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在奥氏体耐热钢添加硼可提高其蠕变性能，由于添加Ｂ元素使晶界析出物变小且稳定，可抑制晶界破断。新日本制铁采用α射线痕迹侵蚀法（ＡＴＥ）分析Ｂ元素进行了试验。试验材选择３种钢成分，Ａ钢成分（％）０．１０４Ｃ０．１２Ｓ０．５２Ｍｎ９．１４Ｃｒ０．５０Ｍ?
The addition of boron to austenitic heat-resistant steel improves its creep properties, and grain boundary precipitates are reduced and stabilized by the addition of a B element so that grain boundary fracture can be suppressed. Nippon Steel tested the element B using the alpha ray trace erosion (ATE) method. Test material selection of three kinds of steel components, A steel composition (%) 0.104C 0.12S 0.52Mn 9.14Cr 0.50M?