一(yi)般碳含量(liang)≤0.25%的(de)(de)鋼(gang)叫高碳鋼(gang),高碳鋼(gang)淬火機構(gou)為(wei)金相組織(zhi)和(he)小量(liang)鐵素體,其(qi)抗(kang)壓強度(du)和(he)強度(du)較低,塑性(xing)變形(xing)和(he)延展(zhan)性(xing)不錯,便于拉撥、沖壓模(mo)具、擠壓成(cheng)型、煅造和(he)電焊焊接,在其(qi)中(zhong)20Cr鋼(gang)主要用途比較普遍(bian)。該(gai)鋼(gang)有一(yi)定的(de)(de)抗(kang)壓強度(du),這類鋼(gang)熱處理(li)超低溫(wen)淬火后具備(bei)優(you)良(liang)(liang)的(de)(de)綜(zong)合性(xing)物理(li)性(xing)能,超低溫(wen)斷裂韌(ren)性(xing)優(you)良(liang)(liang),淬火延性(xing)不顯著。
主(zhu)要用途:在(zai)機械(xie)加(jia)工(gong)行(xing)(xing)業中(zhong)(zhong)(zhong)適(shi)合制(zhi)做電(dian)焊(han)(han)焊(han)(han)接零(ling)部件(jian)及(ji)其經煅造(zao)、熱沖(chong)壓(ya)模具和(he)機械(xie)加(jia)工(gong)制(zhi)造(zao)而不會受到高地應力的(de)零(ling)件(jian),在(zai)汽輪(lun)發電(dian)機和(he)加(jia)熱爐加(jia)工(gong)業中(zhong)(zhong)(zhong)有用以非浸蝕(shi)物質中(zhong)(zhong)(zhong)工(gong)作中(zhong)(zhong)(zhong)的(de)水管、法蘭盤、聯箱及(ji)各種各樣標準件(jian);也適(shi)用生產制(zhi)造(zao)小(xiao)車、大(da)拖拉機及(ji)一般機械(xie)加(jia)工(gong)行(xing)(xing)業中(zhong)(zhong)(zhong)的(de)大(da)中(zhong)(zhong)(zhong)小(xiao)型(xing)滲氮(dan)、碳氮(dan)共滲等(deng)零(ling)件(jian),如車上的(de)剎車剎車蹄(ti)、桿(gan)杠軸(zhou)、變(bian)速(su)器速(su)叉(cha)、傳動(dong)系統普攻(gong)傳動(dong)齒輪(lun)及(ji)大(da)拖拉機上發動(dong)機凸(tu)輪(lun)軸(zhou)、懸架(jia)平衡(heng)器軸(zhou)、平衡(heng)器內外軸(zhou)套(tao)等(deng);在(zai)重、中(zhong)(zhong)(zhong)小(xiao)型(xing)機械(xie)加(jia)工(gong)行(xing)(xing)業中(zhong)(zhong)(zhong),如鍛制(zhi)或支撐(cheng)桿(gan)、鉤環、桿(gan)杠、套(tao)筒(tong)規(gui)格(ge)、工(gong)裝夾具等(deng)。
高(gao)(gao)(gao)碳(tan)(tan)(tan)鋼(gang)(gang)滲氮:碳(tan)(tan)(tan)含水(shui)量在0.15%左右的(de)高(gao)(gao)(gao)碳(tan)(tan)(tan)鋼(gang)(gang)經滲碳(tan)(tan)(tan)淬(cui)(cui)火、超低(di)溫淬(cui)(cui)火解決(jue)后(hou),用以規定表(biao)(biao)面規定強(qiang)(qiang)度(du)高(gao)(gao)(gao)、耐(nai)磨性(xing)(xing)能好(hao)的(de)軸(zhou)(zhou)、軸(zhou)(zhou)套、鏈輪鏈條和一(yi)些注塑模具(ju)等零(ling)件。高(gao)(gao)(gao)碳(tan)(tan)(tan)鋼(gang)(gang)經滲碳(tan)(tan)(tan)淬(cui)(cui)火、超低(di)溫淬(cui)(cui)火解決(jue)后(hou)贏得表(biao)(biao)層(ceng)(ceng)為高(gao)(gao)(gao)碳(tan)(tan)(tan)鋼(gang)(gang)奧氏體、芯(xin)部(bu)為低(di)碳(tan)(tan)(tan)環保奧氏體的(de)機構(gou),進而確保表(biao)(biao)層(ceng)(ceng)具(ju)備很高(gao)(gao)(gao)韌性(xing)(xing)、高(gao)(gao)(gao)耐(nai)磨性(xing)(xing)能而芯(xin)部(bu)具(ju)備非常好(hao)的(de)抗壓強(qiang)(qiang)度(du)、延展性(xing)(xing)。合適制做剎(cha)(cha)車剎(cha)(cha)車蹄(ti)、桿杠軸(zhou)(zhou)、變速器速叉、傳動(dong)系統普(pu)攻傳動(dong)齒輪及大拖拉機上發動(dong)機凸輪軸(zhou)(zhou)、懸架平(ping)衡器軸(zhou)(zhou)、平(ping)衡器內外軸(zhou)(zhou)套、套筒規格、工裝夾(jia)具(ju)等零(ling)件。