Treated with laser the changes in microstructure and hardness of cylinder sleeve of oil-wellpump for 45 steel were studied.
本文研究了45钢抽油泵缸套激光热处理后的显微组织和硬度的变化。
2
There are a series of problems in batch production of plating chromium for lining inner bores of input tube in oilwellpump such as parameter choice, clamp design, bath care and adjust.