一种恢复热处理工艺对GH4145螺栓组织性能的影响
Effect of a recovery heat treatment on the microstructure and mechanical properties of GH4145/SQ bolt material
阎光宗，柯浩，徐雪霞，孔维刚
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作者单位：河北省电力研究院
中文关键字：镍基合金；恢复热处理；显微组织；力学性能
英文关键字：nickle-based alloy; recovery heat treatment; microstructure; mechanical properties
中文摘要：对运行后硬度值超标的镍基合金GH4145/SQ螺栓进行恢复热处理，并对恢复热处理前后的螺栓材料进行显微组织分析、力学性能检验，结果显示硬度值超标的螺栓塑韧性较差，恢复热处理后螺栓材料组织形貌及综合力学性能指标得到了明显改善。
英文摘要：A recovery heat treatment was used on the nickle-based alloy GH4145/SQ bolt whose hardness value was higher than the demand of the standard after service. The microstructure and mechanical properties of the bolt material before and after the recovery heat treatment were studied.The results show that the plastic and toughness of the bolt whose hardness value was higher than the demand of the standard was lower, and the microstructure and mechanical properties of the bolt matearial were improved obviously through the recovery heat treatment.