锻压技术

粘性介质性能及对不锈钢SUS304筒坯外压稳定性的影响

英文标题：Influence of viscous medium properties on tube-compression stability of

作者：高铁军刘洋陈鹏刘占军王忠金

分类号：

出版年,卷(期):页码：2015,40(1):17-20

摘要：

选用分子量范围为 (30～70)×104 g·mol-1的五种不同粘性介质进行室温条件下的流变特性和压缩性能试验，确定了不同分子量粘性介质的剪切粘度、剪应变率与剪应力关系和体积模量，在此基础上进行了不锈钢SUS304筒坯粘性介质外压稳定试验。研究结果表明，室温条件下，随着介质分子量的增加，粘性介质的粘度和速率敏感性增大，体积模量降低；选取分子量较大的粘性介质，有助于提高不锈钢SUS304筒坯的外压稳定性。

Experiments of rheological behavior and compression performance of five kinds of viscous medium with molecular weight of (30-70)×104 g·mol-1 at usual room temperature were carried out. Shear viscosity, relationship between shear strain rate and shear stress and bulk modulus with different kinds of viscous medium were obtained. On that basis, experiments of tube-compression stability of stainless steel SUS304 were conducted. The results show that with the increasing of molecular weight, viscosity and rate sensitivity of the viscous medium increase correspondingly at room temperature bulk modulus decreases. The viscous medium of large molecular weight is selected to improve its viscosity, rate sensitivity, bulk modulus, which is desirable for the stability of stainless steel SUS304.

基金项目：

国家自然科学基金资助项目 (51205260) ；辽宁省教育厅资助项目(L2012046)

高铁军 (1977-)，男，博士，副教授

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