Experimental results show that steppedaging 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
However, steppedaging, which relaxes internal macro-stress under lower temperature then ages under higher temperature, can avoid longitudinal cracks effectively.
分级时效处理，低温下先让合金内部的宏观应力松弛，再在较高温度下时效，可有效地避免棒材纵向开裂。
3
Our country has entirely stepped to the rank of aging countries.