序言WNr1.4876(800合金)是在核领域中广泛使用的材料。无论是加填充焊丝或不加填充焊丝进行焊接,都存在着热裂缝问题。这些问题带来了大量的试验研究工作。在大多数著作中,都把可焊性与材料的纯洁度及微量元素联系在一起。由于高Mn和低Si对纯奥氏体不锈钢抗裂性能的有利作用已为人们所共知,所以本文着重研究这种作用 Preface WNr1.4876 (800 alloy) is a widely used material in the nuclear field. Whether it is filled or not filled with welding wire welding, there are hot cracks. These problems have brought a lot of experimental research. In most works, solderability is tied to the purity of the material and trace elements. Since the beneficial effects of high Mn and low Si on the crack resistance of pure austenitic stainless steels have been well known, this article focuses on this role