稀土元素Y对K38G高温合金 800℃恒温氧化行为的影响

1.天津大学,化工学院,天津,300072;沈阳化工学院,沈阳,110142

2.天津大学,化工学院,天津,300072

3.中国科学院金属研究所,金属腐蚀与防护国家重点实验室,沈阳,110016

EFFECT OF REACTIVE ELEMENT YTTRIUM ON OXIDATION BEHAVIOR OF K38G SUPERALLOY AT 800 ℃ IN AIR

对加入0.05mass%～0.5mass%稀土Y铸造的K38G高温合金800℃恒温的氧化行为进行了研究.结果表明,含Y铸态K38G合金的氧化动力学曲线偏离了抛物线规律,接近于立方规律;Y有效抑制了该合金的内氧化;当Y含量达0.5mass%时,该合金中析出富Y相,降低了其氧化抗力.

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