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单位切削层面积切削力部分数据用表在欧、美、日等国家的切削手册、资料中，在进行切削力及切削功率计算时，常采用单位切削力和单位切削功率的概念。所谓单位切削力是指单位切削面积上数控机床的组成的主切削力，用P表示，单位为N/mm2；所谓单位切削功率是指在单位时间内切除单位体积的金属所消耗的切削功率，用Ps表示，单位为KW/(mm3/S)。1.普通车削过程单位切削层面积切削力用表工件材料抗张强度(MPa)或者硬度(HB)比切削力(MPa)0.1(mm/rev)0.2(mm/rev)0.3(mm/rev)0.4(mm/rev)0.6(mm/rev)低碳钢52036103100272025002280中碳钢62030802700257024502300硬钢72040503600325029502640工具钢67030402800263025002400工具钢77031502850262024502340铬锰钢77038303250290026502400铬锰钢63045103900324029002630铬钼钢73045003900340031502850铬钼钢60036103200288027002500镍铬钼钢90030702650235022001980镍铬钼钢352HB33102900258024002200硬铸铁46HRC31902800260024502270高强度铸铁36023001930173016001450灰铸铁200HB211018001600140013302.普通铣削过程单位切削层面积切削力用表工件材料抗张强度(MPa)或者硬度(HB)比切削力(MPa)0.1(mm/rev)0.2(mm/rev)0.3(mm/rev)0.4(mm/rev)0.6(mm/rev)低碳钢52022001950182017001580中碳钢62019801800173016001570硬钢72025202200204018501740工具钢67019801800173017001600工具钢77020301800175017001580铬锰钢77023002000188017501660铬锰钢63027502300206018001780铬钼钢73025402250214020001800铬钼钢60021802000186018001670镍铬钼钢90020001800168016001500镍铬钼钢352HB21001900176017001530铸铁52028002500232022002040硬铸铁46HRC30002700250024002200高强度铸铁36021802000175016001470灰铸铁200HB1750140012401050970黄铜50011509508007000630轻合金(Al-Mg)160580480400350320轻合金(Al-Si)200700600490450390