旋锻加工过程中钨的形变与组织的研究

来源期刊：中南大学学报(自然科学版)1984年第4期

论文作者：周美玲 左铁镛

文章页码：11 - 18

关键词：加工过程； 旋锻； 横向裂纹； 形变过程； 钨棒； 动态再结晶； 裂纹扩展； 显微组织； 表面裂纹； 扫描电镜

摘    要：本文研究了纯钨和掺杂钨的方坯在旋锻加工中,由于形变不均匀引起组织不均匀和横向裂纹的产生。用体视显微镜、扫描电镜等直接观测了形变过程中在方坯四个角部出现的大晶区及沿大晶区边缘形成的横向裂纹,讨论了裂纹产生的原因。研究了钨坯质量,旋锻加工工艺参数,如加热温度、形变量、中间再结晶处理等对钨棒显微组织及裂纹产生的影响,提出了控制形变与组织不均和裂纹扩展的某些措施,并被生产实践证实是有效的。

Abstract: This article investigates the causes of inhomogeneous structure and cross crupture which resulted from inhomogeneous deformation during swaging. The large grain areas, which appear in four angle areas of compact during deformation, the cross cruptures, which appear around the large grain areas, and the causes of the crupture are disscussed. The effect of the quality of compact, the parameters of swaging, such as swaging temperature, degree of deformation and recrystalization treatment during swaging, on the microscopic structure of tungsten rod and cruptures is also investigated. Based on these, some methods which may control inhomogeneous deformation, inhomogeneous structure and crupture expansion are proposed and they are proved to be effective in production practice.