In this work, the beneficial effect of boron in the alleviation of Liquid Metal Embrittlement (LME) of steel when brazed using Cu–Zn filler wire is discussed. Addition of boron to steel is found to suppress the diffusion of liquid metal along the grain boundaries during brazing. Whereas, steel without boron addition showed intergranular diffusion of the brazing alloy leading to failure. It was also observed that the addition of boron in steel caused a reduction in the value due to the suppression of desirable {111} plane parallel to the sheet normal direction (ND). An optimal level of boron addition in steel is essential to maintain the drawability of steel while introducing the beneficial effects of boron to alleviate LME.

中文翻译：

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硼对可拉拔钢中液态金属脆化的抑制作用

在这项工作中，讨论了硼在使用 Cu-Zn 填充焊丝进行钎焊时减轻钢的液态金属脆化 (LME) 的有益效果。发现向钢中添加硼可抑制钎焊过程中液态金属沿晶界的扩散。而没有添加硼的钢表现出钎焊合金的晶间扩散导致失效。还观察到，由于抑制了与板法线方向 (ND) 平行的所需 {111} 面，钢中添加硼会导致该值降低。钢中硼的最佳添加水平对于保持钢的可拉伸性至关重要，同时引入硼的有益效果以减轻 LME。