S30403+Q345R轧制复合钢板冷旋压成形工艺性能试验研究

冷旋压成形(二步法)技术已广泛地应用于压力容器封头的制造。复合钢板封头的冷旋压成形不仅冷作硬化倾向大,而且易开裂或撕裂、产生剥离等。经过装备、技术提升和多年的经验积累,压力容器用爆炸焊接复合钢板封头的冷旋压成形技术已经成熟。对采用真空焊接轧制复合工艺开发的基材为Q345R、覆材为S30403的轧制复合钢板进行冷旋压成形工艺性试验,验证了轧制复合钢板冷成形工艺性及其对基材力学性能、工艺性能和覆材耐腐蚀性能的影响以及消除应力热处理对覆材耐腐蚀性能的影响。

Effect of heat treatment on microstructure and mechanical property of Ti-steel explosive-rolling clad plate

The effect of heat treatment on microstructure and mechanical properties of the Ti-steel explosive-rolling clad plate was elaborated by optical microscopy （OM）, scanning electron microscopy （SEM）, X-ray diffraction （XRD）, transmission electron microscopy （TEM）, micro-hardness test and shear test. The composites were subjected to heat treatment at temperature of 650-950 ~C for 60 min. The results show that the heat treatment process results in a great enhancement of diffusion and microstructural transformation. The shear strength decreases as the treatment temperature increases. Heated at 850 ℃ or below, their shear strength decreases slowly as a result of the formation of TiC in the diffusion interaction layer; while at the temperature of 850 ℃ or above, the shear strength decreases obviously, which is the consequence of a large amount of Ti-Fe intermetaUics （Fe2Ti/FeTi） along with some TiC distributing continuously at diffusion reaction layer.

轧制复合板在CAP1400安注箱制造中无损检测问题探讨

基于复合板的材料特性,国内核电设备中很少使用,大多采用低合金钢板堆焊不锈钢或直接采用不锈钢钢板制造。目前,国核示范工程CAP1400安注箱项目首次采用国产轧制复合钢板制造。笔者通过对该项目制造过程中从复合板原材料阶段到设备制造阶段的无损检测相关问题进行分析总结,为后续该类材料的使用、设备的设计和相关标准的制定提供参考。