论文部分内容阅读
采用ANSYS有限元模拟、彩色金相技术并利用背散射电子衍射(EBSD)的方法分析板条M/B混合组织对10CrNi5Mo低碳马氏体钢强韧性的影响。结果表明,特厚板厚度方向各部位冶金质量差别很小。淬火冷却条件下,钢板表面获得单一马氏体组织,1/4部位和心部得到板条M/B混合组织。板条M/B混合组织较单一马氏体组织具有更小的亚结构和更长的大角晶界是造成心部获得优良低温韧性的原因。板条M/B混合组织能显著提高10CrNi5Mo钢的低温韧性,降低韧脆转变温度,但对强度影响不明显。
The effects of slab M / B mixed microstructure on the toughness of 10CrNi5Mo low carbon martensitic steel were analyzed by ANSYS finite element simulation and color metallographic techniques with backscattered electron diffraction (EBSD). The results show that there is very little difference in the metallurgical quality of all parts in the thickness direction of the special thick slab. Quenching and cooling conditions, the surface of the steel obtained a single martensite, 1/4 parts and the heart of the slab M / B mixed tissue. Slab M / B mixed tissue has a smaller sub-structure and a longer, larger-angle grain boundary than a single martensitic structure, which is responsible for obtaining excellent low temperature toughness in the heart. Slat M / B mixed microstructure can significantly improve the low temperature toughness of 10CrNi5Mo steel, reduce the ductile-brittle transition temperature, but the impact of strength is not obvious.