steel has certain corrosion resistance in the atmosphere or in corrosive media, and has 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 referred to as stainless steel.

Due to the above-mentioned characteristics of stainless steel, it is more and more widely used in aviation, aerospace, chemical, petroleum, construction and food industries and daily life.

Stainless steel will encounter the following difficulties in the processing process:

Severe work hardening: the plasticity of stainless steel is large, the character is distorted during plastic deformation, and the strengthening coefficient is large; and the austenite is not stable enough, under the action of cutting stress, part of the austenite will be transformed into martensite; plus the compound Under the action of cutting heat, the impurities are easily decomposed and distributed in a dispersed manner, so that a hardened layer is produced during cutting. The work hardening phenomenon produced by the previous feed or the previous process seriously affects the smooth progress of the subsequent process.

Large cutting force: The plastic deformation of stainless steel in the cutting process is large, resulting in an increase in cutting force. Stainless steel has serious work hardening and high thermal strength, which further increases the cutting resistance, and it is also difficult to curl and break the chips.

High cutting temperature: The plastic deformation and friction with the tool are large during cutting, and a lot of cutting heat is generated; a large amount of cutting heat is concentrated on the interface between the cutting area and the tool-chip contact, and the heat dissipation condition is poor.