本文对含有与不含有魏氏组织的S15A钢某些重要机械性能进行了测定和对比。结果表明,魏氏组织的存在有利于材料的机械性能。 含魏氏组织的S15A钢具有较好性能的原因可归结为:(1)产生魏氏组织的热处理条件使某种有害析出物难以形成,(2)先共析铁素体以魏氏组织存在等效于晶粒细化。 In this paper, some important mechanical properties of S15A steels with and without Wistar are measured and compared. The results show that the existence of Widmanstatten is beneficial to the mechanical properties of the material. The reasons for the better performance of S15A steels containing Widmanstall can be attributed to: (1) the heat treatment conditions that produce Widmanstall make it difficult to form some harmful precipitates, (2) the pro-eutectoid ferrite is present in Widmanstatten Equivalent to grain refinement.