中碳弹簧钢加热过程脱碳特性的试验研究  

Investigation on Decarburizing Characteristic of Medium Carbon Spring Steel in Heating Process

作　　者：崔娟[1] 刘雅政[1] 黄学启[1] 

机构地区：[1]北京科技大学材料学院,北京100083

出　　处：《热加工工艺》2007年第20期20-23,共4页Hot Working Technology

基　　金：北京市科技计划项目(D0404001040221)

摘　　要：用金相显微组织法对比研究了Si-Mn系弹簧钢与Cr-V系弹簧钢在相同加热条件下的脱碳行为,分析了加热温度和保温时间对中碳弹簧钢脱碳层深度的影响,为建立完善的生产高强度优质弹簧钢的加热制度提供了理论依据。结果表明,在相同的保温时间下,Si-Mn系试验钢的全脱碳层深度在900℃出现最大值,其总脱碳层深度也存在着一个敏感温度(1 100℃);而Cr-V系试验钢在加热温度超过950℃时,全脱碳层深度变化很小,其总脱碳层深度在950～1 000℃会有所降低,但超过1 000℃会显著增加。无论是等温还是等时间热处理工艺条件下,由于合金元素的作用,Cr-V系弹簧钢脱碳敏感性明显低于Si-Mn系弹簧钢。The decarburization character of Si-Mn series and Cr-V series spring steels was investigated under the same heating condition by means of microstructure comparison technique. The effects of heating temperature and holding time on decarburization sensitivity were analysed, which offered the theoretical foundation to amend the heating system of high-strength and high-quality spring steels. The results show that, at the same holding time, as for Si-Mn series steels, the entire decarburization depth is the maximum at 900℃ and the sensitive temperature of total decarburization depth is 1 100℃ . But as for Cr-V series steels, above heating temperature 950℃ ,the entire decarburization depth rarely changes, and the entire decarburization depth reduces in some sort at 950- 1 000℃, but increases rapidly above 1 000℃. Due to the function of elements, the decarburization sensitivity of Cr-V series spring steels is much lower than that of Si-Mn series spring steels at both isothermal and equitime heat treatment.

关 键 词：中碳弹簧钢 脱碳 加热温度 保温时间 

分 类 号：TG142.41[一般工业技术—材料科学与工程]