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近年,高合金无缝钢管的需求增大,现在已经开发了适用曼内斯曼式穿孔法的高合金无缝钢管的生产技术。但是,如用曼内斯曼式穿孔机穿孔轧制以不锈钢为代表的高合金钢时,其轧辊、工具会有明显的磨损。现在用实验穿孔机进行实验,可以解释出引起高合金钢管坯穿孔轧制时的轧辊、导板以及顶头的高温、高负荷损耗的机理,并采取不同的技术措施。(1)将碳化硅细粉通过高分子聚合,在水中使其分散的防滑剂。(2)用混合水溶液(硼酸和弱碱性保护膜形成剂)及辅助水溶液(弱酸性的)经中和反应,使导板表面形成润滑保护膜,防热粘连的润滑技术。(3)开发了含C 0.3%、Cr0.5%、Ni1%％、No0.5%、Mo1.5%、W3%、Co1%的新成分系列顶头,已在生产中得到应用。
In recent years, the demand for high-alloy seamless steel pipes has increased, and the production technology of high-alloy seamless steel pipes suitable for Mannesmann perforation has been developed. However, when a high-alloy steel represented by stainless steel is pierced and rolled by a Mannesmann punch, the roll and the tool have obvious wear. Experimenting with experimental piercing machine now can explain the mechanism of high temperature and high load loss caused by roll, guide plate and head during piercing and rolling of high alloy steel tube blank and adopt different technical measures. (1) The silicon carbide powder by polymer polymerization, to make it dispersed in water slip agent. (2) With the mixed solution of water (boric acid and weak alkaline protective film forming agent) and auxiliary aqueous solution (weak acid) by the neutralization reaction, the guide plate surface lubrication protective film, heat-resistant adhesive lubrication technology. (3) Developed a new series of plugs with C 0.3%, Cr 0.5%, Ni 1 %%, No 0.5%, Mo 1.5%, W3%, Co 1%, which have been applied in production.