摘要：【中文】本发明公开了一种6mm厚核电安全壳用钢及其制造方法，其采用低C、Mn成分系列设计，不另外添加合金成分，在确保屈服强度稳定性的同时兼顾辐照效应。该制造方法对坯料料型的优化实现了轧制过程中轧件长度的有效控制，避免了轧件过长带来的温度波动较大。采用超高温加热制度保证了坯料在轧制时获得较高的温度，确保轧制完成后，钢板具有较高的终轧温度。对轧制工序的控制减少了过程中温降，确保轧件头尾温差波动较小。优化轧件放尺长度并切除板型较差区域，保证了取样位置的性能均匀性。利用该方法生产的6mm核电用钢，屈服强度控制稳定，得到的性能强韧性匹配优异，完全满足性能要求。生产的性能合格率达到94％，完全适应工业批量化生产。 【EN】The invention discloses steel for a 6mm thick nuclear power containment and a manufacturing method thereof, wherein the steel adopts a low C, Mn component series design, does not add alloy components, ensures the stability of yield strength and simultaneously considers the irradiation effect. The manufacturing method optimizes the blank material type, realizes effective control of the length of the rolled piece in the rolling process, and avoids large temperature fluctuation caused by overlong rolled piece. The adoption of an ultra-high temperature heating system ensures that the blank obtains higher temperature during rolling, and ensures that the steel plate has higher finish rolling temperature after the rolling is finished. The control on the rolling process reduces the temperature drop in the process and ensures that the head-tail temperature difference fluctuation of the rolled piece is small. The length of the rolled piece is optimized, the area with poor plate shape is cut off, and the performance uniformity of a sampling position is guaranteed. The 6mm nuclear power steel produced by the method has stable yield strength control, excellent performance, toughness and matching, and completely meets the performance requirements. The qualified rate of the production performance reaches 94%, and the method is completely suitable for industrial batch production.

摘要：【中文】本发明公开了一种铁路转向架用Q345C钢板及其制造方法，通过低C、微合金、低杂质含量成分的设计思路，有效的保证了钢板交货状态和模拟焊后强度均符合技术要求，避免交货状态的强度符合而模拟焊后强度下降，导致模拟焊后强度不合格的情况。其制造方法采用洁净钢冶炼技术，降低了气体和非金属夹杂物的含量，连铸工序全称无氧化，结合凝固末端轻压下和电磁搅拌技术，得到高纯洁净度的连铸坯，确保铸坯平整及内部金属致密。两阶段轧制技术，细化了奥氏体和铁素体的晶粒度，获得以细小的铁素体为基体+均匀分布的珠光体的内部组织。得到的钢板具有优异的低温冲击韧性、良好的焊接性能且组织纯净度高，能够满足当前铁路转向架的技术要求。 【EN】The invention discloses a Q345C steel plate for a railway bogie and a manufacturing method thereof, which effectively ensure that the delivery state and the simulated post-welding strength of the steel plate meet the technical requirements through the design idea of low C, microalloy and low impurity content components, and avoid the condition that the simulated post-welding strength is unqualified due to the fact that the strength in the delivery state meets and the simulated post-welding strength is reduced. The manufacturing method adopts a clean steel smelting technology, reduces the content of gas and non-metallic inclusions, has a full-name non-oxidation continuous casting process, combines a solidification tail end soft reduction and an electromagnetic stirring technology to obtain a continuous casting blank with high purity, and ensures that the casting blank is flat and the internal metal is compact. The two-stage rolling technology refines the grain sizes of austenite and ferrite, and obtains an internal structure with the fine ferrite as a matrix and pearlite uniformly distributed. The obtained steel plate has excellent low-temperature impact toughness, good welding performance and high structure purity, and can meet the technical requirements of the current railway bogie.

摘要：【中文】本发明所述的一种提升铁路用钢板低温冲击韧性的方法，该方法针对未大量加入合金元素、成分体系保持碳当量＜0.45的铁路用钢板。在氮气保护下采用辐射管加热，对钢板进行中温回火处理，避免钢板表面氧化，同时通过精准的炉温、升温速率、保温时间等回火工艺参数控制，保障钢板受热均匀，非碳化物形成元素逐步富集和球化，从而发生更稳定的碳化物逐渐代替原先不稳定的碳化物，确保组织性能的均质性，组织结构稳定性得到有效提高。从而有效提升了轧态交货厚板的低温冲击韧性，提高了性能合格率指标，降低钢板因性能不合的改判量，保证了批量生产时的成本控制。 【EN】The invention relates to a method for improving low-temperature impact toughness of a steel plate for a railway, which aims at the steel plate for the railway with a carbon equivalent of less than 0.45 which is not added with a large amount of alloy elements and is kept in a component system. The steel plate is heated by adopting the radiant tube under the protection of nitrogen, medium-temperature tempering treatment is carried out on the steel plate, the surface oxidation of the steel plate is avoided, meanwhile, the uniform heating of the steel plate is ensured through the control of tempering process parameters such as accurate furnace temperature, heating rate, heat preservation time and the like, and non-carbide forming elements are gradually enriched and spheroidized, so that more stable carbide is generated to gradually replace original unstable carbide, the homogeneity of the tissue performance is ensured, and the stability of the tissue structure is effectively improved. Therefore, the low-temperature impact toughness of the rolled delivery thick plate is effectively improved, the performance percent of pass is improved, the improvement amount of the steel plate due to the improper performance is reduced, and the cost control during batch production is ensured.

摘要：【中文】本发明公开了一种超宽特厚钢质安全壳核电用钢的轧制方法，该方法根据目标钢板规格选择坯料，保证压缩比≥3，保障轧制过程钢板在厚度方向的变形量；采用高温加热坯料并配以合适的均热时间和温度均匀性等工艺参数，实现坯料充分奥氏体化，合金成分均匀化；道次间冷却轧制工艺技术，使得坯料近表层金属表现出更难变形的状态，由表面至心部得到硬度梯度，从而得到心部变形量增大的趋势，获得有效的心部轧制渗透效果。能够成功轧制厚度覆盖60‑101mm，宽度覆盖4000‑4600mm规格的钢板，并保证钢板性能具有强韧性匹配优异，心部性能沿钢板宽度方向均质性良好的特点。 【EN】The invention discloses a rolling method of ultra-wide and ultra-thick steel containment nuclear power steel, which selects a blank according to the specification of a target steel plate, ensures that the compression ratio is more than or equal to 3, and ensures the deformation of the steel plate in the thickness direction in the rolling process; the blank is heated at high temperature and is matched with proper technological parameters such as soaking time, temperature uniformity and the like, so that the full austenitization of the blank is realized, and the alloy components are homogenized; the inter-pass cooling rolling technology enables the metal near the surface layer of the blank to show a more difficult-to-deform state, and obtains a hardness gradient from the surface to the core, thereby obtaining the trend of increasing the deformation of the core and obtaining the effective core rolling infiltration effect. The steel plate with the thickness covering 60-101mm and the width covering 4000-4600mm can be successfully rolled, and the characteristics of excellent obdurability matching and good homogeneity of the core performance along the width direction of the steel plate are ensured.