工件材料的硬度對切削加工性的影響

工(gong)(gong)件材料(liao)(liao)的(de)硬度越(yue)(yue)(yue)高(gao)(gao)，加(jia)工(gong)(gong)件越(yue)(yue)(yue)差。這是(shi)因為硬度高(gao)(gao)，切削力大，切削溫(wen)度高(gao)(gao)，刀具磨損(sun)快的(de)緣故。工(gong)(gong)件材料(liao)(liao)的(de)高(gao)(gao)溫(wen)硬度越(yue)(yue)(yue)高(gao)(gao)，加(jia)工(gong)(gong)性(xing)越(yue)(yue)(yue)差。這是(shi)因為切削溫(wen)度對切削過程(cheng)的(de)有利影響，對高(gao)(gao)溫(wen)硬度高(gao)(gao)的(de)材料(liao)(liao)作用不明顯。高(gao)(gao)溫(wen)合金、耐熱(re)鋼的(de)加(jia)工(gong)(gong)性(xing)差，其(qi)(qi)高(gao)(gao)溫(wen)硬度高(gao)(gao)是(shi)一(yi)(yi)很重要的(de)原(yuan)因。工(gong)(gong)件材料(liao)(liao)中硬質點(dian)(dian)越(yue)(yue)(yue)多，分(fen)布越(yue)(yue)(yue)廣(guang)，則加(jia)工(gong)(gong)性(xing)越(yue)(yue)(yue)差。這是(shi)因為硬質點(dian)(dian)加(jia)速了刀具磨損(sun)。工(gong)(gong)件材料(liao)(liao)加(jia)工(gong)(gong)硬化(hua)超嚴重，則切削加(jia)工(gong)(gong)性(xing)越(yue)(yue)(yue)差。不銹鋼之所以難加(jia)工(gong)(gong)，加(jia)工(gong)(gong)硬化(hua)嚴重是(shi)其(qi)(qi)主要原(yuan)因之一(yi)(yi)。

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