Deguang ZHOU
,
Jie FU
,
Xichun CHEN
,
Jing LI
材料科学技术（英文）
The precipitation behavior of titanium nitride (TiN) in bearing steel and effects of TiN inclusions on quality of the steel have been studied by thermodynamic calculation and experiment. The results show that with the increase of the content of Ti and [N], the properties of bearing steel decreased; adjusting the content of N and Ti could influence the precipitation occasion and condition of TiN in the steels. If Ti content is less than 30×10-6 and nitrogen content is less than 53×10-6, the temperature of TiN precipitation is under the solidus temperature and the size is small so that they have little harmful and even beneficial effect on the properties owing to grain refinement.
关键词:
Bearing steel
,
null
,
null
邱倩
物理测试
本文通过对某钢厂滚动接触疲劳寿命较低的S55C轴承钢取样做蓝脆断口试验：SEM显微形貌分析和红外吸收光谱测定试样中碳、硫的不均匀度等理化特性分析，同时对该钢的宏观夹杂物进行测定，发现该钢半径二分之一区域处的碳、硫等元素的含量较高，边部与心部都为负偏析，而且其断口SEM的显微形态上有硫化物的析出并伴随微区的沿晶断裂，从而找出了导致该钢疲劳寿命较低的主要原因。
关键词:
轴承钢
,
contact fatigue
,
segregation
,
S55C steel
孔祥华
,
刘建尊
,
刘在龙
,
王德炯
,
孙华
材料热处理学报
为了有效控制GCr15轴承钢中的液析碳化物,采用gleeble 1500热模拟实验和变形热处理实验,研究了高温变形对其液析碳化物溶解行为的影响.结果表明,GCr15轴承钢的热轧温度越高,液析碳化物越少.液析碳化物经过热轧破碎后可以在950℃快速溶解,碳化物均匀性显著改善.
关键词:
轴承钢
,
GCr15
,
液析碳化物
