[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"$fJ8ph125Bq3NIQzsAHWHY-ylMjx_ABRISeSyr3YZSFbE":3},{"answer":4,"createTime":5,"id":6,"options":7,"origin":12,"question":18,"related":19,"source":29,"type":48},[],"2023-05-10 20:03:39",12311129,[8,9,10,11],"莱氏体的含碳量是4.3%","亚共晶白口铸铁的平衡组织是莱氏体Ld,莱氏体Ld的相组成物是A+ Fe3C","室温下变态莱氏体的相组成物是F+Fe3C","室温下变态莱氏体的相组成物是P+Fe3C +Fe3CII",{"courseId":13,"courseImg":14,"courseName":15,"workId":16,"workName":17},"1000006964","https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F002982ab7e4e9dc952bb725532ff7174.jpg","材料科学基础（中南大学）","6887221","材料科学基础（中南大学）教程考试","依据Fe-Fe3C相图,说法正确的有( )",[20,31,39,49,54,57,65,73,82,87],{"answer":21,"createTime":5,"id":22,"options":23,"question":28,"source":29,"type":30},[],12311103,[24,25,26,27],"\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F923ab895ca5bd5d11d4338da439dc834.png\">","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fba884cbe97868711632a9ca3047ccbe0.png\">","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fc8d6720ffb1e75385303698669308047.png\">","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fbee6f891a287db3a78c79776d531faff.png\">","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F7a271c33f45a5a1a0ef3a7d0169a435f.png\">","v2",0,{"answer":32,"createTime":5,"id":33,"options":34,"question":37,"source":29,"type":38},[],12311104,[35,36],"对","错","金属经过铸造后加热到一定温度就会发生回复再结晶过程",3,{"answer":40,"createTime":5,"id":41,"options":42,"question":47,"source":29,"type":48},[],12311105,[43,44,45,46],"L1→a+L2叫偏晶反应","b→L+a称为熔晶转变","反应a1→a2+b称为偏析反应","a+b®g称为包析反应","在二元相图中,以下反应正确的是( )",1,{"answer":50,"createTime":5,"id":51,"options":52,"question":53,"source":29,"type":38},[],12311113,[35,36],"再结晶刚结束的晶粒大小,与该金属在再结晶加热前的冷加工变形量没有关系",{"answer":55,"createTime":5,"id":6,"options":56,"question":18,"source":29,"type":48},[],[8,9,10,11],{"answer":58,"createTime":5,"id":59,"options":60,"question":18,"source":29,"type":48},[],12311135,[61,62,63,64],"共析反应后的生成物称为珠光体P,含碳量是0.77%","珠光体是由铁素体F和渗碳体组成的两相混合物","在常温下,亚共析钢的平衡组织是P+F","在常温下,过共析钢的平衡组织是P+Fe3C",{"answer":66,"createTime":5,"id":67,"options":68,"question":18,"source":29,"type":48},[],12311136,[69,70,71,72],"含碳量小于0.0218%的合金称为钢,大于4.3%为铸铁","铁碳合金室温平衡组织均由P和Fe3C两个基本相组成","根据溶质原子的位置,奥氏体其晶体结构是FCC,是间隙固溶体,铁素体是间隙固溶体,其晶体结构是BCC晶体结构","合金平衡结晶时,奥氏体的最大含碳量是2.11%",{"answer":74,"createTime":5,"id":75,"options":76,"question":81,"source":29,"type":30},[],12311137,[77,78,79,80],"从低浓度区域向高浓度区域","从高浓度区域向低浓度区域","从高温区域向低温区域","从低温区域向高温区域","逆扩散(上坡扩散)是( )进行扩散",{"answer":83,"createTime":5,"id":84,"options":85,"question":86,"source":29,"type":38},[],12311145,[35,36],"获得金属的非晶合金的基本方法是快速冷却",{"answer":88,"createTime":5,"id":89,"options":90,"question":91,"source":29,"type":38},[],12311159,[35,36],"无序固溶体转变为有序固溶体时,合金性能变化的一般规律是强度和硬度提高,塑性降低,导电性降低"]