Vacuum diffusion bonding strengthening mechanical properties of 304 stainless steel/low carbon steel composites by in-situ eutectic reaction

IF 3.9 2区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY Vacuum Pub Date : 2025-03-21 DOI:10.1016/j.vacuum.2025.114279

Zelin Yan, Chenhao Sun, Shuang Liu, Xiangpeng Chang, Weiping Tong

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Abstract

To effectively regulate high temperature on the properties of the base materials and the surface decarburization of low carbon steel (LCS) caused by the violent atomic interdiffusion, low-temperature vacuum diffusion bonding technology was used via graphite interlayer eutectic reaction with steel. Tunning the hardness distribution of different layer to improve the strength and ductility of 304 stainless steel (304SS)/LCS composite material by an in-situ eutectic reaction. Achieved a strong metallurgical bonded interface layer which consist of pearlite, austenite and M₇C₃ carbide eutectic structure. As a result, the tensile test perpendicular to the interface shows that the yield strength, tensile strength and total elongation of 304SS/LCS composite material are 256 MPa, 419 MPa and 22 %, respectively. The tensile fracture location at LCS layer, demonstrating the superior mechanical properties of the interface layer and the strong metallurgical bonding between 304SS and LCS. This study presents an effective solution for achieving reliable bonding between 304SS and LCS, which can be used for vacuum diffusion bonding of stainless and carbon steels due to its beneficial eutectic reaction.

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真空扩散结合原位共晶强化304不锈钢/低碳钢复合材料力学性能

为了有效调节高温对基材性能和低碳钢（LCS）表面脱碳造成的剧烈原子相互扩散，采用石墨层间共晶与钢反应的低温真空扩散键合技术。通过原位共晶反应调节不同层的硬度分布，提高304不锈钢(304SS)/LCS复合材料的强度和塑性。获得了由珠光体、奥氏体和M7C3碳化物共晶组织组成的强冶金结合界面层。结果表明，304SS/LCS复合材料的屈服强度为256 MPa，抗拉强度为419 MPa，总伸长率为22%。拉伸断口位于LCS层，表明界面层具有优越的力学性能，304SS与LCS之间存在较强的冶金结合。本研究提出了一种实现304SS与LCS之间可靠结合的有效解决方案，由于其有利于共晶反应，可用于不锈钢和碳钢的真空扩散结合。

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来源期刊

Vacuum 工程技术-材料科学：综合

CiteScore

6.80

自引率

17.50%

发文量

审稿时长

34 days

期刊介绍： Vacuum is an international rapid publications journal with a focus on short communication. All papers are peer-reviewed, with the review process for short communication geared towards very fast turnaround times. The journal also published full research papers, thematic issues and selected papers from leading conferences. A report in Vacuum should represent a major advance in an area that involves a controlled environment at pressures of one atmosphere or below. The scope of the journal includes: 1. Vacuum; original developments in vacuum pumping and instrumentation, vacuum measurement, vacuum gas dynamics, gas-surface interactions, surface treatment for UHV applications and low outgassing, vacuum melting, sintering, and vacuum metrology. Technology and solutions for large-scale facilities (e.g., particle accelerators and fusion devices). New instrumentation ( e.g., detectors and electron microscopes). 2. Plasma science; advances in PVD, CVD, plasma-assisted CVD, ion sources, deposition processes and analysis. 3. Surface science; surface engineering, surface chemistry, surface analysis, crystal growth, ion-surface interactions and etching, nanometer-scale processing, surface modification. 4. Materials science; novel functional or structural materials. Metals, ceramics, and polymers. Experiments, simulations, and modelling for understanding structure-property relationships. Thin films and coatings. Nanostructures and ion implantation.