【判断题】【消耗次数:1】
过共析钢的正常淬火一般均为不完全淬火。
正确
错误
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相关题目
【单选题】 过共析钢的正常淬火加热温度应该选择在()。
①  Ac1+30--50℃
②  Ac3+30--50℃
③  Accm+30--50℃
④  T再+30--50℃
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①  正确
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【单选题】 对过共析钢不能进行下列哪种退火处理?()
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③  等温退火
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①  正确
②  错误
【单选题】 过共析钢在常温下的晶体组织主要为( )。
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④  奥氏体
【单选题】 过共析钢因过热而析出网状渗碳体组织时,可用下列哪种工艺消除?()
①  完全退火
②  等温退火
③  球化退化
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【单选题】 共析钢在常温下的晶体组织为( )。
①  铁素体和珠光体
②  珠光体
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【判断题】 弹簧钢的最终热处理应是淬火+低温回火。
①  正确
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【判断题】 高速钢淬火后经回火可进一步提高其硬度。
①  正确
②  错误
【判断题】 我国不承认不完全收养
①  正确
②  错误
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【单选题】 4. David watched her car until it ____ from view.
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②  I had heard of
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