Difficulties in processing stainless steel workpieces

The difficulties in processing stainless steel workpieces mainly include the following aspects:


1. High cutting force. The stainless steel workpiece has high strength, large tangential stress and large plastic deformation during cutting, so the cutting force is large.

2. High cutting temperature. The thermal conductivity of stainless steel workpieces is extremely poor, causing the cutting temperature to rise, and the high temperature is often concentrated in the narrow area near the cutting edge of the tool, thus accelerating the wear of the tool.

3. Machining hardened stainless steel workpieces shortens tool life. Austenitic stainless steel and some high-temperature alloy stainless steels have an austenitic structure and have a large tendency to work harden during cutting, usually several times that of ordinary carbon steel. The tool cuts in the work-hardened area, shortening the tool life.

4. Easy to stick to the knife. Both austenitic stainless steel and martensitic stainless steel have the characteristics of strong chips and high cutting temperature during processing. When strong chips flow through the rake face, adhesion, welding and other sticking phenomena will occur, affecting the surface roughness of the machined parts.

5. Accelerated tool wear increases production costs. Stainless steel workpieces generally contain high-melting-point elements, have high plasticity, and have high cutting temperatures, which accelerate tool wear and require frequent tool sharpening and tool changes, thus affecting production efficiency and increasing production costs.

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