本文選題：S鉆桿鋼 + 疲勞性能��； 參考：《機(jī)械工程材料》2017年12期

【摘要】：對S135鉆桿鋼進(jìn)行了旋轉(zhuǎn)彎曲疲勞試驗(yàn),研究了其疲勞性能,分析了夾雜物對疲勞性能的影響;利用光學(xué)顯微鏡測得不同視場下鋼中最大夾雜物的直徑,利用Murakami模型預(yù)測得到試樣的疲勞強(qiáng)度,并與試驗(yàn)結(jié)果進(jìn)行了對比。結(jié)果表明:疲勞裂紋源位于試樣表面或次表面的復(fù)雜氧化鋁夾雜物處,由升降法測得的疲勞強(qiáng)度為541.87 MPa;利用Murakami模型計(jì)算得到的疲勞強(qiáng)度與試驗(yàn)值的相對誤差最大為5.62%,Murakami模型計(jì)算的準(zhǔn)確性較高。
[Abstract]:In this paper, the rotating bending fatigue test of S135 drill pipe steel is carried out, its fatigue property is studied, the influence of inclusions on fatigue properties is analyzed, the diameter of the largest inclusions in steel under different view fields is obtained by optical microscope. The fatigue strength of the samples was predicted by Murakami model and compared with the test results. The results show that the fatigue crack source is located at the complex alumina inclusion on the surface or sub-surface of the specimen. The fatigue strength measured by the lifting method is 541.87 MPA, and the relative error between the fatigue strength calculated by the Murakami model and the test value is 5.62% and the accuracy of the Murakami model is higher than that of the Murakami model.
【作者單位】： 中國石化石油工程技術(shù)研究院;
【基金】：國家重大科技專項(xiàng)項(xiàng)目(2011ZX05005-006) 國家自然科學(xué)基金資助項(xiàng)目(51374218)
【分類號】：TE921.2;TG142.1

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本文編號：2049342