(1)使(shi)用合理的夾緊方(fang)法和(he)固(gu)定(ding)裝置
目的(de)均勻(yun)加熱(re)(re)和冷(leng)卻工件(jian)以減少不(bu)均勻(yun)的(de)熱(re)(re)應(ying)力(li)和不(bu)均勻(yun)的(de)組織應(ying)力(li)以減少變形。夾緊(jin)方法可以改變。圓(yuan)盤部(bu)件(jian)垂直于油面,軸(zhou)部(bu)件(jian)垂直安裝。使用補(bu)償墊(dian)圈和支撐墊(dian)圈。 ,花鍵(jian)孔部(bu)件(jian)可使用滲碳芯軸(zhou),疊加墊(dian)圈等。
(2)加工
當(dang)熱(re)(re)(re)(re)(re)處(chu)(chu)理(li)是工(gong)(gong)(gong)(gong)件加(jia)(jia)工(gong)(gong)(gong)(gong)過程的(de)(de)(de)最后(hou)一步時(shi),熱(re)(re)(re)(re)(re)處(chu)(chu)理(li)變(bian)(bian)(bian)形的(de)(de)(de)允許值應(ying)滿足(zu)圖紙上(shang)指定(ding)的(de)(de)(de)工(gong)(gong)(gong)(gong)件尺寸,變(bian)(bian)(bian)形變(bian)(bian)(bian)量(liang)應(ying)根(gen)據前一加(jia)(jia)工(gong)(gong)(gong)(gong)的(de)(de)(de)尺寸確定(ding)。因(yin)此,根(gen)據工(gong)(gong)(gong)(gong)件的(de)(de)(de)變(bian)(bian)(bian)形,應(ying)在熱(re)(re)(re)(re)(re)處(chu)(chu)理(li)之前進行尺寸的(de)(de)(de)預(yu)校正,以使熱(re)(re)(re)(re)(re)處(chu)(chu)理(li)變(bian)(bian)(bian)形在合(he)格(ge)范(fan)圍內。當(dang)熱(re)(re)(re)(re)(re)處(chu)(chu)理(li)是中間過程時(shi),應(ying)將熱(re)(re)(re)(re)(re)處(chu)(chu)理(li)前的(de)(de)(de)加(jia)(jia)工(gong)(gong)(gong)(gong)余量(liang)視為加(jia)(jia)工(gong)(gong)(gong)(gong)余量(liang)和熱(re)(re)(re)(re)(re)處(chu)(chu)理(li)變(bian)(bian)(bian)形的(de)(de)(de)總和。通(tong)常(chang),加(jia)(jia)工(gong)(gong)(gong)(gong)余量(liang)容易(yi)確定(ding),并且由于許多影響因(yin)素而使熱(re)(re)(re)(re)(re)處(chu)(chu)理(li)更加(jia)(jia)復雜(za),因(yin)此留有足(zu)夠的(de)(de)(de)加(jia)(jia)工(gong)(gong)(gong)(gong)余量(liang)用于加(jia)(jia)工(gong)(gong)(gong)(gong),其余的(de)(de)(de)可以用作熱(re)(re)(re)(re)(re)處(chu)(chu)理(li)容許變(bian)(bian)(bian)形變(bian)(bian)(bian)量(liang)。熱(re)(re)(re)(re)(re)處(chu)(chu)理(li)后(hou)的(de)(de)(de)加(jia)(jia)工(gong)(gong)(gong)(gong)后(hou),根(gen)據工(gong)(gong)(gong)(gong)件的(de)(de)(de)變(bian)(bian)(bian)形規律,采用抗變(bian)(bian)(bian)形和收縮(suo)端預(yu)擴孔(kong),以提(ti)高(gao)淬(cui)火后(hou)的(de)(de)(de)變(bian)(bian)(bian)形合(he)格(ge)率。
(3)使用適當的媒體
鋼熱處理廠家在確保相同的硬度要求的前提(ti)下(xia),嘗試使用油(you)性介質(zhi)(zhi)。實驗和(he)實踐證明,在沒有其他條(tiao)件的前提(ti)下(xia),油(you)性介質(zhi)(zhi)的冷(leng)(leng)卻(que)速度較慢,而(er)(er)水(shui)性介質(zhi)(zhi)的冷(leng)(leng)卻(que)速度則相對較快。而(er)(er)且,與(yu)油(you)性介質(zhi)(zhi)相比,水(shui)溫變(bian)化對水(shui)性介質(zhi)(zhi)的冷(leng)(leng)卻(que)特性影響更大(da)。在相同的熱處(chu)理條(tiao)件下(xia),與(yu)水(shui)性介質(zhi)(zhi)相比,淬火(huo)后(hou)油(you)性介質(zhi)(zhi)的變(bian)形量相對較小。
鋼熱處理廠家可以改善(shan)工(gong)件(jian)的(de)(de)機械性能,并提高工(gong)件(jian)的(de)(de)強度(du)和硬度(du),但(dan)不可避免(mian)地產生變形效果(guo)。現階(jie)段,我們必須重視中國熱(re)處(chu)理(li)(li)技(ji)(ji)術和設備的(de)(de)改進(jin)(jin),不斷學習國外先進(jin)(jin)技(ji)(ji)術,提高熱(re)處(chu)理(li)(li)工(gong)件(jian)的(de)(de)質量和合格率,為中國熱(re)處(chu)理(li)(li)行業(ye)做出(chu)貢獻。