[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"$fUrxviRBHw1TZLk_Vhh4VhEYqngfOEiV51nbq3igS_FI":3},{"answer":4,"createTime":5,"id":6,"options":7,"origin":12,"question":19,"related":20,"source":27,"type":28},[],"2026-01-20 13:43:16",314913188,[8,9,10,11],"布氏硬度","洛氏硬度","维氏硬度","肖氏硬度",{"count":13,"courseId":14,"courseImg":15,"courseName":16,"workId":17,"workName":18},56,"53e1d2ef4961cca8eea3e23969ad2cb9","https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F03a579384a6dc297c89809b582fcc767.png","默认课程","work_49384673","第三次作业","用金钢石圆锥体作为压头,并以压痕深度计算硬度值的是____",[21,29,35,44,50,59,62,67,76,81],{"answer":22,"createTime":5,"id":23,"options":24,"question":26,"source":27,"type":28},[],314913183,[8,9,10,25],"努氏硬度","主要用于主要用于原材料检验、测定的硬度方法是____","v1",0,{"answer":30,"createTime":5,"id":31,"options":32,"question":34,"source":27,"type":28},[],314913184,[8,9,10,33],"里氏硬度","主要用于成品或较薄工件的硬度测定方法是____",{"answer":36,"createTime":5,"id":37,"options":38,"question":43,"source":27,"type":28},[],314913185,[39,40,41,42],"Φ1.588mm钢球","120°金刚石圆锥","140°金刚石圆锥","136°金刚石圆锥","洛氏硬度中的符号HRC所用的测头是____",{"answer":45,"createTime":5,"id":46,"options":47,"question":49,"source":27,"type":28},[],314913186,[39,40,41,48],"136°的正四棱锥金刚石","维氏硬度所用的测头是____",{"answer":51,"createTime":5,"id":52,"options":53,"question":58,"source":27,"type":28},[],314913187,[54,55,56,57],"HBW","HRC","HV","HR","在测量铸铁工件的硬度时,常用硬度测试方法的表示符号是____",{"answer":60,"createTime":5,"id":6,"options":61,"question":19,"source":27,"type":28},[],[8,9,10,11],{"answer":63,"createTime":5,"id":64,"options":65,"question":66,"source":27,"type":28},[],314913189,[8,9,10,33],"钢制工件淬火后,测试硬度的适宜方法是____",{"answer":68,"createTime":5,"id":69,"options":70,"question":75,"source":27,"type":28},[],314913190,[71,72,73,74],"软硬","塑性变形","弹性变形","塑性","硬度是衡量金属材料____程度的指标,是指金属材料在静载荷作用下抵抗表面局部变形,特别是塑性变形、压痕、划痕的能力",{"answer":77,"createTime":5,"id":78,"options":79,"question":80,"source":27,"type":28},[],314913191,[8,9,10,25],"主要用于薄板材料及材料表层的硬度测定的硬度方法是____",{"answer":82,"createTime":5,"id":83,"options":84,"question":89,"source":27,"type":28},[],314913192,[85,86,87,88],"越小","越大","不一定","不变","冲击吸收能量的值越大,材料的韧性____,越可以承受较大的冲击载荷"]