[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"$fi5JjBRpDBKofkD4BV2irfdL2jL65UA1QI80xIN09jmQ":3},{"answer":4,"createTime":5,"id":6,"options":7,"origin":12,"question":19,"related":20,"source":31,"type":32},[],"2023-06-08 10:37:29",52696783,[8,9,10,11],"砂型铸造","消失模铸造","自由锻","模锻",{"count":13,"courseId":14,"courseImg":15,"courseName":16,"workId":17,"workName":18},14,"6ff62bf2880a7c52e0e324d092cc1088","https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F5aa1e010016a00d72d96151e16aafd59.png","工程训练C","work_27576463","5 铸造章节作业","减速机壳体是灰口铸铁制造的,它的毛坯生产方式是()",[21,33,41,49,57,66,74,83,86,94],{"answer":22,"createTime":23,"id":24,"options":25,"question":30,"source":31,"type":32},[],"2023-06-06 17:46:31",49511418,[26,27,28,29],"冷隔","缩孔","裂纹","气孔","舂砂过紧,铸件可能产生()","v1",0,{"answer":34,"createTime":23,"id":35,"options":36,"question":40,"source":31,"type":32},[],49511419,[37,38,39],"增加透气性","增加强度","增加耐火性","大型型芯中放焦炭的目的之一是()",{"answer":42,"createTime":23,"id":43,"options":44,"question":48,"source":31,"type":32},[],49511420,[45,46,47],"-0.7~-0.3MPa","-0.08~-0.3MPa","-0.08~-0.02MPa","负压实型铸造真空度一般在()",{"answer":50,"createTime":23,"id":51,"options":52,"question":56,"source":31,"type":32},[],49511421,[53,54,55],"浇注温度太低","浇注温度太高","浇注速度太快","下列三种原因中,引起铸件缩孔的原因是()",{"answer":58,"createTime":23,"id":59,"options":60,"question":65,"source":31,"type":32},[],49511422,[61,62,63,64],"下型比上型紧实度要大","由操作者自定","上型比下型紧实度要大","均匀一致","舂砂时,上下砂型的型砂紧实度应该()",{"answer":67,"createTime":23,"id":68,"options":69,"question":73,"source":31,"type":32},[],49511423,[70,71,72],"修型时刷水过多","型砂强度太高","型砂退让性不足","下列三种情况中引起气孔的原因是()",{"answer":75,"createTime":23,"id":76,"options":77,"question":82,"source":31,"type":32},[],49511424,[78,79,80,81],"小的收缩性","好的流动性","小的偏析性","高的熔点","为了获得外形完整、轮廓清晰的铸件,要求铸造合金具有( )",{"answer":84,"createTime":5,"id":6,"options":85,"question":19,"source":31,"type":32},[],[8,9,10,11],{"answer":87,"createTime":5,"id":88,"options":89,"question":93,"source":31,"type":32},[],52696784,[28,90,91,92],"粘砂、硬皮","应力、变形","气孔、浇不足","砂型透气性差,除了会呛火外,还会产生()",{"answer":95,"createTime":96,"id":97,"options":98,"question":103,"source":31,"type":32},[],"2023-06-10 17:28:53",57087926,[99,100,101,102],"防止冲坏砂型","提高浇注时间","便于起模","增加铸件强度","铸造圆角的主要作用是()"]