真空淬火(huo)**是把40cr、cr12、H13、SKD11、SKD61、D2、2344、8407、軸承鋼等材(cai)料通(tong)過抽干(gan)空氣淬火、低溫回火4次使材料達到(dao)58—60HRC，以(yi)達到耐磨耐強沖(chong)壓(ya)的目的
真空(kong)(kong)(kong)(kong)(kong)(kong)熱(re)(re)(re)處(chu)(chu)(chu)理(li)是(shi)真空(kong)(kong)(kong)(kong)(kong)(kong)技(ji)(ji)術(shu)與熱(re)(re)(re)處(chu)(chu)(chu)理(li)技(ji)(ji)術(shu)相結(jie)合(he)的(de)(de)新型熱(re)(re)(re)處(chu)(chu)(chu)理(li)技(ji)(ji)術(shu)，真空(kong)(kong)(kong)(kong)(kong)(kong)熱(re)(re)(re)處(chu)(chu)(chu)理(li)所(suo)處(chu)(chu)(chu)的(de)(de)真空(kong)(kong)(kong)(kong)(kong)(kong)環境指(zhi)(zhi)的(de)(de)是(shi)低于一個大氣(qi)壓的(de)(de)氣(qi)氛環境，包(bao)括低真空(kong)(kong)(kong)(kong)(kong)(kong)、中(zhong)等(deng)真空(kong)(kong)(kong)(kong)(kong)(kong)、高真空(kong)(kong)(kong)(kong)(kong)(kong)和超高真空(kong)(kong)(kong)(kong)(kong)(kong)，真空(kong)(kong)(kong)(kong)(kong)(kong)熱(re)(re)(re)處(chu)(chu)(chu)理(li)實(shi)際也屬(shu)于氣(qi)氛控制熱(re)(re)(re)處(chu)(chu)(chu)理(li)。真空(kong)(kong)(kong)(kong)(kong)(kong)熱(re)(re)(re)處(chu)(chu)(chu)理(li)是(shi)指(zhi)(zhi)熱(re)(re)(re)處(chu)(chu)(chu)理(li)工(gong)藝的(de)(de)全部(bu)和部(bu)分在真空(kong)(kong)(kong)(kong)(kong)(kong)狀態下進行的(de)(de)，真空(kong)(kong)(kong)(kong)(kong)(kong)熱(re)(re)(re)處(chu)(chu)(chu)理(li)可以實(shi)現(xian)幾(ji)乎所(suo)有的(de)(de)常規熱(re)(re)(re)處(chu)(chu)(chu)理(li)所(suo)能涉及的(de)(de)熱(re)(re)(re)處(chu)(chu)(chu)理(li)工(gong)藝，但(dan)熱(re)(re)(re)處(chu)(chu)(chu)理(li)質(zhi)量(liang)大大提高。與常規熱(re)(re)(re)處(chu)(chu)(chu)理(li)相比，真空(kong)(kong)(kong)(kong)(kong)(kong)熱(re)(re)(re)處(chu)(chu)(chu)理(li)的(de)(de)同時，可實(shi)現(xian)無(wu)氧(yang)化、無(wu)脫碳、無(wu)滲碳，可去掉工(gong)件表面的(de)(de)磷屑，并有脫脂(zhi)除氣(qi)等(deng)作用(yong)，從而達(da)到表面光亮凈化的(de)(de)效果(guo)
零件經(jing)真(zhen)(zhen)(zhen)空(kong)熱處(chu)理(li)(li)后(hou)(hou)，畸變小，質量高，且工(gong)(gong)藝本身(shen)操作靈活，無(wu)公(gong)害。因(yin)此真(zhen)(zhen)(zhen)空(kong)熱處(chu)理(li)(li)不(bu)僅(jin)是某些特殊合金熱處(chu)理(li)(li)的(de)(de)必要手段，而且在一(yi)般工(gong)(gong)程用鋼的(de)(de)熱處(chu)理(li)(li)中也獲得應(ying)用，特別是工(gong)(gong)具(ju)、模(mo)具(ju)和(he)精密耦件等，經(jing)真(zhen)(zhen)(zhen)空(kong)熱處(chu)理(li)(li)后(hou)(hou)使用壽命較一(yi)般熱處(chu)理(li)(li)有(you)較大的(de)(de)提(ti)高。例(li)如(ru)某些模(mo)具(ju)經(jing)真(zhen)(zhen)(zhen)空(kong)熱處(chu)理(li)(li)后(hou)(hou)，其(qi)壽命比原來鹽浴處(chu)理(li)(li)的(de)(de)高40～400％，而有(you)許多工(gong)具的壽命可提高3～4倍左右。此外，真空加(jia)熱(re)爐(lu)可(ke)在較高溫(wen)度下工作(zuo)，且工件可(ke)以保持(chi)潔(jie)凈(jing)的(de)表面，因(yin)而能加(jia)速化(hua)學熱(re)處(chu)(chu)理的(de)吸(xi)附和(he)反應(ying)過程。因(yin)此，某些(xie)化(hua)學熱(re)處(chu)(chu)理，如(ru)滲(shen)碳、滲(shen)氮、滲(shen)鉻、滲(shen)硼，以及(ji)多元共滲(shen)都能得到(dao)更快(kuai)、更好的(de)效果。 |
