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This work focuses on the technical and technological aspects of fusion welding of high-manganese steels exhibiting twinning-induced plasticity (TWIP) for both similar and dissimilar joints. Changes in the alloy chemistry resulting from evaporation and dilution are discussed with respect to stacking fault energy and austenite stability. The influence of fusion welding on grain size and strength is also discussed. Conclusions are drawn with respect to optimization processes for fusion welding of TWIP steel. 相似文献
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Gen-sheng Feng Sheng-li Wu Hong-liang Han Luo-wen Ma Wei-zhong Jiang Xiao-qin Liu 《北京科技大学学报(英文版)》2011,18(3):270-276
Sintering characteristics of common fluxes and sintering blending ores, such as mineralization capacity, liquid generation capacity, consolidation strength, were examined to master the behavior and effect of fluxes in sintering. Based on fundamental studies, sinter pot tests were carried out to obtain the principles of optimizing the sinter flux structure. The results showed that strong mineralization capacity, liquid phase generation capacity, and consolidation strength were obtained as sintering blending ... 相似文献
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A submicron mild steel produced by simple warm deformation 总被引:4,自引:0,他引:4
Mingyuan Liu Bi Shi Gang Bi Hanging Cao X. Cai Hongwei Song 《Materials Science and Engineering: A》2003,360(1-2):101-106
One simple deformation process, through which a submicron ferrite grained mild steel was fabricated, was introduced. According to the transmission electron microscope images of the microstructures, most of the boundaries formed during the process might be low angle boundaries, which means that most of the ultrafine grains are subgrains. This deformation process is attractive because: (1) the necessary strain was only 1.5, (2) the deformation resistance decreased due to higher rolling temperature, and (3) the as warm-rolled mild steel had a microstructure with equiaxed grains of 0.7 μm in average diameter. The result of mechanical tests indicates that better properties, with comparison to its coarse-grained counterpart, were obtained, including doubled yield strength, high hardness, good work hardening and reliable elongation. Cross effect was observed during tensile process and interpreted from point view of conventional dislocation movement. 相似文献
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随着国内外铁矿石市场竞争的日趋激烈和全球钢铁业从高速增长向平稳增长转折,国内冶金矿山企业科学发展面临着新的抉择;球团矿应用市场的广阔,使之成为国内冶金矿山企业价值创新的新"蓝海". 相似文献
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An energy based regression method to estimate critical crack-tip-opening-angle ( $\hbox {CTOA}_\mathrm{C}$ ) of high strength and toughness pipeline steels has been established derived from the Martinelli-Venzi ductile fracture model. Key curve method was applied onto the load-displacement curves of standard pressed-notch drop-weight-tear-test specimens to evaluate the dynamic crack extension, providing a way to verify the correlation between the load and remaining ligament width. In the meanwhile, the material based parameter ( $\hbox {A}^{*} \upsigma _\mathrm{f}$ ), usually required by other $\hbox {CTOA}_\mathrm{C}$ estimation algorithm, could also be determined experimentally. As a result, $\hbox {CTOA}_\mathrm{C}$ of a typical high grade pipeline steel plate was acquired as a constant over steady-state stage during crack propagation, independent of specimen geometry. 相似文献
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简述了分子筛吸附系统蒸汽加热器的工作过程。分析分子筛蒸汽加热器发生的三起事故原因。总结操作方法及教训,保证设备安全运行。 相似文献
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通常采用无铬耐指纹钝化表面处理手段提高镀锌板表面的耐指纹性能、耐腐蚀性能、自润滑性能和导电性能。结合国内外的相关研究结果,本文主要概述了耐指纹钝化的研究状况以及无铬耐指纹钝化液的主要组分,并对各组分的作用进行了介绍。功能性纳米填料一纳米SiO2,是使无铬钝化液具有耐指纹性的主要因素,其制备以及表面改性一直是耐指纹钝化的研究重点,本文对其制备及改性进行了详细论述,并对无铬耐指纹钝化发展前景进行展望。 相似文献