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采用直接淬火和回火工艺生产高强度钢板 总被引:1,自引:0,他引:1
1 前言 直接淬火(DQ)工艺已应用于高强度钢板生产中。对直接淬火工艺的冶金研究证明,在奥氏体化后采用直接淬火有成功的工艺效果。直接淬火后,钢板淬硬性比传统再加热淬火(RQ)工艺条件下增大了1.4到1.5倍。结合生产条件,研究了合金元素对机械性能的影响。结果证明,在钢板轧制生产线上安装直接淬火设备后,已经开发出大量热输入焊接用的HT-—60和HF-—80钢,其特点是改善了焊接性能并且减少了合金元素量。 相似文献
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简要介绍了轧后直接淬火的技术特点和强韧机理,详细分析了应用于中厚板生产中的直接淬火关键技术和典型结构,重点列举了直接淬火技术在高强度中厚钢板生产中的应用情况。 相似文献
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《钢铁研究学报(英文版)》2011,(Z1):432-436
To develop the Q960 high-strength quenched and tempered steel plates for construction machinery,the effects of quenching and tempering treating regime on the microstructures and mechanical properties were investigated.The results show that the perfect austenization and fine grain size can be achieved by the optimum quenching process that is quenching temperature 900℃ and holding time 20min.Considering performance and production efficiency,the optimum tempering process parameters are found that tempering temperature 600℃ and holding time 40min.The excellent overall properties of specimens with tempered sorbite microstructure can be ultimately obtained.The yield strength is 1030MPa,tensile strength 1080MPa,percentage elongation 16.8% and the Charpy impact energy 144J at-40℃.All these indexes come up to the National Standard GB/T 16270-2009. 相似文献
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Feng LU Chao WANG Long L Zhao-dong WANG Guo-dong WANG Raja Devesh Kumar MISRA 《钢铁研究学报(英文版)》2015,22(4):344-351
A high strength low alloy steel with low carbon equivalent was selected for simulating online direct quenching and coiling(DQ-C)process.The influence of stop quenching temperature on mechanical properties and microstructures was studied and compared with normal direct quenching and tempering(DQ-T)process.The study confirmed that required mechanical properties were obtained for both the processes.Properties of the experimental steel with DQ-C process could reach the same level as that of DQ-T process in general.In the DQ-C process,strength decreased with increase in stop quenching temperature.Martensite was obtained and experienced an aging process at stop quenching temperature below Mf.On fast cooling below Ms,martensite was partially transformed and carbon partitioning occurred during slow cooling.The reduction in solid solution carbon and increased amount of retained austenite led to lower strength compared with the DQ-T process.DQ-C process was more favorable for microalloy carbide precipitation.However,impact toughness under different cooling conditions was adequate because of low carbon equivalent and refined microstructure. 相似文献
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钢板轧制后直接淬火工艺研究 总被引:2,自引:0,他引:2
钢板轧制后进行在线热处理既省时、节能又可提高钢板质量,这项新技术起源于70年代,现在世界上许多国家已开始采用这项工艺,介绍了在线热处理对淬火设备的要求、冷却方式的选择以及目前存在的问题。 相似文献
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调质工艺在中厚板产品开发方面的应用探讨 总被引:1,自引:0,他引:1
中厚板进行调质处理的钢种有高强钢、压力容器和锅炉用钢、耐磨钢及油罐钢等,影响钢板淬火质量的关键因素是加热温度,保温时间,冷却条件,钢板头部、尾部和板角质量,喷淋水等。济钢应充分发挥新上调质线的作用,开发高强度结构钢、压力容器钢、低合金结构钢和耐磨耐候钢,增强济钢在高端产品上的国际竞争力。 相似文献
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为改进调质态超高强海洋工程用钢的力学性能,研究了2炉不同硼含量的钢。经控制轧制后,在实验室条件下采用不同回火温度处理以确定最佳热处理温度,并对实验钢板进行金相组织观察,利用扫描电镜和透射电镜讨论分析了硼及回火温度对组织、性能的影响。实验结果表明,硼有利于提高钢板的淬透性,含硼钢600℃回火可以满足E690的性能要求;随回火温度的提高,含硼钢和无硼钢的强度降低,伸长率升高,含硼钢的变化幅度比无硼钢大;含硼钢在630~660℃存在明显的回火脆性区,而无硼钢具有较好的回火稳定性;无硼钢在650℃回火可以满足E550的性能要求。 相似文献
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介绍了扇形齿轮经开齿后调质的一种工艺方法,调质时采取新型的防变形工装制具,减小了扇形齿轮开齿后调质的变形,保证了扇形齿轮的齿面硬度均匀,基体具有良好的综合力学性能,同时又满足了精加工的要求及精度。 相似文献