小尺寸GH698合金轧制棒材组织和性能的控制研究  

Microstructure and Property Control of Small Rolling Bars of GH698 Alloy

作　　者：李凤艳[1] 王志刚[1] 吴贵林[1] 潘慧君[1] 

机构地区：[1]抚顺特殊钢股份有限公司技术中心,辽宁抚顺113001

出　　处：《物理测试》2014年第3期1-3,共3页Physics Examination and Testing

摘　　要：针对GH698合金小尺寸轧制棒材（≤Φ20mm）的750℃高温拉伸塑性不合格问题进行了深入的研究,结果表明：采用真空感应冶炼加真空自耗重熔的Φ180mm锭,将Mg的质量分数控制在0.004%≤w（Mg）≤0.008%;轧制变形量控制在50%~80%,加热温度控制在1140~1180℃之间,得到标准热处理后2~6级完全再结晶的晶粒,试样高温拉伸塑性一次检验合格。The problem of unqualified tensile property of small rolling bars of GH698 alloy （≤ φ 20 mm） at 750℃ was deeply investigated. The results show that for φ 180 mm ingots melted with VIM＋VAR, Mg content is controlled between 0.004% and 0.008%; the rolling deformation is controlled between 50% and 80%, and heating temperature is controlled between 1 140-1 180 ℃, the alloy can get complete recrystallized grains of grade 2-6 after standard heat treatment, and the elevated temperature tensile property of the samples passes the initial test.

关 键 词：变形量 晶粒度 高温拉伸试验 

分 类 号：TG339[金属学及工艺—金属压力加工]