不锈钢分层实体扩散焊制造中的变形控制  

Deformation Control in Stainless Steel Laminated Object Manufacturing by Diffusion Bonding

作　　者：李京龙[1] 孙福[1] 熊江涛[1] 张赋升[1] 

机构地区：[1]西北工业大学摩擦焊接陕西省重点实验室,陕西西安710072

出　　处：《铸造技术》2006年第11期1235-1237,共3页Foundry Technology

摘　　要：应用真空扩散焊工艺,采用层板不锈钢作造型,进行分层实体制造。结果表明,扩散焊分层实体制造中,容易发生多种变形缺陷。控制焊接温度为850℃,保证70%左右的焊合率,可以在整体上体现实体块材的力学性能,进而抑制宏观热变形;同时,又可以抑制过高焊接温度所带来的升温热变形积累,从而减小表面塌陷变形或断裂。控制焊接压力为2MPa,可以在保证焊合率的基础上,抑制错边缺陷,并避免在过大压力下的实体伸长变形量超差;焊后使用5MPa冲击顶锻压力,可以在一定程度上释放焊后残余热应力,并进而抑制宏观变形量。Stainless steel laminated object manufacturing （LOM） by vacuum diffusion bonding process was studied experimentally. The results showed that a variety of thermal deformations is easy to form in products in the process. With about 70 % of bonding ratio and a bonding temperature of 850℃, the sample can present the performances of the bulk material and macro thermal deformations can be suppressed; at the same time, accumulated thermal deformations thus surface sink and rupture due to higher bonding temperature can be reduced. With a bonding pressure of 2 MPa sufficient bonding ratio can be ensured, thus mismatch defects can be suppressed and over elongated deformation due to higher bonding pressure can be avoided An impact pressure of 5 MPa applied subsequently during cooling down can release residual thermal stress to some extent therefore further control macro deformation.

关 键 词：真空扩散焊 分层实体制造 不锈钢 热变形 

分 类 号：TG457.11[金属学及工艺—焊接]