熱處理加工(gong)(gong)在(zai)工(gong)(gong)業領域(yu)隨處可(ke)(ke)見，是金(jin)屬(shu)零部件(jian)比如汽車、航空等金(jin)屬(shu)部件(jian)包括(kuo)42crmo圓鋼(gang)都必不可(ke)(ke)少的(de)(de)(de)加工(gong)(gong)工(gong)(gong)藝，是為了保證加工(gong)(gong)過(guo)后(hou)的(de)(de)(de)合(he)金(jin)部件(jian)更加耐熱、塑型、提高硬度(du)，從而延長產品的(de)(de)(de)使用(yong)(yong)壽命。熱處理是將金(jin)屬(shu)材(cai)料放在(zai)一(yi)定的(de)(de)(de)介質內加熱、保溫、冷(leng)卻(que)，通(tong)過(guo)改變材(cai)料表面或(huo)內部的(de)(de)(de)金(jin)相組織結構，來控(kong)制其(qi)性能的(de)(de)(de)一(yi)種金(jin)屬(shu)熱加工(gong)(gong)工(gong)(gong)藝。下面介紹幾種常(chang)用(yong)(yong)的(de)(de)(de)熱處理工(gong)(gong)藝方法。

　　1、固(gu)溶(rong)(rong)處(chu)理：使合金中各種相充分溶(rong)(rong)解，強化固(gu)溶(rong)(rong)體并提(ti)高韌性(xing)及(ji)抗蝕性(xing)能，消除應力與軟化，以便繼續加(jia)工成型。

　　2、時效處(chu)理：在(zai)強(qiang)化(hua)相析(xi)出的溫(wen)度加熱并保溫(wen)，使強(qiang)化(hua)相沉淀析(xi)出，得以硬化(hua)，提高強(qiang)度。

　　3、鋼(gang)的(de)(de)碳(tan)(tan)(tan)(tan)(tan)(tan)氮(dan)(dan)(dan)共(gong)(gong)滲(shen)(shen)(shen)(shen)(shen)：碳(tan)(tan)(tan)(tan)(tan)(tan)氮(dan)(dan)(dan)共(gong)(gong)滲(shen)(shen)(shen)(shen)(shen)是向鋼(gang)的(de)(de)表層(ceng)同時滲(shen)(shen)(shen)(shen)(shen)入碳(tan)(tan)(tan)(tan)(tan)(tan)和氮(dan)(dan)(dan)的(de)(de)過(guo)程。習慣(guan)上碳(tan)(tan)(tan)(tan)(tan)(tan)氮(dan)(dan)(dan)共(gong)(gong)滲(shen)(shen)(shen)(shen)(shen)又稱為(wei)氰化，目(mu)前以中溫(wen)氣(qi)(qi)體(ti)碳(tan)(tan)(tan)(tan)(tan)(tan)氮(dan)(dan)(dan)共(gong)(gong)滲(shen)(shen)(shen)(shen)(shen)和低溫(wen)氣(qi)(qi)體(ti)碳(tan)(tan)(tan)(tan)(tan)(tan)氮(dan)(dan)(dan)共(gong)(gong)滲(shen)(shen)(shen)(shen)(shen)(即氣(qi)(qi)體(ti)軟氮(dan)(dan)(dan)化)應用較為(wei)廣(guang)泛。中溫(wen)氣(qi)(qi)體(ti)碳(tan)(tan)(tan)(tan)(tan)(tan)氮(dan)(dan)(dan)共(gong)(gong)滲(shen)(shen)(shen)(shen)(shen)的(de)(de)主要目(mu)的(de)(de)是提高(gao)鋼(gang)的(de)(de)硬度，耐(nai)磨性(xing)(xing)和疲勞(lao)強度。低溫(wen)氣(qi)(qi)體(ti)碳(tan)(tan)(tan)(tan)(tan)(tan)氮(dan)(dan)(dan)共(gong)(gong)滲(shen)(shen)(shen)(shen)(shen)以滲(shen)(shen)(shen)(shen)(shen)氮(dan)(dan)(dan)為(wei)主，其主要目(mu)的(de)(de)是提高(gao)鋼(gang)的(de)(de)耐(nai)磨性(xing)(xing)和抗咬合性(xing)(xing)。