1. Improve the chemical composition of the material
Taking common metals as an example, 1% to 3% of lead is added to the brass, and 0.1% to 0.25% of lead is added to the steel. Lead can be present in the metallurgical structure of the material by spherical particles. It can lubricate well during cutting, reduce friction and improve tool durability and surface quality. Adding MnS to carbon steel, which is distributed in the pearlite, acts as a lubricant to improve the durability of the tool and the surface quality after cutting, increase the brittleness, and the chips are easily broken.
2. Proper heat treatment before material processing
After normalizing the low carbon steel, the grain is refined, the hardness is improved, and the plasticity is reduced, which is beneficial to reduce the bond wear of the tool, reduce the accumulated chips, and improve the surface roughness of the workpiece. After the spheroidizing annealing of the high carbon steel, the hardness Decrease to reduce tool wear; stainless steel is suitable for quenching and tempering to HRC28, hardness is too low, plasticity is large, surface roughness of the workpiece is poor, and the hardness is high, the tool is easy to wear; White cast iron can be annealed in a range of 950 to 1000 ° C for a long time, making it easier to cut.
3. Select a good material state
After low-carbon steel is cold drawn, the plasticity is reduced and the processability is good;The forged blank has an uneven amount of allowance, and has a hard skin, and has poor workability, and the workability after hot rolling is improved.
Using appropriate tool materials, selecting reasonable tool geometry parameters, and rationally determining the amount of cutting and the choice of cutting fluid can also affect the cutting performance of the material.