本文關(guān)鍵詞：鈦合金斜軋穿孔過程高溫塑性變形行為及數(shù)值模擬研究　出處：《燕山大學(xué)》2015年碩士論文　論文類型：學(xué)位論文

  更多相關(guān)文章： TC4鈦合金 斜軋穿孔 高溫流變行為 數(shù)值模擬

【摘要】：鈦是一種重要的戰(zhàn)略資源,先進的鈦工業(yè)是綜合國力重要標志,大力發(fā)展鈦工業(yè)對鞏固國防和國民經(jīng)濟建設(shè)具有重大的戰(zhàn)略意義。各種形態(tài)的鈦產(chǎn)品已普遍應(yīng)用在高新技術(shù)的各個領(lǐng)域,在國民生活中占有舉足輕重的地位。鈦合金無縫管是鈦工業(yè)產(chǎn)品之一,管坯制備是生產(chǎn)無縫管的第一道工序,又是最重要一道工序。斜軋穿孔生產(chǎn)效率高,金屬模具消耗少,是制備鈦合金毛管的一種有效方法。但是,在鈦合金斜軋穿孔過程中,變形抗力大,加工硬化強烈,對加工工藝要求十分苛刻。本論文以某鈦合金無縫鋼管廠的TC4鈦合金管坯材料為研究對象,在Gleeble-3800熱模擬實驗機上對該合金進行等溫壓縮實驗。研究分析了不同變形條件對TC4鈦合金高溫變形行為和流變應(yīng)力的影響,根據(jù)實測數(shù)據(jù)建立了TC4鈦合金的新型高溫流變應(yīng)力模型。本論文接著針對TC4鈦合金管坯斜軋穿孔工藝問題,以有限元仿真軟件DEFORM-3D為模擬平臺,采用單因素輪換的方法,研究分析了三個比較重要的工藝參數(shù)(軋制速度、管坯溫度和頂頭前伸量)對TC4鈦合金斜軋穿孔過程中的管坯溫度、力能參數(shù)和毛管尺寸精度的影響規(guī)律。該論文的研究分析結(jié)果為優(yōu)化生產(chǎn)工藝和提高產(chǎn)品質(zhì)量提供了重要的理論和實用價值。
[Abstract]:Titanium is a kind of important strategic resources, advanced titanium industry is an important symbol of the comprehensive national strength, vigorously development of titanium industry is of great strategic significance in strengthening the national defense and national economic construction. The various forms of titanium products have been widely used in various fields of high technology, in the national life occupies a pivotal position in the titanium alloy seamless live. Titanium tube is one of the industrial products, billet preparation is the first process for production of seamless steel tube, and is one of the most important processes. Cross rolled metal mold with high production efficiency, low consumption, is an effective method for preparing titanium alloy shell. However, in titanium alloy rotary piercing process, large deformation resistance, strong work hardening, the processing technology requirements are very demanding. In this thesis, a TC4 titanium alloy titanium alloy seamless steel tube plant tube material as the research object, the experimental machine of the alloy in isothermal thermal simulation Gleeble-3800 Compression experiment. We analyzed the effects of different deformation conditions on deformation behavior of TC4 titanium alloy and the flow stress, according to the measured data, the establishment of a new high temperature flow stress model of TC4 titanium alloy. And then this paper for TC4 titanium alloy tube rotary piercing process, based on the finite element simulation software DEFORM-3D simulation platform. By using the method of single factor rotation, research and analysis of the three important parameters (rolling speed, billet temperature and plug advance) of TC4 titanium alloy roll piercing tube temperature in the process, can force the influence law of parameters and capillary size precision. The study results of this thesis is to optimize the production the process and provides an important theoretical and practical value in improving the quality of the products.

【學(xué)位授予單位】：燕山大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：TG339

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本文編號：1389692