扩径管

对于复合扩径管，由于奥氏体粗晶度的原因，也可以采用信号处理系统有效地降低噪音。

It may also use signal process system to decrease noise efficiently for compound expanded pipes , due to austenite rough grain size .

结果表明：5%左右扩径率的管接头具有较好的显微组织，是可回复应变量和回抱力的最佳组合，因此增强了管接头连接的可靠性。

The results indicate the sleeve possessing 5 percent ratio of expanding diameter holds the preferable microstructure , furthermore it is also the excellent combination of recoverable strain and holding strength . The connecting reliability of sleeve has been enhanced accordingly .

机械扩径是制造各种管筒形零件的有效方法之一。

Expanding is one of the effective methods for producing cylindrical parts .

此时的最优扩径结构长度上变短，对变刚度结构前部扩径薄壁管截短的影响进行分析。

At this time , the optimal expanding structure get shorter , so the influence of the truncated thin-walled tube is analysed .