2復(fù)合材料;預(yù)熱溫度;熱擠壓;有限元分析;微觀結(jié)構(gòu)演變"/> 2復(fù)合材料在熱擠壓過(guò)程中,應(yīng)力、應(yīng)變和顯微組織的影響,并通過(guò)模擬計(jì)算驗(yàn)證實(shí)驗(yàn)結(jié)果。結(jié)果表明,提高預(yù)熱溫度將導(dǎo)致應(yīng)力降低,顆粒彌散以及金屬流動(dòng)性增強(qiáng),這有利于減小模具磨損深度,但會(huì)減弱CuO的纖維化程度。在軸向和徑向上都出現(xiàn)了溫度梯度,且兩者的溫度變化隨熱擠壓的進(jìn)行表現(xiàn)出相反的規(guī)律,提高預(yù)熱溫度可使徑向溫差為零。在800℃的預(yù)熱溫度下,坯料受熱均勻,模具磨損較小,立方CuO能夠充分纖維化,因此是AgCuOSnO2復(fù)合材料熱擠壓的理想預(yù)熱溫度。"/>

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預(yù)熱溫度對(duì)AgCuOSnO2熱擠壓變形的影響：有限元模擬與實(shí)驗(yàn)
作者:
作者單位:

1.昆明理工大學(xué) 材料科學(xué)與工程學(xué)院/云南省先進(jìn)材料重點(diǎn)實(shí)驗(yàn)室/稀有貴金屬有色金屬新材料教育部重點(diǎn)實(shí)驗(yàn)室;2.昆明貴金屬研究所;3.中國(guó)有色金屬桂林地質(zhì)礦業(yè)有限公司 桂林微電子電極材料與生物納米材料重點(diǎn)實(shí)驗(yàn)室

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中圖分類號(hào):

基金項(xiàng)目:

云南省科學(xué)技術(shù)重點(diǎn)項(xiàng)目(項(xiàng)目號(hào)2017FA027)


The Effect of Preheating Temperature on Hot Extrusion Deformation of AgCuOSnO2: Finite Element Simulation and Experimental Study
Author:
Affiliation:

1.Department of Materials Science and Engineering,Kunming University of Science and Technology/ Key Laboratory of Advanced Materials of Yunnan Province/Key Laboratory of Advanced Materials inRare Precious and Nonferrous Metals,Ministry of Education;2.Guilin Key Laboratory of Microelectronic Electrode Materials and Biological Nanomaterials,China Nonferrous Metal Guilin Geology and Mining Co,Ltd

Fund Project:

Key Project of Science and Technology of Yunnan Province

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    摘要:

    根據(jù)實(shí)驗(yàn)結(jié)果建立有限元模型,研究了不同預(yù)熱溫度對(duì)AgCuOSnO2復(fù)合材料在熱擠壓過(guò)程中,應(yīng)力、應(yīng)變和顯微組織的影響,并通過(guò)模擬計(jì)算驗(yàn)證實(shí)驗(yàn)結(jié)果。結(jié)果表明,提高預(yù)熱溫度將導(dǎo)致應(yīng)力降低,顆粒彌散以及金屬流動(dòng)性增強(qiáng),這有利于減小模具磨損深度,但會(huì)減弱CuO的纖維化程度。在軸向和徑向上都出現(xiàn)了溫度梯度,且兩者的溫度變化隨熱擠壓的進(jìn)行表現(xiàn)出相反的規(guī)律,提高預(yù)熱溫度可使徑向溫差為零。在800℃的預(yù)熱溫度下,坯料受熱均勻,模具磨損較小,立方CuO能夠充分纖維化,因此是AgCuOSnO2復(fù)合材料熱擠壓的理想預(yù)熱溫度。

    Abstract:

    Based on the experimental results, the finite element model was established to study the effect of different preheating temperature on the stress, strain and microstructure of AgCuOSnO2 composites during hot extrusion, and the experimental results were verified by simulation calculations. The results show that the increase of preheating temperature will lead to stress reduction, particle dispersion and metal fluidity enhancement, which is beneficial to reduce the wear depth of the mold, but will weaken the degree of fibrosis of CuO. The temperature gradient appears in both the axial and radial directions, and the temperature change of both shows opposite laws during hot extrusion. The radial temperature difference can be zero by increasing the preheating temperature. At 800 ℃, the billet is heated evenly, the mold wear is small, and cubic CuO can be fully fibrosis. Therefore, it is the ideal preheating temperature for hot extrusion of AgCuOSnO2 composite.

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周曉龍,李金濤,熊愛(ài)虎,劉滿門,王立惠.預(yù)熱溫度對(duì)AgCuOSnO2熱擠壓變形的影響：有限元模擬與實(shí)驗(yàn)[J].稀有金屬材料與工程,2022,51(1):306~314.[ZHOU Xiaolong, LI Jintao, XIONG Aihu, LIU Manmen, WANG Lihui. The Effect of Preheating Temperature on Hot Extrusion Deformation of AgCuOSnO2: Finite Element Simulation and Experimental Study[J]. Rare Metal Materials and Engineering,2022,51(1):306~314.]
DOI：10.12442/j. issn.1002-185X.20210061

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  • 收稿日期:2021-01-20
  • 最后修改日期:2021-05-07
  • 錄用日期:2021-06-21
  • 在線發(fā)布日期: 2022-02-09
  • 出版日期: 2022-01-28