[1]趙小花,何永勝,羅文忠,等.Ti_1023合金VAR熔煉數(shù)值模擬研究[J].中國(guó)材料進(jìn)展,2018,(05):047-51.[doi:10.7502/j.issn.1674-3962.2018.05.06]
ZHAO Xiaohua,HE Yongsheng,LUO Wenzhong,et al.Numerical Simulation of the VAR Process of Ti_1023 Alloy Ingot with Melt Flow VAR and Validation[J].MATERIALS CHINA,2018,(05):047-51.[doi:10.7502/j.issn.1674-3962.2018.05.06]
點(diǎn)擊復(fù)制
Ti_1023合金VAR熔煉數(shù)值模擬研究(
)
中國(guó)材料進(jìn)展[ISSN:1674-3962/CN:61-1473/TG]
- 卷:
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- 期數(shù):
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2018年第05期
- 頁(yè)碼:
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047-51
- 欄目:
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前沿綜述
- 出版日期:
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2018-05-31
文章信息/Info
- Title:
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Numerical Simulation of the VAR Process of Ti_1023 Alloy Ingot with Melt Flow VAR and Validation
- 作者:
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趙小花; 何永勝; 羅文忠; 賴運(yùn)金; 王凱旋; 劉向宏
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西部超導(dǎo)材料科技股份有限公司 陜西省航空材料工程實(shí)驗(yàn)室，陜西 西安 710018
- Author(s):
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ZHAO Xiaohua; HE Yongsheng; LUO Wenzhong; LAI Yunjin; WANG Kaixuan; LIU Xianghong
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Western Superconducting Technologies Co, Ltd, Shaanxi Province Engineering Laboratory for Aerial Material，Xi’an 710018, China
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- 關(guān)鍵詞:
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Ti_1023合金; Melt FlowVAR模擬; 熔池形狀; 元素分布; 實(shí)驗(yàn)驗(yàn)證
- Keywords:
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Ti_1023 alloy; Melt Flow VAR; molten pool shape; element distribution; validation
- DOI:
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10.7502/j.issn.1674-3962.2018.05.06
- 文獻(xiàn)標(biāo)志碼:
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A
- 摘要:
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Ti_1023合金因其優(yōu)異的性能廣泛應(yīng)用于大型承力結(jié)構(gòu)件，然而因其添加Fe元素含量較高，容易在真空自耗熔煉（VAR）制備鑄錠的過(guò)程中出現(xiàn)Fe偏析，影響鍛件的性能。利用多場(chǎng)耦合重熔工藝仿真優(yōu)化軟件（Melt FlowVAR）建立的模型研究了Ti1023合金在VAR不同階段下的熔池形狀和元素濃度分布，并以模擬工藝制備了Ti1023合金Φ640 mm大規(guī)格鑄錠進(jìn)行驗(yàn)證。結(jié)果表明：隨著熔煉的進(jìn)行，模擬的熔池形狀按初期的扁平狀→中期的V形→末期的深V形變化，熔煉后期的熔池深度為028 m，與實(shí)測(cè)結(jié)果基本一致。在鑄錠中心線頂部和底部Fe和Al元素成分的模擬結(jié)果與實(shí)測(cè)值吻合良好，但在鑄錠中間部分的模擬值與實(shí)測(cè)值存在較大偏差，分析認(rèn)為是Melt FlowVAR計(jì)算模型中沒(méi)有考慮等軸晶的沉降所導(dǎo)致的計(jì)算偏差所致。
- Abstract:
-
Owing to the excellent physical and mechanical properties, Ti1023 alloy has been used widely in large structure parts. Nowadays Ti1023 ingot is produced by vacuum arc remelting（VAR) process, which may cause the β freckles due to this alloys high Fe content. So the β freckles can affect forgings properties. In this work, the shape of molten pool and the element distribution of the Ti1023 ignot at different stage during the VAR process have been simulated by Melt FlowVAR. In order to validate the agreement between the model and experiment results, a fullscale Ti1023 ingot has been prepared. The results show that the shape of molten pool changed from bowl shape in the initial stage to Vshape in the medium stage, and then to deep Vshape in the last stage during the melting process. The final depth of the molten pool is about 028 m, which is in good agreement with the experimental result. In the top and bottom part of the ingot, the simulated results of the distribution of Fe and Al are in good agreement with the measured results. However, there is a big deviation between the measured and modeled results for the distribution of Fe and Al in the middle part of the ingot, which should be attributed to the computing deviation of isometric crystals sedimentation in this model.
更新日期/Last Update:
2018-06-06