(1)使(shi)用合理的夾(jia)緊方法和固定裝置(zhi)
目(mu)的均(jun)勻(yun)加熱和冷(leng)卻工件(jian)(jian)以(yi)減(jian)少不(bu)均(jun)勻(yun)的熱應力和不(bu)均(jun)勻(yun)的組織應力以(yi)減(jian)少變(bian)形。夾緊方法可以(yi)改(gai)變(bian)。圓盤部件(jian)(jian)垂直于油面,軸部件(jian)(jian)垂直安裝。使(shi)用補償墊(dian)圈和支撐墊(dian)圈。 ,花(hua)鍵孔部件(jian)(jian)可使(shi)用滲碳(tan)芯軸,疊加墊(dian)圈等。
(2)加工
當熱(re)處(chu)理(li)(li)是工(gong)(gong)(gong)件加(jia)工(gong)(gong)(gong)過(guo)程的(de)(de)最后(hou)一步時,熱(re)處(chu)理(li)(li)變(bian)(bian)(bian)形(xing)的(de)(de)允(yun)許(xu)值應(ying)滿足(zu)圖紙(zhi)上指定的(de)(de)工(gong)(gong)(gong)件尺寸(cun)(cun),變(bian)(bian)(bian)形(xing)變(bian)(bian)(bian)量(liang)(liang)應(ying)根據(ju)前(qian)(qian)(qian)一加(jia)工(gong)(gong)(gong)的(de)(de)尺寸(cun)(cun)確(que)定。因(yin)(yin)此(ci),根據(ju)工(gong)(gong)(gong)件的(de)(de)變(bian)(bian)(bian)形(xing),應(ying)在熱(re)處(chu)理(li)(li)之前(qian)(qian)(qian)進(jin)行尺寸(cun)(cun)的(de)(de)預(yu)校(xiao)正,以使熱(re)處(chu)理(li)(li)變(bian)(bian)(bian)形(xing)在合(he)(he)格(ge)范圍內。當熱(re)處(chu)理(li)(li)是中(zhong)間過(guo)程時,應(ying)將熱(re)處(chu)理(li)(li)前(qian)(qian)(qian)的(de)(de)加(jia)工(gong)(gong)(gong)余量(liang)(liang)視為加(jia)工(gong)(gong)(gong)余量(liang)(liang)和(he)熱(re)處(chu)理(li)(li)變(bian)(bian)(bian)形(xing)的(de)(de)總(zong)和(he)。通常,加(jia)工(gong)(gong)(gong)余量(liang)(liang)容(rong)易確(que)定,并且由于許(xu)多影響因(yin)(yin)素而(er)使熱(re)處(chu)理(li)(li)更(geng)加(jia)復雜,因(yin)(yin)此(ci)留(liu)有足(zu)夠的(de)(de)加(jia)工(gong)(gong)(gong)余量(liang)(liang)用(yong)于加(jia)工(gong)(gong)(gong),其余的(de)(de)可以用(yong)作熱(re)處(chu)理(li)(li)容(rong)許(xu)變(bian)(bian)(bian)形(xing)變(bian)(bian)(bian)量(liang)(liang)。熱(re)處(chu)理(li)(li)后(hou)的(de)(de)加(jia)工(gong)(gong)(gong)后(hou),根據(ju)工(gong)(gong)(gong)件的(de)(de)變(bian)(bian)(bian)形(xing)規律,采(cai)用(yong)抗變(bian)(bian)(bian)形(xing)和(he)收(shou)縮端預(yu)擴孔,以提高淬(cui)火后(hou)的(de)(de)變(bian)(bian)(bian)形(xing)合(he)(he)格(ge)率。
(3)使用適(shi)當的媒(mei)體
鋼熱處理廠家在確保(bao)相(xiang)(xiang)同的(de)(de)硬度(du)要求的(de)(de)前提下,嘗試使用油性介(jie)質(zhi)(zhi)。實驗和(he)實踐證明,在沒有其他(ta)條件(jian)的(de)(de)前提下,油性介(jie)質(zhi)(zhi)的(de)(de)冷卻速(su)度(du)較慢(man),而(er)水性介(jie)質(zhi)(zhi)的(de)(de)冷卻速(su)度(du)則相(xiang)(xiang)對較快。而(er)且,與油性介(jie)質(zhi)(zhi)相(xiang)(xiang)比,水溫變化對水性介(jie)質(zhi)(zhi)的(de)(de)冷卻特性影響更大。在相(xiang)(xiang)同的(de)(de)熱處理條件(jian)下,與水性介(jie)質(zhi)(zhi)相(xiang)(xiang)比,淬(cui)火后油性介(jie)質(zhi)(zhi)的(de)(de)變形量相(xiang)(xiang)對較小。
鋼熱處理廠家可(ke)以改善工件的(de)(de)(de)機械性能,并提高工件的(de)(de)(de)強(qiang)度和(he)硬(ying)度,但不可(ke)避免地產生變形效果。現階段,我們必須重視中(zhong)國(guo)(guo)熱(re)處(chu)理技術(shu)和(he)設備的(de)(de)(de)改進(jin),不斷學習國(guo)(guo)外先(xian)進(jin)技術(shu),提高熱(re)處(chu)理工件的(de)(de)(de)質量和(he)合(he)格率,為(wei)中(zhong)國(guo)(guo)熱(re)處(chu)理行業做出(chu)貢獻(xian)。