35crmo圓鋼，有(you)(you)(you)很高(gao)(gao)的(de)靜力強度(du)(du)、沖擊韌(ren)性(xing)(xing)(xing)(xing)及較高(gao)(gao)的(de)疲勞(lao)極限，淬(cui)透性(xing)(xing)(xing)(xing)較40Cr高(gao)(gao)，高(gao)(gao)溫(wen)(wen)下有(you)(you)(you)高(gao)(gao)的(de)蠕變(bian)強度(du)(du)與持(chi)久強度(du)(du)，長(chang)期(qi)工作(zuo)溫(wen)(wen)度(du)(du)可達(da) 500℃;冷(leng)變(bian)形(xing)時塑性(xing)(xing)(xing)(xing)中(zhong)等，焊(han)(han)接(jie)性(xing)(xing)(xing)(xing)差。低(di)溫(wen)(wen)至(zhi)-110攝氏度(du)(du)，并具有(you)(you)(you)高(gao)(gao)的(de)靜強度(du)(du)、沖擊韌(ren)度(du)(du)及較高(gao)(gao)的(de)疲勞(lao)強度(du)(du)、淬(cui)透性(xing)(xing)(xing)(xing)良好，無過熱(re)(re)(re)傾向，淬(cui)火(huo)(huo)變(bian)形(xing)小，冷(leng)變(bian)形(xing)時塑性(xing)(xing)(xing)(xing)尚可，切削(xue)加工性(xing)(xing)(xing)(xing)中(zhong)等，但(dan)有(you)(you)(you)第一類回(hui)火(huo)(huo)脆性(xing)(xing)(xing)(xing)，焊(han)(han)接(jie)性(xing)(xing)(xing)(xing)不好，焊(han)(han)前需預(yu)熱(re)(re)(re)至(zhi)150~400攝氏度(du)(du)，焊(han)(han)后(hou)(hou)熱(re)(re)(re)處(chu)理(li)以(yi)消(xiao)除應力，一般在(zai)調質處(chu)理(li)后(hou)(hou)使(shi)用，也可在(zai)高(gao)(gao)中(zhong)頻表(biao)面淬(cui)火(huo)(huo)或淬(cui)火(huo)(huo)及低(di)、中(zhong)溫(wen)(wen)回(hui)火(huo)(huo)后(hou)(hou)使(shi)用。

　　什么是(shi)抗拉強度?

　　抗拉(la)(la)(la)強度是(shi)(shi)圓(yuan)(yuan)鋼(gang)由均勻(yun)(yun)(yun)塑性(xing)變(bian)(bian)形(xing)(xing)向局部集(ji)中(zhong)塑性(xing)變(bian)(bian)形(xing)(xing)過渡的(de)臨界值(zhi)，也是(shi)(shi)圓(yuan)(yuan)鋼(gang)在(zai)靜拉(la)(la)(la)伸條(tiao)件下的(de)最大(da)承載(zai)能(neng)力(li)。對于塑性(xing)材(cai)料，它表征材(cai)料最大(da)均勻(yun)(yun)(yun)塑性(xing)變(bian)(bian)形(xing)(xing)的(de)抗力(li)，拉(la)(la)(la)伸試樣在(zai)承受最大(da)拉(la)(la)(la)應(ying)力(li)之前，變(bian)(bian)形(xing)(xing)是(shi)(shi)均勻(yun)(yun)(yun)一致的(de)，但超出之后，圓(yuan)(yuan)鋼(gang)開(kai)始出現縮頸(jing)現象，即產生集(ji)中(zhong)變(bian)(bian)形(xing)(xing);對于沒(mei)有(或很小)均勻(yun)(yun)(yun)塑性(xing)變(bian)(bian)形(xing)(xing)的(de)脆性(xing)材(cai)料，它反映了材(cai)料的(de)斷裂抗力(li)。