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奧氏體型合金熔化焊接頭微觀組織不均勻性及對疲勞性能影響的研究
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TG113.12

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“八五”航空基金


Microstructural Nonuniformity and Fatigue Properties of Welded Joints of Austenitic Alloys
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    摘要:

    研究了１Ｃｒ１８Ｎｉ９Ｔｉ和ＧＨ１５０合金熔化焊接頭微觀組織的不均勻性及其對疲勞性能的影響。由金相分析方法得出它們熱影響區(qū)組織的特殊性和接頭各區(qū)域組織分布特點。結(jié)果表明，該焊接接頭的熔合區(qū)組織不均性最為嚴重，是該接頭疲勞性能最為薄弱的部位。用１Ｃｒ１８Ｎｉ９Ｔｉ對接氬弧焊試樣做低周疲勞試驗得到：焊接試樣的應(yīng)變疲勞壽命比相應(yīng)的光滑試樣降低５０％左右，并且疲勞源幾乎全部產(chǎn)生在熔合區(qū)

    Abstract:

    The microstructural nonuniformity and fatigue properties of welded joints of austenitic alloys are investigated. The microstructural character of the welded Joints is studied using optical metallograph microscope. The experimental results show that the degree of microstructural nonuniformity is highest within the range of the bonded junction, and the fatigue resistance is lowest within the bonded zone. The results of low cycle fatigue test also show that, for the argon are welded 1Cr18Ni9Ti joint, the strain cycling fatigue lifetime of is only about half of that of the base metal, and the fatigue cracks always develop first in the bonded zone of welded joint.

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阮米慶,范引鶴,顧海鋒.奧氏體型合金熔化焊接頭微觀組織不均勻性及對疲勞性能影響的研究[J].稀有金屬材料與工程,1999,(1).[Ruan Miqing, Fan Yinhe, Gu Haifeng. Microstructural Nonuniformity and Fatigue Properties of Welded Joints of Austenitic Alloys[J]. Rare Metal Materials and Engineering,1999,(1).]
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