论文部分内容阅读
为了解析出物对经济型双相不锈钢2101热塑性的影响机制,对比了相同工艺下2101和2205双相不锈钢在热变形过程中相界析出物产生的规律.结果表明:2101钢比2205钢的相界处更倾向于产生析出物,促使后续热变形过程中相界产生裂纹,进而影响材料的热塑性.根据热力学相关数据,通过Thermo-Calc和实验测试数据,推导出2101和2205双相不锈钢析出物Cr2N的平衡固溶度公式,计算实验钢中析出物Cr2N的全固溶温度,同时引入Wagner相互作用系数,考虑了Ni、Mn、Mo和Si对固溶度积公式的影响.发现2101双相不锈钢中Cr2N的全固溶温度比2205钢高100℃左右,计算结果和实验结果吻合较好.实际生产过程中必须控制双相不锈钢热轧的终轧温度到全固溶温度以上,否则相界容易产生氮化物析出,影响材料热塑性.
In order to understand the mechanism of the effect of material on the thermoplasticity of economical duplex stainless steel 2101, the regularities of phase boundary precipitates in 2101 and 2205 duplex stainless steels under the same process were compared.The results show that 2101 steel is more stable than 2205 steel, The boundary is more inclined to produce precipitates, which will lead to cracks in the phase boundary during the subsequent thermal deformation, which will affect the material’s thermoplasticity.According to the thermodynamic data, the 2101 and 2205 duplex stainless steel precipitates are deduced by Thermo-Calc and experimental data Cr2N equilibrium solid solubility formula to calculate the experimental steel precipitation Cr2N total solution temperature, while introducing Wagner interaction coefficient, taking into account the Ni, Mn, Mo and Si on the solid solubility product formula was found 2101 biphasic The results show that the total solution temperature of Cr2N in stainless steel is about 100 ℃ higher than that of 2205 steel.The calculated results agree well with the experimental results.In the actual production process, the final hot rolling temperature of duplex stainless steel must be controlled above the temperature of all solid solution, Nitride easily produce precipitation, affecting the material thermoplastic.