The test of sulphurized tufftride process for treating the hot piercing punch for steel pipes is introduced.
介绍了钢管热冲孔凸模硫氮碳共渗工艺试验。
The rational process for producing the steel is recommended on the basis of analyzing the emergence and developing mechanism of cracks in shells of the steel during hot piercing.
分析了热穿孔过程中毛管裂纹的产生及扩展机理。推荐了生产该钢种的合理工艺。
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；
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 production process and its features of piercing plug by precision hot-die-forging are detailed.
本文介绍了精密热模锻穿孔顶头的生产工艺及工艺特点。
The production process and its features of piercing plug by precision hot-die-forging are detailed.
本文介绍了精密热模锻穿孔顶头的生产工艺及工艺特点。
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