本文選題：鋁合金鉆桿 + 等效應(yīng)變��； 參考：《塑性工程學(xué)報(bào)》2017年06期

【摘要】：采用DEFORM-3D有限元分析軟件,以Yada為動(dòng)態(tài)再結(jié)晶模型,對(duì)Φ73 mm×9 mm雙端內(nèi)加厚7075鋁合金鉆桿管體擠壓成形的動(dòng)態(tài)再結(jié)晶進(jìn)行模擬,研究管體上動(dòng)態(tài)再結(jié)晶百分?jǐn)?shù)及其晶粒平均尺寸的分布規(guī)律,通過Φ73 mm×16 mm的前端加厚段、Φ73 mm×9 mm的主體管段擠壓實(shí)驗(yàn)得到管體各部位的金相圖,以驗(yàn)證數(shù)值模擬結(jié)果,并經(jīng)測(cè)試獲得前端加厚段與主體段內(nèi)、外表面維氏硬度,得到動(dòng)態(tài)再結(jié)晶不均勻分布對(duì)管體力學(xué)性能的影響。結(jié)果表明:徑向上,管體前端加厚段內(nèi)表面最大動(dòng)態(tài)再結(jié)晶百分?jǐn)?shù)及其晶粒平均尺寸分別為12.56%、17.58μm,分別比外表面高5.63%、12.26%;主體段內(nèi)表面的最大動(dòng)態(tài)再結(jié)晶百分?jǐn)?shù)及其晶粒平均尺寸分別為15.46%、16.98μm,分別比外表面低72.51%、21.93%;后端加厚段內(nèi)表面最大動(dòng)態(tài)再結(jié)晶體積分?jǐn)?shù)及其晶粒平均尺寸分別為17.89%、19.70μm,分別比外表面低78.57%、24.55%。軸向上,隨著擠壓的進(jìn)行,后端加厚段外表面動(dòng)態(tài)再結(jié)晶百分?jǐn)?shù)及其晶粒平均尺寸最大,分別達(dá)到83.48%、26.11μm;主體段動(dòng)態(tài)再結(jié)晶百分?jǐn)?shù)及其晶粒平均尺寸次之,分別達(dá)到56.24%、21.75μm;前端加厚段動(dòng)態(tài)再結(jié)晶百分?jǐn)?shù)及其晶粒平均尺寸最小,分別為13.29%、18.42μm。外表面維氏硬度較內(nèi)表面增加了5.811%,主體段維氏硬度較前端加厚段增加了9.323%。
[Abstract]:The dynamic recrystallization of 桅 73 mm 脳 9 mm double end inner thickened 7075 aluminum alloy drill pipe was simulated by using DEFORM-3D finite element analysis software and Yada as dynamic recrystallization model. The distribution law of dynamic recrystallization percentage and average grain size on tube body is studied. The metallographic diagrams of various parts of tube body are obtained by extrusion experiments of 桅 73 mm 脳 16 mm front end thickening section and 桅 73 mm 脳 9 mm main tube segment, so as to verify the numerical simulation results. The Vickers hardness of the front end thickening section and the inner and outer surface of the main segment were obtained, and the effect of dynamic recrystallization uneven distribution on the mechanical properties of the pipe was obtained. The results show that: radial, The maximum dynamic recrystallization percentage and the average grain size of the inner surface of the thickened section of the tube body are 12.56 ~ 17.58 渭 m, 5.630.26 渭 m higher than those of the outer surface, respectively, and the maximum dynamic recrystallization percentage and the average grain size of the inner surface of the main segment are 15.46 渭 m and 16.98 渭 m, respectively. The maximum dynamic recrystallization volume integral number and the average grain size of the inner surface in the back-end thickening section are 17.89 and 19.70 渭 m, respectively, which are 78.57 and 24.55 渭 m lower than those on the outer surface, respectively. In axial direction, with the extrusion, the dynamic recrystallization percentage and the average grain size of the outer surface of the thickening segment are the largest, reaching 83.48 ~ 26.11 渭 m respectively, while the dynamic recrystallization percentage of the main segment and the average grain size of the main segment are the second. The dynamic recrystallization percentage and the average grain size of the front thickening section are the smallest, 13.29 and 18.42 渭 m, respectively. The Vickers hardness of the outer surface is 5.811 higher than that of the inner surface, and the Vickers hardness of the main segment is 9.32323% higher than that of the thickening section of the front end.
【作者單位】： 西南石油大學(xué)材料科學(xué)與工程學(xué)院;
【基金】：四川省教育廳重點(diǎn)項(xiàng)目(13ZA0181) 油氣田材料重點(diǎn)實(shí)驗(yàn)室開放基金(X151516KCL22) 國(guó)家重點(diǎn)技術(shù)研發(fā)計(jì)劃(2012BAF09B04)
【分類號(hào)】：TE921.2;TG146.21
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本文編號(hào)：1985365