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。
However, stepped aging, which relaxes internal macro-stress under lower temperature then ages under higher temperature, can avoid longitudinal cracks effectively.
结果表明，高温淬火和分级淬火可使应力腐蚀断裂抚力k _ (ISCC)值得到明显提高。
Results show that both high temperature quenching and step quenching can apparently increase the stress corrosion cracking resistance K_ (ISCC).
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。
Experimental results show that stepped aging process not only enhances mechanical properties but also improves resistance against stress corrosion of the alloy.
采用rljw—2000型岩石三轴流变伺服仪，在分级加载条件下完成饱和粉砂质泥岩的三轴压缩应力松弛试验。
The stress relaxation test of saturated silty mudstone under triaxial compression is carried out on the rljw-2000 rock microcomputer-controlled rheology servo test system by step loading method.
分级加载时，当应力增加时声发射信号明显增多，应力稳定在低水平时基本不产生声发射信号；
During multi-stage loading process, acoustic emission signals increase obviously when the stress increases, and few acoustic emission signals are detected in the low stress stage.
主要内容包括采用分级堆填过程模拟风积黄土层的初始应力场；
The initial geological stress of loess was simulated by grading fill;
主要内容包括采用分级堆填过程模拟风积黄土层的初始应力场；
The initial geological stress of loess was simulated by grading fill;
应用推荐