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钇抑制FeCrAl合金脆性的作用与合金中铬、钇含量的关系 被引量:8

Relations between the Actions of Yttrium InhibitingBrittleness and the Contents of Chromium andYttrium in FeCrAl Alloys
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摘要 Fe-(15~25)Cr-(4~5)Al合金在900~1300℃加热后发生高温脆化,脆化的温度-时间关系曲线与双曲线相似,在400~540℃时效后发生475℃脆化,脆化曲线由一次脆化的“双曲线”和二次脆化的“C曲线”组成.在含0.2%~1.4%Y的FeCrAl合金中,由于Y-Fe相粒子俘获碳原子的作用,高温脆化和475℃脆化受到强烈抑制。时效时a相析出过程的发展使合钇合金抵抗脆化的能力随铬含量升高而降低。合金的抗脆化性能随钇含量升高而提高,含0.3%~0.4%Y时最高。 High temperature embrittlements occur when Fe-(15-25)Cr-(4-5)Al alloys are heatedat 900 - 1300 . The temperature relation curves of the embrittlements are similar tohyperbola. 475 embrittlements after aging at 400-540. The embrittlement curves consistof two group curves-one of them is similar to'hyperbota'and another to'C curves'. In FeCrAlY alloys with 0.2% - 1.4%Y, the high temperature embrittlements and the 475 embrittlements are inhibited strongly, as a result of the action of Y-Fe phase capturing Carbon atoms in a-phase. However, owing to the development of Cr-rich a-phase precipitation process, the embrittlement-resistance inthe alloys with yttrium decreases with the increase in chromium content. The embrittlement-resistanceincreases with the increase of yttrium content and become the highest in the alloys with 0.2%-0.4%Y.
机构地区 包头稀土研究院
出处 《金属功能材料》 CAS 1999年第1期29-36,共8页 Metallic Functional Materials
基金 国家自然科学基金项目59271002
关键词 稀土 FeCrAl合金 脆化 rare earth, FeCrAl alloy, brittleness, yttrium, chromium
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