65Mn优碳钢板生产工艺探讨

结合优质碳素结构钢板65Mn成分及性能特点,进行实验室研究,对钢板的成分、组织、性能进行了分析,着重对不同正火温度下钢板的力学性能变化进行了对比研究,找出了影响钢板延伸率不合格的主要因素,确立了最佳生产工艺路线及热处理制度,为济钢进行工业化生产、开发更高级别的中高碳钢提供了理论依据.     

Q345E钢板低温冲击不合的原因分析与改进

针对12~18 mm厚度Q345E低合金结构钢板低温冲击性能的影响因素进行分析和研究,结果表明,钢板中心偏析、带状组织是低温冲击性能不合格的主要原因。通过成分优化以及生产工艺改进,改善了Q345E钢板的低温冲击韧性,同时产品合格率也得到显著提高。     

15MnNiNbDR钢板的试制与性能研究

湘钢通过对15MnNiNbDR钢板的成分设计、生产工艺路线设计、生产工艺的分析,研究了试制15MnNiNbDR钢板的力学性能及焊接性能,观察了钢板在不同冷却速度下以及实际大工业生产中轧态、正火态的金相组织。分析研究结果表明:钢板成分设计、生产工艺路线设计合理;钢板生产工艺制定准确、易于实现;钢板成分均匀、钢质纯净;钢板性能稳定、焊接性能良好。所开发的15MnNiNbDR钢板满足交货技术条件要求,产品实物质量优于国标要求,达到产品开发的目的。     

Q345qD桥梁钢板的开发试制

介绍了柳钢试制开发Q345qD桥梁钢板的过程、生产工艺及性能情况，分析化学成分、生产工艺对其性能的影响以及应对措施。     

镀层用热轧高强度结构钢板Q460DC的开发

通过对钢板化学成分、生产工艺、组织结构、力学性能、热镀锌性能和焊接性能进行研究,开发出镀层用热轧高强度结构钢板Q460DC。实际应用表明,该钢板综合性能良好,可满足热镀锌钢板塔制造的要求。     

≥550MPa级低合金高强度钢板的研制与开发

本文介绍了重钢开发研制CGQ550D钢板的主要工艺和技术难点,分析了生产工艺、组织、成分与性能的关系。通过研究表明,采用低碳贝氏体钢成分设计,利用控轧控冷加热处理工艺可以生产出合格的550MPa级钢板。     

高强度调质钢XG960E的开发

介绍了湘钢高强度调质钢板XG960E的开发,包括成分设计原则、生产工艺控制要点、钢板组织形貌、实物性能及焊接性能评定等。XG960E钢板具有高强度、高韧性和良好的焊接性能,是制造大型风机叶轮、高端液压支架推移杆部件和大型汽车起重机主臂的理想材料。     

锅炉用耐热钢板的生产

本文结合锅炉用耐热钢板12CrlMoVg的冶炼、轧制和热处理工艺,对成分、组织及性能进行了分析,确立了最佳生产工艺路线,为开发更高级别的承压设备用钢提供了依据。     

舞钢核安全二、三级压力容器用15MnNi钢板的研制开发

通过对核安全二、三级压力容器用15MnNi钢板的成分、生产工艺、力学性能及金相组织进行分析,研究了工艺参数对力学性能、金相组织的影响,成功开发出实物质量优良的15MnNi钢板.     

高强度船板NVD(E)420钢板的研制开发

介绍了高强度船板NVD(E)420的生产工艺及性能,对钢板的成分-淬火组织及性能进行了研究。通过合理的低成分设计并结合现场生产经验,研究了工艺参数对力学性能的影响,找出合理的工艺参数,得到良好的实物性能,为在该领域向更高级别、更大厚度船板的开发提供了技术储备。     

大厚度以轧代锻20MnNiMo钢板的研制开发

介绍了大厚度以轧代锻20MnNiMo钢板的生产工艺及实物性能，对钢板的成分、组织及性能进行了研究。通过合理的成分和工艺设计，得到良好的实物性能，为国家重大工程项目建设提供了坚实技术支撑。     

Prospects of nanoparticle application in contact materials of urban electric transport

Investigation results for electrocontact materials based on silver and copper and modified by nanoparticles are presented. Their optimum compositions; technological production features; and physical, mechanical, and operational properties are determined and the microstructure is studied. It is shown possible to replace the standard, widely applied electrocontact materials and Ag-containing products with copperbased pseudoalloys with nanoparticle additives. Prospects of innovation for the investigative results are considered.     

大规格Nb微合金化HRB400钢筋的开发

介绍大规格HRB400Nb微合金化热轧带肋钢筋的开发情况, 对影响钢筋性能的因素进行了分析.采用合适的成分及控轧控冷工艺,可以控制大规格热轧带肋钢筋的组织和性能.     

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The low carbon and alloying steel can obtain higher strength, better plasticity and toughness by bainitic strengthening. And through thermal mechanical control processing (TMCP) technology, the properties and microstructure of the steel could be controlled, so the low cost and high weldability can be ensured, thus, this steel grade process extensive prospect of development and application. But the bainitic steel with more than 900MPa yield strength has not produced through industrial-scale production for the complexity of bainite transformation. Therefore, the effect of microalloying elements was analyzed, mechanical properties of steel with various bainitic morphologies were compared, different preparing technologies applied to get bainite were summarized, and the characteristic destination microstructure of bainitic steel with yield strength of 900MPa and total elongation of 15% was presented.     

Effects of TMCP Parameters on Microstructure and Mechanical Properties of Hot Rolled Economical Dual Phase Steel in CSP

 Effects of chemical compositions, finish rolling temperature, isothermal temperature on runout table and coiling temperature on microstructure and mechanical properties of economical dual phase steel produced on CSP line were investigated. Experimental results showed that martensite volume fraction could be enhanced and banding microstructure could be reduced by controlling Mn, Si contents and applying proper finish rolling temperature. Optimized processing-parameters were obtained for DP580 production on CSP line of Wuhan Iron and Steel (group) Co (WISCO) in China. Optimal microstructure and mechanical properties could be achieved when the strip was finished rolling at the range of 790 to 830 ℃, isothermally holding at 680 to 740 ℃ and coiling below 250 ℃.     

TMCP工艺生产E420海洋平台用钢板的组织与性能研究

介绍了E420海洋平台用钢板的成分性能要求,根据成分和工艺参数对力学性能的影响,对采用TMCP工艺生产的钢板组织与性能进行了研究,通过回火工艺验证,最终成功研发出组织和性能符合要求的E420钢板,为更高级别、更大厚度海洋平台用钢板的开发提供了技术储备。     

Spark Plasma Sintering Nd-Fe-B Permanent Magnets With Good All-Around Property

In present study, sintered Nd-Fe-B permanent magnets with different compositions were fabricated by using both Spark Plasma Sintering (SPS) technique and conventional sintering technique. Microstructure and compositions of both magnets are observed by scanning electron microscope with energy dispersive X-ray detector. Magnetic properties, mechanical properties, and chemical stabilities of both Nd-Fe-B magnets are investigated. Compared with the conventional sintered magnets, SPS Nd-Fe-B magnets possess comparable magnetic properties, better corrosion resistance and mechanical properties. Further investigation shows that the good all-around properties of the SPS magnets result from their unique microstructure. In detail, the grain size of Nd₂Fe₁₄B main phase is fine and uniform, only a few Nd-rich phase forms along the grain boundaries of Nd₂Fe₁₄B, while most of them agglomerates into the triple junctions. As a result, SPS process is expected to be a promising method for the production of new Nd-Fe-B magnets with good all-around properties.     

调质钢棒材组织性能预报软件的开发和应用

 介绍了调质钢棒材组织性能预报软件的开发和应用情况，模拟了从轧制到调质整个工艺过程中的温度场、轧制负荷、组织性能、热处理效果等。轧制负荷的计算研究中，考虑了奥氏体再结晶软化不充分对轧制负荷的影响。温度场的计算中，实现了VB和ANSYS之间的相互调用，相变量化分析计算中充分考虑了影响CCT曲线位置的因素，并对CCT曲线进行解析化处理，有效提高了组织转变的预报精度。软件的实际应用表明，无论是热轧态还是调质态，组织性能的预报值均与现场实测值基本相符，对改善产品的组织性能，提高产品合格率，具有重要的参考价值。