(1)使用(yong)合理的夾緊(jin)方(fang)法和(he)固(gu)定裝置
目(mu)的均(jun)勻加熱(re)和冷卻(que)工件(jian)以減少(shao)不均(jun)勻的熱(re)應(ying)(ying)力(li)和不均(jun)勻的組(zu)織應(ying)(ying)力(li)以減少(shao)變形。夾緊(jin)方法可以改變。圓盤部件(jian)垂直(zhi)于油面,軸部件(jian)垂直(zhi)安裝。使用(yong)補償墊(dian)圈(quan)和支撐墊(dian)圈(quan)。 ,花鍵孔(kong)部件(jian)可使用(yong)滲(shen)碳芯軸,疊加墊(dian)圈(quan)等。
(2)加工
當熱(re)(re)處(chu)(chu)(chu)理(li)(li)是工(gong)(gong)(gong)(gong)件(jian)加(jia)工(gong)(gong)(gong)(gong)過(guo)程(cheng)的(de)(de)(de)(de)最后(hou)一(yi)(yi)步時,熱(re)(re)處(chu)(chu)(chu)理(li)(li)變(bian)(bian)形(xing)(xing)的(de)(de)(de)(de)允(yun)許(xu)值(zhi)應(ying)滿足(zu)圖紙上(shang)指定(ding)的(de)(de)(de)(de)工(gong)(gong)(gong)(gong)件(jian)尺(chi)寸(cun),變(bian)(bian)形(xing)(xing)變(bian)(bian)量應(ying)根據前(qian)一(yi)(yi)加(jia)工(gong)(gong)(gong)(gong)的(de)(de)(de)(de)尺(chi)寸(cun)確定(ding)。因此,根據工(gong)(gong)(gong)(gong)件(jian)的(de)(de)(de)(de)變(bian)(bian)形(xing)(xing),應(ying)在熱(re)(re)處(chu)(chu)(chu)理(li)(li)之(zhi)前(qian)進行尺(chi)寸(cun)的(de)(de)(de)(de)預校正,以(yi)使熱(re)(re)處(chu)(chu)(chu)理(li)(li)變(bian)(bian)形(xing)(xing)在合格范(fan)圍內。當熱(re)(re)處(chu)(chu)(chu)理(li)(li)是中間(jian)過(guo)程(cheng)時,應(ying)將熱(re)(re)處(chu)(chu)(chu)理(li)(li)前(qian)的(de)(de)(de)(de)加(jia)工(gong)(gong)(gong)(gong)余(yu)量視(shi)為加(jia)工(gong)(gong)(gong)(gong)余(yu)量和熱(re)(re)處(chu)(chu)(chu)理(li)(li)變(bian)(bian)形(xing)(xing)的(de)(de)(de)(de)總和。通常,加(jia)工(gong)(gong)(gong)(gong)余(yu)量容(rong)易確定(ding),并且由于許(xu)多影(ying)響(xiang)因素(su)而使熱(re)(re)處(chu)(chu)(chu)理(li)(li)更加(jia)復雜,因此留(liu)有足(zu)夠的(de)(de)(de)(de)加(jia)工(gong)(gong)(gong)(gong)余(yu)量用于加(jia)工(gong)(gong)(gong)(gong),其余(yu)的(de)(de)(de)(de)可以(yi)用作熱(re)(re)處(chu)(chu)(chu)理(li)(li)容(rong)許(xu)變(bian)(bian)形(xing)(xing)變(bian)(bian)量。熱(re)(re)處(chu)(chu)(chu)理(li)(li)后(hou)的(de)(de)(de)(de)加(jia)工(gong)(gong)(gong)(gong)后(hou),根據工(gong)(gong)(gong)(gong)件(jian)的(de)(de)(de)(de)變(bian)(bian)形(xing)(xing)規(gui)律,采用抗變(bian)(bian)形(xing)(xing)和收(shou)縮端預擴孔(kong),以(yi)提高淬火后(hou)的(de)(de)(de)(de)變(bian)(bian)形(xing)(xing)合格率。
(3)使用適當(dang)的媒體
鋼熱處理廠家在確保(bao)相同的(de)硬度要(yao)求的(de)前提(ti)下,嘗試使用油(you)性(xing)(xing)介(jie)(jie)質(zhi)(zhi)。實(shi)驗和(he)實(shi)踐證明,在沒有其(qi)他條(tiao)件(jian)(jian)的(de)前提(ti)下,油(you)性(xing)(xing)介(jie)(jie)質(zhi)(zhi)的(de)冷(leng)(leng)卻速(su)度較慢,而水(shui)(shui)性(xing)(xing)介(jie)(jie)質(zhi)(zhi)的(de)冷(leng)(leng)卻速(su)度則相對較快(kuai)。而且,與(yu)油(you)性(xing)(xing)介(jie)(jie)質(zhi)(zhi)相比,水(shui)(shui)溫變(bian)(bian)化對水(shui)(shui)性(xing)(xing)介(jie)(jie)質(zhi)(zhi)的(de)冷(leng)(leng)卻特性(xing)(xing)影響(xiang)更大。在相同的(de)熱處理(li)條(tiao)件(jian)(jian)下,與(yu)水(shui)(shui)性(xing)(xing)介(jie)(jie)質(zhi)(zhi)相比,淬(cui)火后油(you)性(xing)(xing)介(jie)(jie)質(zhi)(zhi)的(de)變(bian)(bian)形量相對較小(xiao)。
鋼熱處理廠家可(ke)以改善(shan)工(gong)件(jian)的(de)機(ji)械性能,并(bing)提高工(gong)件(jian)的(de)強度(du)和硬度(du),但不(bu)可(ke)避(bi)免(mian)地產生變形效果。現階段,我們必須重(zhong)視(shi)中(zhong)國熱處(chu)理(li)(li)技術(shu)和設備的(de)改進,不(bu)斷學習國外先(xian)進技術(shu),提高熱處(chu)理(li)(li)工(gong)件(jian)的(de)質量(liang)和合格率,為中(zhong)國熱處(chu)理(li)(li)行業做出貢獻(xian)。