What Are The Difficulties Of Stainless Steel Cutting?
Jun 30, 2022
Under the action of high cutting temperature of general steel, the metal strength and hardness of chip cutting parts will decrease obviously with the increase of cutting temperature, making the cutting process go smoothly. But the strength and hardness of stainless steel at high temperature has no obvious decline, so the cutting force of stainless steel cutting process is large. It is precisely because the strength and hardness of stainless steel at high temperature decline is not obvious, the cutting force of the cutting process is more concentrated near the blade, easy to cause the plastic deformation and damage of the blade.
1, large cutting force, high cutting temperature
Stainless steel material strength, cutting tangential stress, plastic deformation, so the cutting force. In addition, the poor thermal conductivity of the material causes the cutting temperature to rise, and the high temperature is often concentrated in the long and narrow area near the cutting edge of the tool, thus speeding up the tool wear.
Solution: Select cutting oil products with better cooling performance, increase the cutting oil supply and oil supply pressure, and use multiple nozzles to supply oil to ensure the lubrication effect of the tool and workpiece contact parts.
2, work hardening is serious
Austenitic stainless steel and some high temperature alloy stainless steel are austenitic structure, cutting hardening tendency is large, usually several times of ordinary carbon steel, cutting tools in the hardening area, shorten the tool life.
Solution: choose the tool with higher hardness, arrange the cutting feed reasonably, and use vulcanized cutting oil products with excellent extreme pressure performance.
3, easy to stick knife
Both austenitic stainless steel and martensitic stainless steel have the characteristics of strong chip and high cutting temperature during processing. When the strong chip flows through the front cutter surface, it will produce adhesion, fusion welding and other phenomena, affecting the surface roughness of machined parts.
Solution: Increase the cutting oil supply, reduce the cutting feed and machining speed.
4. Tool wear is accelerated
The materials generally contain high melting point elements, plastic, high cutting temperature, speed up tool wear, tool grinding, tool change frequently, thus affecting the production efficiency, improve the tool cost.
Solution: Reduce cutting feed and machining speed, select cutting oil products with excellent performance, and regularly change the cutting oil.
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