(1)使(shi)用合理的(de)夾緊方法和固定(ding)裝置
目的(de)(de)均(jun)(jun)(jun)勻(yun)(yun)加熱和(he)冷卻工件(jian)以(yi)減(jian)少不均(jun)(jun)(jun)勻(yun)(yun)的(de)(de)熱應(ying)力(li)和(he)不均(jun)(jun)(jun)勻(yun)(yun)的(de)(de)組(zu)織應(ying)力(li)以(yi)減(jian)少變形(xing)。夾緊方法可(ke)(ke)以(yi)改變。圓盤部(bu)件(jian)垂(chui)直于油(you)面,軸部(bu)件(jian)垂(chui)直安(an)裝。使用(yong)補償墊圈(quan)和(he)支撐墊圈(quan)。 ,花(hua)鍵孔部(bu)件(jian)可(ke)(ke)使用(yong)滲(shen)碳芯軸,疊加墊圈(quan)等。
(2)加工
當熱(re)(re)處(chu)(chu)理(li)(li)(li)(li)是工(gong)件(jian)(jian)加(jia)工(gong)過程的(de)(de)(de)最后(hou)一步時,熱(re)(re)處(chu)(chu)理(li)(li)(li)(li)變(bian)(bian)(bian)形(xing)(xing)的(de)(de)(de)允許值應滿足(zu)圖(tu)紙上指定(ding)的(de)(de)(de)工(gong)件(jian)(jian)尺寸(cun),變(bian)(bian)(bian)形(xing)(xing)變(bian)(bian)(bian)量(liang)應根據前一加(jia)工(gong)的(de)(de)(de)尺寸(cun)確(que)定(ding)。因此(ci),根據工(gong)件(jian)(jian)的(de)(de)(de)變(bian)(bian)(bian)形(xing)(xing),應在(zai)熱(re)(re)處(chu)(chu)理(li)(li)(li)(li)之前進行(xing)尺寸(cun)的(de)(de)(de)預校正,以使熱(re)(re)處(chu)(chu)理(li)(li)(li)(li)變(bian)(bian)(bian)形(xing)(xing)在(zai)合格范圍內。當熱(re)(re)處(chu)(chu)理(li)(li)(li)(li)是中間過程時,應將熱(re)(re)處(chu)(chu)理(li)(li)(li)(li)前的(de)(de)(de)加(jia)工(gong)余(yu)量(liang)視為加(jia)工(gong)余(yu)量(liang)和熱(re)(re)處(chu)(chu)理(li)(li)(li)(li)變(bian)(bian)(bian)形(xing)(xing)的(de)(de)(de)總和。通(tong)常,加(jia)工(gong)余(yu)量(liang)容易(yi)確(que)定(ding),并且由于許多影響因素而使熱(re)(re)處(chu)(chu)理(li)(li)(li)(li)更加(jia)復雜(za),因此(ci)留有足(zu)夠(gou)的(de)(de)(de)加(jia)工(gong)余(yu)量(liang)用(yong)于加(jia)工(gong),其(qi)余(yu)的(de)(de)(de)可以用(yong)作熱(re)(re)處(chu)(chu)理(li)(li)(li)(li)容許變(bian)(bian)(bian)形(xing)(xing)變(bian)(bian)(bian)量(liang)。熱(re)(re)處(chu)(chu)理(li)(li)(li)(li)后(hou)的(de)(de)(de)加(jia)工(gong)后(hou),根據工(gong)件(jian)(jian)的(de)(de)(de)變(bian)(bian)(bian)形(xing)(xing)規律(lv),采用(yong)抗(kang)變(bian)(bian)(bian)形(xing)(xing)和收縮端預擴孔,以提高(gao)淬火后(hou)的(de)(de)(de)變(bian)(bian)(bian)形(xing)(xing)合格率。
(3)使用(yong)適當的媒體(ti)
鋼熱處理廠家在確保相(xiang)同的硬度(du)要求(qiu)的前提(ti)下(xia),嘗(chang)試(shi)使用油性(xing)(xing)介質。實(shi)(shi)驗和實(shi)(shi)踐證明,在沒有其他條件的前提(ti)下(xia),油性(xing)(xing)介質的冷卻(que)速度(du)較慢(man),而水(shui)性(xing)(xing)介質的冷卻(que)速度(du)則相(xiang)對較快。而且,與油性(xing)(xing)介質相(xiang)比(bi),水(shui)溫變化對水(shui)性(xing)(xing)介質的冷卻(que)特(te)性(xing)(xing)影響(xiang)更大。在相(xiang)同的熱處理(li)條件下(xia),與水(shui)性(xing)(xing)介質相(xiang)比(bi),淬火后油性(xing)(xing)介質的變形(xing)量相(xiang)對較小。
鋼熱處理廠家可以改善工件的機械性能,并提高工件的強度(du)和(he)硬度(du),但不(bu)可避(bi)免地產(chan)生變(bian)形效果。現階(jie)段,我們必須重視(shi)中國(guo)熱(re)處理技(ji)術和(he)設備的改進,不(bu)斷學(xue)習(xi)國(guo)外(wai)先進技(ji)術,提高熱(re)處理工件的質量和(he)合(he)格率,為中國(guo)熱(re)處理行業做出貢獻。