采用光学显微镜(OM)、扫描电镜(SEM)分析了Haynes230合金铸态和均匀化处理后的显微组织和元素偏析规律,并建立了偏析指数与均匀化处理参数的关系;通过粉末X射线衍射确定了铸态合金碳化物的类型.分析结果表明:铸态Haynes230合金存在着严重的枝晶偏析,在1200 ℃均匀化处理24 h后,合金的组织和成分达到均匀,枝晶偏析得以消除.
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