共查询到18条相似文献,搜索用时 78 毫秒
1.
2.
3.
硼钢的淬透性和硼淬透性因子及硼平衡集聚的研究 总被引:1,自引:0,他引:1
研究了硼淬透性因子与硼的晶界平衡集聚规律、钢的成分、奥氏体化温度及晶粒尺寸的关系。建立了硼的晶界平衡集聚方程。导出了由钢的成分(碳和合金元素)定量计算硼淬透性因子的二元回归方程。考察了硼淬透性因子随奥氏体化温度变化的单峰曲线规律;研究结果表明,硼钢的淬透性与奥氏体化温度无关。本还对传统的计算淬透性用各种图表进行了回归分析,建立了硼淬透性因子等一系列淬透性计算的关系式。 相似文献
4.
在不同热处理条件下,对不同钛,硼含量的10炉锰钛硼钢进行了钛化合物溶解析出,淬透怀和组织性试验,以期研究不同钛硼含量对上述诸方面的影响,并进一步探讨了钛,硼最佳含量配比。 相似文献
5.
我国自从引进开发SCM822H钢种以来,其窄淬透带有效的稳定与控制问题,一直严重地困扰钢材用户和生产厂家。影响淬透值的因素有多种,找出其作用机理和控制方法是本文探讨的重点。 相似文献
6.
郑绪新 《金属材料与冶金工程》2010,38(2):21-24
我国自从引进开发SCM822H钢种以来,其窄淬透带有效的稳定与控制问题,多年来一直严重地困扰钢材用户和生产厂家。影响淬透值的因素有多种,找出其作用机理和控制方法是本文探讨的重点。 相似文献
7.
我国自从引进开发SCM822H钢以来,其窄淬透带有效的稳定与控制问题多年来一直严重地困扰着钢材用户和生产厂家,影响淬透值的因素有多种,从某一角度找出其作用机理和控制方法是本文探讨的重点。 相似文献
8.
9.
10.
11.
12.
Effect of Heat Treatment on Structure and Wear Re- sistance of High Chromium Cast Steel ContainingBoron 总被引:1,自引:0,他引:1
The microstructure, mechanical properties and wear resistance of high chromium cast steel containing boron after different heat treatments were studied by means of the optical microscopy (OM), the scanning electron microscopy (SEM), X-ray diffraction (XRD), hardness, impact toughness, tensile and pin-on-disc abrasion tests. The results show that as cast microstructures of boron-free high chromium steel consist of martensite and a few (Cr, Fe)_7C_3 carbide, and the macro-hardness of boron-free high chromium steel is 55-57 HRC. After 0.5 mass% B was added into high chromium cast steel, as-cast structure transforms into eutectic (Fe, Cr)2B, (Cr, Fe)7 (C, B)a and martensite, and the macro-hardness reaches 58-60 HRC. High temperature quenching leads to the disconnection and isolated distribution of boride, and there are many (Cr,Fe)_23 (C,B)_6 precipitated phases in the quenching structure. Quenching from 1050 ℃, high chromium steel obtained the highest hardness, and the hardness of high chromium cast steel containing boron is higher than that of boron-free high chromium steel. The change of quenching temperature has no obvious effect on impact toughness of high chromium steel, and the increase of quenching temperature leads to tensile strength having an increasing tendency. At the same quenching temperature, the wear resistance of high chromium cast steel containing boron is more excellent than that of boron-free high chromium steel. High chromium cast steel guide containing boron has good performance while using in steel bar mill. 相似文献
13.
14.
15.
16.
17.