依靠自身工艺装备能力,通过对化学成分、冶炼、模铸、加热、轧制及热处理等工艺的优化调整,鞍钢成功开发出厚度145 mm、单重20 t的13Mn Ni Mo5-4锅炉汽包用特厚钢板。经性能检验,供货态和热循环态钢板的各项性能指标均满足相关标准及用...依靠自身工艺装备能力,通过对化学成分、冶炼、模铸、加热、轧制及热处理等工艺的优化调整,鞍钢成功开发出厚度145 mm、单重20 t的13Mn Ni Mo5-4锅炉汽包用特厚钢板。经性能检验,供货态和热循环态钢板的各项性能指标均满足相关标准及用户技术条件要求,且富余量较大。综合结果表明钢板钢质纯净、头、尾性能均匀、厚度方向性能差异小、表面质量优良、超声波探伤结果满足JB/T 4730.3~2005Ⅰ级。展开更多
A method based on solution of the inverse heat conduction problem was presented for online stress monitoring and fatigue life analysis of boiler drums. The mathematical model of the drum temperature distribution is ba...A method based on solution of the inverse heat conduction problem was presented for online stress monitoring and fatigue life analysis of boiler drums. The mathematical model of the drum temperature distribution is based on the assumptions that the difference of temperature along the longitudinal axis of the boiler drum is negligible with changes only in the radial direction and the circumferential direction, and that the outer surface of drum is thermaUy insulated. Combining this model with the control-volume method provides temperatures at different points on a cross-section of the drum. With the temperature data, the stresses and the life expectancy of the boiler drum are derived according to the ASME code. Applying this method to the cold start-up process of a 300 MW boiler demonstrated the absence of errors caused by the boundary condition assumptions on the inner surface of the drum and testified that the method is an applicable technique for the online stress monitoring and fatigue life analysis of boiler drums.展开更多
基金Funded by the National Science and Technology Support Project of China (No. 2006BAA03B02-03)
文摘A method based on solution of the inverse heat conduction problem was presented for online stress monitoring and fatigue life analysis of boiler drums. The mathematical model of the drum temperature distribution is based on the assumptions that the difference of temperature along the longitudinal axis of the boiler drum is negligible with changes only in the radial direction and the circumferential direction, and that the outer surface of drum is thermaUy insulated. Combining this model with the control-volume method provides temperatures at different points on a cross-section of the drum. With the temperature data, the stresses and the life expectancy of the boiler drum are derived according to the ASME code. Applying this method to the cold start-up process of a 300 MW boiler demonstrated the absence of errors caused by the boundary condition assumptions on the inner surface of the drum and testified that the method is an applicable technique for the online stress monitoring and fatigue life analysis of boiler drums.
