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鈦合金鑄錠尾部冶金質(zhì)量影響因素研究
作者:
作者單位:

1.西北工業(yè)大學(xué) 凝固技術(shù)國(guó)家重點(diǎn)實(shí)驗(yàn)室;2.西部超導(dǎo)材料科技股份有限公司

作者簡(jiǎn)介:

通訊作者:

中圖分類號(hào):

TG 146.2

基金項(xiàng)目:

陜西省重點(diǎn)研發(fā)計(jì)劃項(xiàng)目-工業(yè)領(lǐng)域(項(xiàng)目號(hào)2018ZDXM-GY-140)


Influence of start-up arc on metallurgical quality of titanium ingot’s back-end in VAR process
Author:
Affiliation:

1.State Key Laboratity of Solidification Processing,Northwestern Polytechnical University,Xi’an;2.Western Superconducting Technologies Co,Ltd,Xi’an

Fund Project:

Funded by the National key research and development program No.2018YFB1106000

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    摘要:

    本文采用數(shù)值模擬方法，通過(guò)從熔煉起弧階段的能量輸入（以及散熱）的角度分析影響鑄錠尾部冶金質(zhì)量的關(guān)鍵因素，對(duì)第三次熔煉的起弧工藝參數(shù)進(jìn)行研究，并通過(guò)實(shí)驗(yàn)進(jìn)行了驗(yàn)證。結(jié)果表明，電流起弧后隨著熔煉的進(jìn)行，鑄錠表面溫度逐漸升高，在熔煉至鑄錠30mm高度處，表面溫度達(dá)到最高。通過(guò)選擇合適時(shí)機(jī)提升起弧電流大小，加快電流上升速度，可以使熔池表面溫度明顯上升。Φ720mm規(guī)格TC17鈦合金第三次熔煉起弧電流增大4kA，1min快速升至大電流，大電流保持時(shí)間延長(zhǎng)6min，能夠?qū)崿F(xiàn)熔池快速健全，達(dá)到穩(wěn)定熔池時(shí)熔煉的金屬重量減少約一半，數(shù)值模擬和實(shí)驗(yàn)結(jié)果的一致性吻合良好。

    Abstract:

    In this paper, the numerical simulation method is used to analyze the key factors affecting the metallurgical quality of the ingot back-end from the perspective of energy input ( and heat dissipation ) at the start-up stage during VAR process. The start up stage process parameters of the third smelting process are studied and verified by experiments. The results show that the surface temperature of the ingot gradually increases with the remelting time during the start-up stage, and the surface temperature reaches the highest at the height of 30 mm ingot. By controling the appropriate time to increase the arc current and accelerate the current rise rate, the surface temperature of the molten pool can be significantly increased. The arc current of Φ720mm TC17 titanium alloy increases by 4kA in the third remelting, and rapidly rises to a large current in 1min, then the holding time of the large current is extended by 6min, which can accelerat to bulid the molten pool, and the weight of the molten metal is reduced by about half. The numerical simulation and experimental results are in good agreement.

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引用本文

趙小花,王凱旋,王錦程,樓美琪,王陽(yáng)陽(yáng),劉鵬,劉向宏.鈦合金鑄錠尾部冶金質(zhì)量影響因素研究[J].稀有金屬材料與工程,2024,53(9):2565~2570.[Zhao Xiaohua, Wang Kaixuan, Wang Jincheng, Lou Meiqi, Wang Yangyang, Liu Peng, Liu Xianghong. Influence of start-up arc on metallurgical quality of titanium ingot’s back-end in VAR process[J]. Rare Metal Materials and Engineering,2024,53(9):2565~2570.]
DOI：10.12442/j. issn.1002-185X.20230457

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  • 收稿日期:2023-07-23
  • 最后修改日期:2023-08-20
  • 錄用日期:2023-08-24
  • 在線發(fā)布日期: 2024-09-13
  • 出版日期: 2024-09-04