问题:钛具有耐蚀性能是因为钛的表面能生成一层致密的氧化膜,对基材有保护...
Sunday, September 11, 2022
问题:用熔化极脉冲氩弧焊进行全位置焊接时,在控制焊缝成形方面不如普通熔化极氩弧焊。...
Friday, March 10, 2023
问题:06Cr19Ni10奥氏体不锈钢焊缝表面和近表面的缺陷采用磁粉探...
Sunday, September 11, 2022
问题:钛材焊接时的定位焊缝允许有少量的裂纹、气孔、夹钨等缺陷。...
Saturday, April 22, 2023
Sunday, September 11, 2022
问题:焊条电弧焊常用的运条方法有直线运条法、环形运条法、正锯齿运条法、...
Tuesday, September 13, 2022
Sunday, September 11, 2022
问题:气电立焊与焊条电弧焊相比焊接效率高、焊缝成形美观、劳动强度低...
Sunday, September 11, 2022
Sunday, September 11, 2022
Tuesday, September 13, 2022
Sunday, September 11, 2022
问题:塑性好的材料只会产生塑性断裂,不会产生脆性断裂。...
Wednesday, March 20, 2024
问题:气电立焊保护气体的作用是保护焊接区,并向焊缝渗合金...
Tuesday, September 13, 2022
Sunday, September 11, 2022
问题:钨极氩弧焊时, 焊丝的主要作用是作填充金属形成焊缝。...
Monday, October 3, 2022
Sunday, September 11, 2022
问题:B中碳钢的含碳量为()。 A、B、0.25%-0.6%C、0.25%D、0.6%...
Wednesday, March 20, 2024
Sunday, September 11, 2022
问题:气电立焊时,()不是造成焊缝成形不良的原因。A、网络电压不稳B、焊接环境湿度高C、送丝不稳定D、焊丝没有烘干...
Friday, November 10, 2023
Sunday, September 11, 2022