Research on the rolling forming equipment and process of refractory metal seamless pipes,as well as the difficulties in the rolling process.This article takes molybdenum tube as an example to introduce the rolling equipment and process of a refractory metal seamless pipe.In response to the characteristics of refractory metal such as high melting point,high high-temperature strength,and poor plasticity of refractory metal at room temperature,it is necessary to heat it and roll it into a seamless pipe on a Pilger mill.The design of the heating system,the design of the rolling deformation zone,the selection of lubricants,and the selection of tooling materials were studied.After experiments,molybdenum pipes can be rolled into qualified pipes by heating them to a certain temperature and selecting a suitable rolling process.This has given us a further understanding of the rolling forming of seamless refractory metal pipes,and has pointed out the direction for the rolling forming of other refractory metal pipes.
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