文章信息/Info

Title:

Optimization of Coating Materials to Suppress Substrate Thermal Effects in Induction Brazing

文章編號:

1674-3962(2023)06-0506-08

作者:

趙夢琪;  石秋生;  陳　林;  楊冠軍

西安交通大學材料科學與工程學院 金屬材料強度國家重點實驗室, 陜西 西安 710049

Author(s):

ZHAO Mengqi;  SHI Qiusheng;  Chen Lin;  YANG Guanjun

State Key Laboratory for Mechanical Behavior of Materials, School of Materials Science and Engineering,Xi‘an Jiaotong University, Xi’an 710049, China

關鍵詞:

感應重熔;  涂層特性;  有限元法;  溫度分布;  數值模擬

Keywords:

induction remelting;  coating characteristics;  finite element method; temperature distribution;  numerical study

分類號:

TG174. 44

DOI:

10.7502/j.issn.1674-3962.202104004

文獻標志碼:

A

摘要:

為抑制感應釬涂層的基體熱效應, 以涂層感應重熔過程為研究對象, 建立二維有限元模型, 研究了涂層材料和厚度對感應重熔溫度場的影響規律。在本研究條件下得出以下結論: 當Ti49Zr49Be 涂層厚度為0. 1~0. 5 mm 時, 涂層熔化界面的推移方式受涂層厚度影響顯著, 隨著涂層厚度的增加, 基體敏感深度和高于敏感溫度的持續時間均減小; 相較于高熔點Ni71CrSi 鎳基涂層, 低熔點Ni65CrP 鎳基涂層重熔過程中的基體敏感深度較淺、持續時間較短; 相較于相同熔點的Ni65CrP鎳基涂層, Ti49Zr49Be 鈦基涂層重熔過程中的基體敏感深度較淺、持續時間較短。因此, 降低涂層材料熔點、適當增加涂層厚度, 均有利于減小熱影響深度、縮短熱影響時間, 從而抑制感應釬涂過程中的基體熱效應。

Abstract:

To suppress the substrate thermal effects in induction brazing, a two-dimensional finite element model was established to study the induction remelting process of the coating. The influence of the coating materials and thickness on the temperature field was investigated. Under the present conditions, the following conclusions were drawn: when the thickness of the Ti49Zr49Be coating was between 0. 1 and 0. 5 mm, the movement of the coating melting interface was significantly affected by the coating thickness.With an increase in coating thickness, both the sensitive depth of the substrate and the duration above the sensitive temperature decreased.Compared to the high-melting-point Ni71CrSi nickel-based coating, the lowmelting-point Ni65CrP nickel-based coating exhibited a shallower sensitive depth and shorter duration during the remelting process. Similarly,compared to the Ni65CrP nickel-based coating with the same melting point, the Ti49Zr49Be titaniumbased coating showed a shallower sensitive depth and shorter duration during the remelting process. Therefore, reducing the melting point of the coating material and appropriately increasing the coating thickness are both beneficial in reducing the sensitive depth and duration, thereby suppressing the substrate thermal effects in induction brazing.