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在MM7132平面磨床采用单程、往复磨削对调质态42CrMo钢进行磨削淬硬试验。结果表明:0.2 mm三次往复磨削、0.3 mm两次往复磨削、单程0.6 mm磨削条件下淬硬层均获得了马氏体组织。0.2 mm三次往复磨削淬硬层为细小的针状马氏体组织,其显微硬度最高值为824.2 HV;0.3 mm两次往复磨削淬硬层为板条状马氏体组织,其显微硬度最高值为752.2 HV,单程0.6 mm磨削淬硬层为体积略大的板条状马氏体组织,淬硬层的硬度最高值为724.4 HV。
In the MM7132 surface grinder using one-way, reciprocating grinding of quenched and tempered 42CrMo steel hardened test. The results show that: 0.2 mm three reciprocating grinding, 0.3 mm twice reciprocating grinding, one-way 0.6 mm grinding conditions hardened layer were obtained martensite. 0.2 mm three reciprocating grinding hardened layer of fine acicular martensite microstructure, the highest value of the microhardness of 824.2 HV; 0.3 mm twice reciprocating grinding hardened layer lath martensite, the significant The highest microhardness value is 752.2 HV. One-way 0.6 mm grinding hardened layer is a slightly larger lath martensite structure, and the highest hardness of the hardened layer is 724.4 HV.