The piercing process of seamless steel tube is a hot working process, the distribution of plug temperature is very important to its service life.
无缝钢管的穿孔过程是一个热加工过程，顶头的温度分布对于其寿命至关重要。
The experimental investigation of high- temperature alloy piercing performances is made by using the hot torsion test and coning test;
采用热扭转试验和锥形试验的方法对高温合金的穿孔性能进行了试验研究；
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