问题:铁道部规定:轨底角允许有少量光斑,单个光斑面积允许8mm<sup...
Thursday, September 15, 2022
问题:闪光焊防止产生疏松缺陷的措施其中有()。A、增大半熔化区的宽度B、增加顶锻压力C、延长有电流顶锻时间D、减短无电流顶锻时间...
Sunday, January 21, 2024
Wednesday, March 20, 2024
问题:铝热反应中铁比重大沉于坩埚底部,铝氧化成氧化铝(Al<sub>2...
Tuesday, September 13, 2022
Tuesday, September 13, 2022
Saturday, February 11, 2023
问题:钢轨打磨时,其他人员应远离打磨()。A、左侧B、前方C、两侧和前方D、左侧和前方...
Saturday, March 18, 2023
问题:从金属学的角度来看,钢轨闪光焊后的调直应在()温度以上最合适。...
Tuesday, September 13, 2022
Thursday, September 15, 2022
Thursday, September 15, 2022
问题:钢轨铝热焊,若焊剂未被点燃,30s后方能打开坩锅盖检查。...
Tuesday, September 13, 2022
问题:钢轨闪光焊时,即使端面不存在氧化膜,但如果接口个别地方未形成共同...
Tuesday, September 13, 2022
Thursday, September 15, 2022
Friday, December 23, 2022
问题:铝热焊焊接记录包括时间、操作人员、钢轨类型、轨缝、焊剂反应时间、...
Tuesday, September 13, 2022
Saturday, March 4, 2023
问题:起道机应放在距铝热焊缝()以外,避免用起道机直接顶起铝热焊接头,并避免做一些冷弯直轨工作。A、0.5MB、1.5MC、1MD、2M...
Tuesday, July 11, 2023
问题:采用GAAS580/580型焊钢轨时的导通角预置值若太小,就会使连续烧化过程不稳定。...
Monday, January 1, 2024
问题:焊后钢轨热处理的最佳正火温度,对于闪光焊的接头是(940±10)...
Tuesday, September 13, 2022
Thursday, September 15, 2022