Custom stainless steel machining

Due to its excellent corrosion resistance, formability, compatibility and toughness in a wide temperature range, stainless steel has been widely used in heavy industry, light industry, daily necessities industry and building decoration industries. . Especially Stainless Steel Precision Machining parts, such as Stainless Steel Turning parts, Stainless Steel Milling parts, stainless steel turning parts and so on.

People call alloy steel with a chromium content greater than 12% or a nickel content greater than 8% stainless steel. This steel has certain corrosion resistance in the atmosphere or in corrosive media, and has higher 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, which is commonly referred to as stainless steel.
Due to the many advantages of stainless steel, it is more and more widely used in industrial sectors such as aviation, aerospace, chemical industry, petroleum, construction and food and in daily life.

After long-term Stainless Steel Machining practice, it is concluded that stainless steel has the following characteristics in the CNC cutting process:

Serious 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 is transformed into martensite; Under the action of cutting heat, impurities are easily decomposed and distributed in a dispersed manner, resulting in a hardened layer 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 during the cutting process is large, resulting in an increase in the cutting force. The work hardening of stainless steel is serious and the thermal strength is high, which further increases the cutting resistance, and the curling and breaking of the chips is also difficult.
High cutting temperature: The plastic deformation and the 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 cutting area and the interface between the cutter and the chip, and the heat dissipation conditions are poor.

Chips are not easy to break and stick easily: stainless steel has great plasticity and toughness. During CNC Machining, the chips are continuous, which not only affects the smooth operation of the operation, but also crushes the machined surface. Under high temperature and high pressure, stainless steel has a strong affinity with other metals, which is easy to produce adhesion and form built-up edge, which not only aggravates tool wear, but also causes tearing and deteriorates the machined surface.
The tool is easy to wear: the affinity effect in the process of cutting stainless steel makes the tool-chip bond and diffuse, so that the tool produces bond wear and diffusion wear, resulting in crescent craters on the rake face of the tool, and the cutting edge will also form tiny In addition, the hardness of carbide (such as TiC) particles in stainless steel is very high, and direct contact with the tool during cutting, friction, scratching of the tool, and work hardening will aggravate tool wear.

Large linear expansion coefficient: The linear expansion coefficient of stainless steel is about 1.5 times that of carbon steel. Under the action of cutting temperature, the workpiece is prone to thermal deformation, and the dimensional accuracy is difficult to control.
Stainless steel is increasingly used in electric power, aviation, aerospace, petroleum and food industries due to its special properties. Although stainless steel cutting has the characteristics of high thermal strength, large plastic deformation, serious work hardening, more cutting heat, and difficulty in heat dissipation, by choosing appropriate tools, cutting fluids, cutting amounts, processing methods and other measures, the processing quality of stainless steel can finally be guaranteed.

If you need to know more about stainless steel CNC machined parts, please do not hesitate to send an email to: info@sczyltd.com