Experimental results show that stepped aging process not only enhances mechanical properties but also improves resistance against stress corrosion of the alloy.
试验结果表明，分级时效工艺在提高合金机械性能的同时，还能使合金抗应力腐蚀性能得到明显改善。
2
The cylinders are made of super-hard metal(plunger hardness above HRC55), and sealed with low-resistancestepped gaskets, giving no oil-leakage, long service life and low maintenance cost.