[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"$fciJ5ZrULiupobCXpcyagSUu3mMfprSe_OvdPvSQQLqU":3},{"answer":4,"createTime":5,"id":6,"options":7,"origin":12,"question":16,"related":17,"source":27,"type":28},[],"2026-03-16 21:44:21",324150149,[8,9,10,11],"15Cr","20Cr","20CrMnMo","60Si2Mn",{"courseId":13,"courseImg":14,"courseName":15},"d60a280d85c356ec43f773b8c614c86f","https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fa8d3e7105e55b7bf3976bd7ea3ca285d.png","机械工程材料","制造高应力下工作的曲轴可选用",[18,29,38,46,52,55,61,69,78,83],{"answer":19,"createTime":5,"id":20,"options":21,"question":26,"source":27,"type":28},[],324150145,[22,23,24,25],"15Cr、20Cr","20CrMnTi、20CrMnMo","12Cr2Ni4A、18Cr2Ni4WA","40Cr、42CrMo","下列钢中不属于渗碳钢的是","v1",0,{"answer":30,"createTime":5,"id":31,"options":32,"question":37,"source":27,"type":28},[],324150146,[33,34,35,36],"15Cr、18Cr2Ni4WA、20CrMnTi","18Cr2Ni4WA、20Cr、20CrMnTi","20Cr、20CrMnMo、18Cr2Ni4WA","18Cr2Ni4WA、20CrMnMo、15Cr","按淬透性由小到大排列正确的是",{"answer":39,"createTime":5,"id":40,"options":41,"question":45,"source":27,"type":28},[],324150147,[42,43,9,44],"15","18Cr2Ni4WA","40Cr","活塞销的壁厚小于10mm,采用渗碳工艺提高耐磨性,合适的材料是",{"answer":47,"createTime":5,"id":48,"options":49,"question":51,"source":27,"type":28},[],324150148,[8,43,50,44],"20CrMnTi","制造汽车或拖拉机变速箱齿轮可选用",{"answer":53,"createTime":5,"id":6,"options":54,"question":16,"source":27,"type":28},[],[8,9,10,11],{"answer":56,"createTime":5,"id":57,"options":58,"question":60,"source":27,"type":28},[],324150150,[42,9,59,11],"W18Cr4V","制造承受较大弯曲应力的凸轮轴可选用",{"answer":62,"createTime":5,"id":63,"options":64,"question":68,"source":27,"type":28},[],324150151,[65,66,50,67],"40钢、45钢","40Cr钢、42CrMo钢","38CrMoAl","下列钢中不属于调质钢的是",{"answer":70,"createTime":5,"id":71,"options":72,"question":77,"source":27,"type":28},[],324150152,[73,74,75,76],"45钢淬火+中温回火","45钢淬火+低温回火","40Cr调质处理","45钢调质处理","一个直径为20mm的轴,要求抗拉强度大于700Mpa且综合力学性能较好.从经济角度考虑,同时又能满足性能要求,比较合适的选材和热处理工艺是",{"answer":79,"createTime":5,"id":80,"options":81,"question":82,"source":27,"type":28},[],324150153,[73,74,75,76],"一个直径为70mm的轴,要求抗拉强度大于900Mpa且综合力学性能较好,比较合适的选材和热处理工艺是",{"answer":84,"createTime":5,"id":85,"options":86,"question":90,"source":27,"type":28},[],324150154,[76,87,88,89],"40CrNiMo加热到单相A区,水冷,最后高温回火","40CrMnMo加热到A区,油冷,最后高温回火","45钢加热到A区,水冷,最后高温回火","一个直径为200mm的轴,要求综合力学性能好,比较合适的选材和热处理工艺是"]