镁处理和冷却速度对 GH3128合金中一次碳化物的影响
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第一作者：龚伟
通讯作者：王鹏飞
合写作者：张红亮,张宇,姜周华
发表刊物：材料研究与技术杂志
卷号：26
DOI码：10.1016/j.jmrt.2023.09.035
刊物所在地：巴西
摘要：The banded aggregation of primary carbides in GH3128 alloy severely affects the thermoplasticity and creep life of the alloy. Therefore, the effects of Mg treatment and cooling rate on primary carbides in the alloy were investigated in a resistance furnace. To differentiate the cooling rate, after alloying, the molten alloy per heat was air-cooled and furnace-cooled, respectively. The results indicate that neither Mg treatment nor increasing cooling rate can change the composition and type of primary carbides. However, as the Mg content increases from 0 to 0.0130%, the primary carbides are gradually dispersed and reduced in size and increased in number due to the refinement of dendrite structures by Mg treatment. Meanwhile, the irregular skeleton-like primary carbides are interrupted into relatively regular blocks and short bars. Compared with the furnace-cooled samples, the primary carbides in the air-cooled samples are finer in size because the refinement of dendrite structures inhibits the remote diffusion of carbide-forming elements. However, the rapid nucleation of primary carbides in the air-cooled samples results in an increase in their number. Consequently, compared with the furnace-cooled sample without Mg addition, the size of primary carbides in the air-cooled sample with 0.0130%Mg addition is reduced by about 76%, while the number of primary carbides is increased by 6.3 times.
项目来源：国家自然科学基金面上项目
论文类型：SCI JCR Q1
学科门类：工学
文献类型：JCR 一区
一级学科：冶金工程
页面范围：6731-6740
ISSN号：2238-7854
是否译文：否