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蓄热室内置式加热炉炉体损坏原因与修复 张少忠1,罗国民2 (1.广东韶关钢铁集团有限公司,广东,曲江,512122;2.广东松山职业技术学院,广东,曲江,512126) 摘要:介绍了蓄热室内置式加热炉的特点,分析了其炉体发生损坏的原因,并提出了已经实践检验的相应修复方法. 关键词:蓄热室; 内置式加热炉; 炉体修复; [全文内容正在添加中] ......
of these UFAGs during both the reheating and cooling stages were investigated. The results indicated that UFAGs without pinning particles appeared with significant coarsening when the reheating......
,Jie LIU,Zehui HUA,Lijin ZHAO,Feifei PEN,Hui LI摘 要:The effects of CEC passes, isothermal holding time and reheating temperature on the microstructure... was improved. With increasing the reheating temperature, namely increasing liquid fraction, the solid grain size obviously decreased during the period from 560℃ to 570℃ and then slightly increased after......
includes quenching from 950 ℃ to the intermediate temperature of 350-550 ℃ at the rate of 30 ℃/s and subsequent reheating at the rate of 20-50 ℃/s and partitioning at 660-800 ℃. The microstructure..., the diminishment of the MA average grain size and increment of the MA volume fraction is caused by the intermediate temperature decrease, the reheating rate increase and a proper partitioning temperature......
of carbonitrides: Ti- and Nb-rich (Ti, Nb)(C, N) carbonitrides during reheating. Four types of precipitates mainly exist in the hot rolled plate: Ti-rich carbonitrides resulted from the dendritic carbonitrides undissolved during the reheating process; Ti-rich carbonitrides re-precipitated along austenite grain boundaries during the re-heating process; NbC carbides mainly heterogeneously nucleated......
strategy during the reheating process and cooling process after rolling was put forward to protect against ferrite decarburization. The results show that ferrite decarburization, which has the strong... on decarburization. Reasonable preheating temperature in the billet reheating process and austenitizing temperature in the heat-treatment process are suggested to protect against ferrite decarburization......
particles during casting,the reheating time and temperature were examined.The results showed that the process effectively changes the dendrite structure to globular one.关键词:......
, The University of Tokyo摘 要:A series of reheating-isothermal holding experiments and compression tests were conducted on pristine magnesium alloy AZ91 extruded...-Mg matrix occurred during the reheating of these materials. Spherical semisolid slurries of these materials were obtained when the reheating temperature and isothermal holding time were 550?C and 20......
Trans. Nonferrous Met. Soc. China 29(2019) 2237-2244 Cooling slope casting of AA7075 alloy combined with reheating and thixoforging Kerem Altug GULER1, Alptekin KISASOZ1, Gokhan OZER2, Ahmet... with non-dendritic microstructure. Semi-solid forming of the AA7075 was studied via cooling slope casting, reheating and thixoforging processes in order to determine the effect of semi-solid casting......
THE INVESTIGATION ON THE RHEOLOGICAL BEHAVIOR OF SEMI-SOLID ALUMINUM ALLOY DURING DIE CASTING J.Lin1,X.J.Yang2 (1.School of Mechanic & Electronic Engineering, Shanghai University, Shanghai 200072, China;2.School of Mechanic & Electronic Engineering, Nanch ang University, Jiangxi 330029, China) Abstract:Under the condition of die casting and reheating temperature of 570-580° C, the Rhe-ological......
