CSP生产30CrMo钢表面脱碳行为的研究

发布时间：2018-05-20 07:16

  本文选题：30CrMo钢 + CSP工艺　； 参考：《武汉科技大学》2016年硕士论文

【摘要】：CSP工艺(即:紧凑式热带生产工艺)具有流程短,成本低,产品质量好等特点,能够有效改善传统流程所存在的一些问题,逐渐被推广用于生产各种中高碳钢产品。为了生产高附加值产品,追求更高的经济效益,研究CSP生产中高碳钢技术具有重要意义。本文以武钢CSP工艺生产的30CrMo钢为对象,研究了加热温度、保温时间以及加热气氛对30CrMo钢表面脱碳的影响规律。研究表明:加热温度范围为1000-1150℃,保温时间为15-60min,加热气氛为16.5%CO_2,0.8%O_2,13%H_2O,69.7%N_2的情况下,30CrMo钢的脱碳层厚度随着温度的升高出现了先增加后减小再又增大的趋势,1050℃为30CrMo钢的脱碳敏感温度。保温时间越长,脱碳层越厚。以CSP均热炉内气氛为基础,改变O_2,CO_2,H_2O的含量都会对30Cr Mo钢的脱碳有不同的影响。在15.8%CO_2+0.83%O_2+83.3%N_2、16.5%CO_2+0.8%O_2+13%H_2O+69.7%N_2、14.3%H_2O+85.7%N_2三种混合气氛中加热,14.3%H_2O+85.7%N_2混合气氛能够有效降低30Cr Mo钢脱碳层厚度。利用菲克第二定律建立脱碳动力学模型,以反应的吉布斯自由能变化为基础建立脱碳热力学模型,模型计算结果表明:增加加热温度和延长保温时间都会使理论脱碳层厚度增加。修正脱碳计算模型要考虑氧化对脱碳层的烧损。
[Abstract]:CSP process (i.e. compact tropical production process) has the characteristics of short process, low cost and good product quality. It can effectively improve some problems existing in the traditional process and has been gradually popularized to produce all kinds of medium and high carbon steel products. In order to produce high value-added products and pursue higher economic benefits, it is of great significance to study the technology of high carbon steel in CSP production. In this paper, the effect of heating temperature, holding time and heating atmosphere on surface decarburization of CSP steel produced by WISCO was studied. The results show that the decarburization thickness of 30CrMo steel increases first and then decreases and then increases with the increase of temperature. The heating temperature range is 1000-1150 鈩，

本文编号：1913681