钼合金顶头制备技术研究进展

Research progress on the preparation technology of molybdenum alloy piercing plug

钼合金顶头是生产不锈钢等高合金含量无缝钢管的关键工具之一。从钼合金顶头的化学成分、掺杂工艺、粉体粒度和烧结工艺等方面入手,研究影响顶头力学性能和使用寿命的主要因素。分析了不同合金元素及添加方式对合金强韧化机理的影响,讨论了粉体掺杂工艺、粉体粒度分布及控制对于后续制备过程中获得致密、均一组织的影响,对比了传统烧结工艺、活化烧结技术和新型烧结技术的优缺点,并为今后烧结成形工艺的研究提供了一些新思路。

Molybdenum alloy piercing plug is one of the key tools in manufacturing the seamless tubular products using the high alloying steels such as stainless steels.The main influential factors affecting the mechanical properties and service life of the molybdenum alloy piercing plug were studied from the chemical composition,doping process,particle size,and sintering process.Firstly,the effects of alloying elements and adding method on the strengthening and toughening mechanism of the alloys were analyzed.Then,the influence of the powder doping processes and the particle size distribution and control on obtaining the compact homogeneous tissue in the subsequent preparation process was discussed.Finally,the advantages and disadvantages of the traditional sintering process,activated sintering technology,and new sintering technology were compared and analyzed,and some new ideas were provided for the future research of sintering forming technology.