When processing stainless steel precision parts, we have to be fast, accurate and precise, but we will encounter difficulties in processing, the following stainless steel precision parts processing Xiaobian will talk to you about it!
Because of the quality of food resistance, forming, suitability and a wide range of temperature range of the strong toughening characteristics, so in heavy industry, light industry, household goods industry and building decoration industry is widely used.
Alloy steel with chromium content greater than 12% or nickel content greater than 8% is called stainless steel.
This steel has a certain degree of corrosion resistance in the atmosphere or corrosive media, and has high strength at higher temperatures (> 450 ℃). Chromium content of 16% to 18% of the steel is called acid-resistant steel or acid-resistant stainless steel, commonly known as stainless steel.
Due to the above characteristics of stainless steel, it is increasingly widely used in aviation, aerospace, chemical, petroleum, construction, food and other industrial sectors and in daily life.
The following difficulties are encountered in the processing of stainless steel.
Machining hardening is serious: stainless steel plasticity, plastic deformation when the trait distortion, strengthening coefficient; in addition, austenite is not stable enough, part of the austenite in the cutting stress can be transformed into martensite; in addition, composite impurities in the cutting heat under the action of easy decomposition and dispersion, resulting in the cutting process of hardening layer. The previous feed or the previous process caused by the machining hardening phenomenon seriously affects the smooth progress of subsequent processes.
Cutting force is large: stainless steel in the cutting process has a large plastic deformation, resulting in increased cutting force. Stainless steel has severe work hardening and high thermal strength, which further increases the cutting resistance, and difficult to curl and break the chip.
High cutting temperature: cutting plastic deformation, and tool friction, cutting heat; a large amount of cutting heat is concentrated in the cutting area and tool-chip contact interface, poor heat dissipation conditions.