耐熱鋼鑄件應該滿足以下條件
2022-10-27 15:22:42
1.較(jiao)好的耐熱鋼(gang)鑄件(jian)耐溫(wen)(wen)性能(neng)(neng)(neng)一般在高(gao)溫(wen)(wen)下承載工件(jian)工作服,都(dou)要(yao)求具(ju)有(you)較(jiao)好的耐溫(wen)(wen)性能(neng)(neng)(neng)和一定的耐腐蝕性,可(ke)防止很嚴(yan)重(zhong)的被氧化(hua),有(you)的則規定能(neng)(neng)(neng)抗(kang)滲碳等(deng)。為(wei)了(le)實現這些要(yao)求,一般都(dou)從材料選(xuan)擇上(shang)加以考慮(lv),因此,材料的成本較(jiao)高(gao)。
2.一定持續高(gao)溫(wen)(wen)強(qiang)度持續高(gao)溫(wen)(wen)強(qiang)度就(jiu)是指(zhi)運載(zai)工(gong)件工(gong)作服在(zai)高(gao)溫(wen)(wen)下(xia)長時間加(jia)(jia)熱的(de)情形下(xia),能夠(gou)承載(zai)被加(jia)(jia)熱工(gong)件凈重,而且工(gong)作服不發(fa)生比較嚴(yan)重變形乃至松掉。工(gong)作服持續高(gao)溫(wen)(wen)強(qiang)度靠(kao)材料(liao)及工(gong)作服的(de)構造保證(zheng),那如果(guo)結構太(tai)強(qiang),則凈重大(da),吸收熱量多(duo),使工(gong)件單位能耗增(zeng)加(jia)(jia),加(jia)(jia)熱時間延長,導致成(cheng)本(ben)上(shang)升。
3.較低的(de)耐熱(re)(re)鋼鑄件(jian)材(cai)料(liao)與(yu)制(zhi)(zhi)作成(cheng)本熱(re)(re)處理(li)工(gong)(gong)裝(zhuang)(zhuang)是一(yi)種易(yi)耗配件(jian),主要的(de)無效(xiao)形式是高(gao)溫氧化減薄(bo),強度比較嚴重下降(jiang)。制(zhi)(zhi)作工(gong)(gong)作服常見電(dian)焊、鑄造的(de)辦(ban)法。控制(zhi)(zhi)工(gong)(gong)裝(zhuang)(zhuang)材(cai)料(liao)與(yu)工(gong)(gong)裝(zhuang)(zhuang)制(zhi)(zhi)作成(cheng)本,是控制(zhi)(zhi)熱(re)(re)處理(li)工(gong)(gong)藝成(cheng)本至(zhi)關重要方面(mian)。
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