Monday, October 23, 2023
有焰燃烧时,煤气中碳氢化合物易热解,有利于辐射传热。()...
Sunday, April 28, 2024
原始组织为细片状珠光体时,淬火加热时,比粗片状珠光体易过热。()...
Monday, September 12, 2022
含碳量为1%的过共析钢,在室温时或正常加热到700℃、770℃、...
Monday, September 12, 2022
Friday, January 6, 2023
Sunday, September 11, 2022
Sunday, April 28, 2024
Sunday, September 11, 2022
由于获得沉淀产生弥散强化所需要的钒,钛,铌等合金元素含量非常少,...
Sunday, September 11, 2022
某钢件要求淬硬层深度为0.5毫米,应选用的感应加热设备是()。...
Sunday, September 11, 2022
DRAPL钢卷打捆用捆带抗拉强度应在()kg/mm<sup>2<...
Sunday, September 11, 2022
当酸净化系统前的废酸罐的废酸量达到()%,由系统自动启动酸净化设...
Sunday, September 11, 2022
DRAPL在线轧机支持辊直径差≯()mm。A、0.01;B、0.20;C、0.30....
Monday, October 23, 2023
除含铁(Fe)和碳(C)外,还含有其它元素的钢就是合金钢。()...
Sunday, September 11, 2022
Sunday, September 11, 2022
Sunday, September 11, 2022
Monday, September 12, 2022
Sunday, February 25, 2024
Monday, September 12, 2022
Sunday, September 11, 2022