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不锈钢管热挤压用玻璃垫形状研究
英文标题:Research on the shape of glass pad for hot extrusion of stainless steel tube
作者:于志强 拓雷锋 周根树 
单位:山西太钢不锈钢股份有限公司 
关键词:不锈钢管 热挤压 玻璃垫 
分类号:
出版年,卷(期):页码:2014,39(10):122-127
摘要:

在不锈钢热挤压中玻璃是常用的润滑剂,玻璃粉末被用在热挤压坯料的内、外表面润滑,采用玻璃粉末和玻璃水混合而制成的玻璃垫被用在热挤压过程中的持续润滑,玻璃垫主要起到了隔热、保护挤压模和减小挤压力的作用。玻璃垫的润滑效果直接影响到挤压制品表面质量、工模具磨损程度、挤压力大小以及挤压管前端尺寸稳定性和切头长度。借助60 MN油压卧式挤压机对外径和壁厚之比为12.7的不锈钢管进行热挤压试验,并对其使用的玻璃垫形状进行优化设计。通过玻璃垫形状的优化设计,避免了挤压制品前端叉口现象,缓解了挤压管前端偏壁和工模具磨损,减少了玻璃粉用量,降低了挤压力峰值。

In the process of extrusion for stainless steel, the glass is a common lubricant. The glass powder is used to lubricate the inner and outer area of hot billet. The glass pad made of glass power and glass water is used to lubricate constantly in the extrusion process and plays an important role in heat insulation, protecting extrusion die and decreasing extrusion force. The surface quality of extrusion products, the attrition rate of extrusion die, the extrusion force, the front size stability of extrusion tube and the length of cutting end are directly affected by the lubrication effect of glass pad. The hot extrusion experiment of stainless steel tube whose ratio of outer diameter to wall thickness is 12.7 was conducted by the 60 MN hydraulic horizontal extruder, and the shape of glass pad used in the experiment was optimized to design. Through optimization of the glass pad, the front fork of extrusion products is avoided, the front size deviation of tube and abrasion of the extrusion die are reduced, the glass powder quantity is decreased, and the extrusion peak stress is fallen.

基金项目:
国家自然科学基金资助项目(51305228)
作者简介:
于志强(1980-),男,博士研究生,工程师
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