[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"$f9bol9zirA_RUIg5610Mk1GfUWSA0adlkittX6OeCGj8":3},{"id":4,"source":5,"question":6,"options":7,"answer":12,"related":13,"type":24,"origin":113,"createTime":31},161263140,"v1","板条状马氏体的亚结构是()",[8,9,10,11],"孪晶","浮凸","共格","位错",[],[14,27,32,43,52,63,73,83,92,103],{"id":15,"source":5,"question":16,"options":17,"answer":22,"related":23,"type":24,"origin":25,"createTime":26},161263139,"高碳钢淬火后回火时,随回火温度升高其()",[18,19,20,21],"强度硬度提高,塑性韧性下降","强度韧性提高,塑性韧性下降","强度韧性下降,塑性硬度提高","强度硬度下降,塑性韧性提高",[],[],0,null,"2024-10-20T21:18:32+08:00",{"id":4,"source":5,"question":6,"options":28,"answer":29,"related":30,"type":24,"origin":25,"createTime":31},[8,9,10,11],[],[],"2024-10-20T15:12:00+08:00",{"id":33,"source":5,"question":34,"options":35,"answer":40,"related":41,"type":24,"origin":25,"createTime":42},161263141,"钢件出现下述哪种缺陷时,难以用热处理来消除",[36,37,38,39],"纤维组织","网状渗碳体","晶内偏析","晶粒粗大",[],[],"2024-10-20T21:18:29+08:00",{"id":44,"source":5,"question":45,"options":46,"answer":50,"related":51,"type":24,"origin":25,"createTime":31},161263142,"各种金属工具材料在淬火后进行的回火应是()",[47,48,49],"中温回火","高温回火","低温回火",[],[],{"id":53,"source":5,"question":54,"options":55,"answer":60,"related":61,"type":24,"origin":25,"createTime":62},161263143,"合金元素对奥氏体晶粒长大的影响是()",[56,57,58,59],"均强烈促进奥氏体晶粒长大","无影响","均强烈阻止奥氏体晶粒长大","上述说法都不全面",[],[],"2024-10-20T21:18:36+08:00",{"id":64,"source":5,"question":65,"options":66,"answer":71,"related":72,"type":24,"origin":25,"createTime":62},161263144,"下列诸材料中淬透性最好的是()",[67,68,69,70],"GCr15","40Cr","20CrMnTi","Q235",[],[],{"id":74,"source":5,"question":75,"options":76,"answer":81,"related":82,"type":24,"origin":25,"createTime":62},161263145,"钢的淬透性主要决定于其()",[77,78,79,80],"合金元素含量","冷却速度","碳含量","过冷度",[],[],{"id":84,"source":5,"question":85,"options":86,"answer":90,"related":91,"type":24,"origin":25,"createTime":31},161263146,"哪一种淬火介质在淬火时造成的组织应力小,引起变形开裂的倾向小()",[87,88,89],"水","油","盐的水溶液",[],[],{"id":93,"source":5,"question":94,"options":95,"answer":100,"related":101,"type":24,"origin":25,"createTime":102},161263147,"马氏体是()在α–Fe中的过饱和固溶体",[96,97,98,99],"GP区","碳","铁","溶质",[],[],"2024-10-20T21:18:30+08:00",{"id":104,"source":5,"question":105,"options":106,"answer":111,"related":112,"type":24,"origin":25,"createTime":62},161263148,"可逆回火脆性的温度范围是.()",[107,108,109,110],"150℃~200℃","400℃~500℃","250℃~400℃","500℃~650℃",[],[],{"courseName":114,"courseImg":115,"workName":116,"workId":117,"count":118,"courseId":119},"工程材料","https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fed0dfdd44ab77f44df7c54638ab2faa9.png","07钢的热处理与相变强化","work_37530580",107,"364eed3d08f8b902fe7588fdbed2fd14"]