【作者】 郭闯； 郭汉杰；

【Author】 Guo Chuang;Guo Hanjie;University of Science and Technology Beijing,School of Metallurgical and Ecological Engineering;

【机构】 北京科技大学冶金与生态工程学院；

【摘要】 为研究H13模具钢在不同的淬火、回火温度下以及不同位置析出物的类型、微观结构和粒度分布,进而通过对纳米析出物的控制实现钢铁材料的组织性能强化。实验中采用非水溶液电解的方式提取分离钢中的析出物,并针对H13钢的特点对电解液的配方进行了研究与优化,设计了一种以甲醇、乙酰丙酮、氯化锂为主,并辅以多种添加剂的电解液,严格控制了常规非水溶液电解中的结晶和胶体干扰等现象,并将电解液的pH值稳定在7~8的范围内。使用高分辨率透射电子显微镜对分离物进行观察,获得了拥有完整形貌和微观结构的电子图像,特别是尺寸在10nm以下范围内的对钢材起到明显析出强化作用的纳米析出物,并初步验证碳化析出物的形成机理。更多还原

【Abstract】 Through the study of the type, microstructure and size distribution of the deposition under different quenching and temperingtemperature or different position, people can strengthen the performance of the steel by controlling the precipitation of the nano-deposition. Non-aqueous solution electrolysis method is used to extract the deposition in the steel, a study and optimum proposal on the electrolyte formulais raised according to the characteristics of H13 steel in this paper, designing a type of electrolyte mixed with methyl alcohol, diacetylmethane, LiCl and some other additives, strictlycontrolling the crystallization and the interference of colloid in traditionalelectrolysis with non-aqueous solution, and stabilizing the p H fluctuation between 7~8. Observing the isolates with HRTEM, researchers get the electronic image with integral morphology and microstructure, especially those deposition whose size is less than 10 nm and can make obvious impact on precipitation strength,the observed results also verify the formation mechanism of these deposition.更多还原