耐(nai)(nai)(nai)熱(re)鋼(gang)(gang)(gang)鑄(zhu)(zhu)件(jian)(jian)(jian)高合金耐(nai)(nai)(nai)磨(mo)(mo)(mo)鋼(gang)(gang)(gang)無法(fa)加工形(xing)變，生產鑄(zhu)(zhu)件(jian)(jian)(jian)不僅比軋材(cai)劃算，而且(qie)鑄(zhu)(zhu)件(jian)(jian)(jian)還(huan)有(you)很高的(de)持(chi)久強度(du)。因此在耐(nai)(nai)(nai)磨(mo)(mo)(mo)鋼(gang)(gang)(gang)中(zhong)耐(nai)(nai)(nai)熱(re)鑄(zhu)(zhu)鋼(gang)(gang)(gang)占有(you)非(fei)常(chang)(chang)大(da)的(de)占比。鑄(zhu)(zhu)造(zao)方法(fa)除采(cai)(cai)用(yong)(yong)砂模(mo)鑄(zhu)(zhu)造(zao)外，還(huan)可(ke)用(yong)(yong)精密鑄(zhu)(zhu)造(zao)工藝(yi)(yi)以獲得(de)表面光潔、尺寸(cun)產品。對合成氨和(he)乙烯裂解使用(yong)(yong)的(de)高溫(wen)(wen)電(dian)爐管通常(chang)(chang)采(cai)(cai)用(yong)(yong)擠壓鑄(zhu)(zhu)造(zao)的(de)方式。熱(re)處(chu)(chu)理(li)(li)工藝(yi)(yi)鐵素體熱(re)強鋼(gang)(gang)(gang)通常(chang)(chang)經(jing)正(zheng)火或調質(zhi)后再用(yong)(yong)；馬(ma)氏體耐(nai)(nai)(nai)磨(mo)(mo)(mo)鋼(gang)(gang)(gang)用(yong)(yong)調質(zhi)熱(re)處(chu)(chu)理(li)(li)，以平穩機構(gou)(gou)，獲得(de)優(you)良(liang)綜(zong)合物理(li)(li)性(xing)能和(he)持(chi)續(xu)高溫(wen)(wen)硬度(du)。耐(nai)(nai)(nai)熱(re)鋼(gang)(gang)(gang)鑄(zhu)(zhu)件(jian)(jian)(jian)無法(fa)通過(guo)熱(re)處(chu)(chu)理(li)(li)工藝(yi)(yi)加強。為(wei)消除因冷塑性(xing)變形(xing)和(he)加工焊接導(dao)致的(de)內應(ying)力，可(ke)在650～830℃開展退(tui)火處(chu)(chu)理(li)(li)，退(tui)火后快速降溫(wen)(wen),便(bian)于快速地(di)經(jing)過(guo)475℃脆性(xing)溫(wen)(wen)度(du)范圍。奧氏體抗氧化鋼(gang)(gang)(gang)通常(chang)(chang)采(cai)(cai)用(yong)(yong)持(chi)續(xu)高溫(wen)(wen)淬火和(he)回火，以獲得(de)良(liang)好的(de)冷變形(xing)性(xing)。耐(nai)(nai)(nai)熱(re)鋼(gang)(gang)(gang)鑄(zhu)(zhu)件(jian)(jian)(jian)則先用(yong)(yong)持(chi)續(xu)高溫(wen)(wen)調質(zhi)熱(re)處(chu)(chu)理(li)(li)，之后在高于運(yun)用(yong)(yong)溫(wen)(wen)度(du)60～100℃條件(jian)(jian)(jian)下開展調質(zhi)熱(re)處(chu)(chu)理(li)(li),使機構(gou)(gou)防老化，同(tong)時(shi)析出第二相，以加強基體。耐(nai)(nai)(nai)熱(re)鋼(gang)(gang)(gang)鑄(zhu)(zhu)件(jian)(jian)(jian)多在鑄(zhu)(zhu)態下運(yun)用(yong)(yong)，也(ye)有(you)根(gen)據耐(nai)(nai)(nai)磨(mo)(mo)(mo)鋼(gang)(gang)(gang)的(de)種類采(cai)(cai)用(yong)(yong)對應(ying)的(de)熱(re)處(chu)(chu)理(li)(li)工藝(yi)(yi)的(de)。
