共查询到20条相似文献,搜索用时 15 毫秒
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Kolbasnikov N. G. Kuzin S. A. Teteryatnikov V. S. Zhukov N. V. Adigamov R. R. Sakharov M. S. Matveev M. A. 《Metal Science and Heat Treatment》2022,64(1-2):71-79
Metal Science and Heat Treatment - The effect of parameters of hot rolling and controlled cooling on formation of the martensite-austenite component of bainitic and ferritic-bainitic structures in... 相似文献
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Kolbasnikov N. G. Sakharov M. S. Kuzin S. A. Teteryatnikov V. S. 《Metal Science and Heat Treatment》2021,63(1-2):63-69
Metal Science and Heat Treatment - A concept is developed for assessing the stability of untransformed austenite entering the martensite-austenite component of a bainitic structure, which is... 相似文献
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铬锰氮双相不锈钢过冷奥氏体热稳定性的研究 总被引:1,自引:0,他引:1
用膨胀仪和X射线衍射仪对铬锰氮双相(M+A)不锈钢过冷奥氏体在Ms点附近在热稳定性进行了定量研究。结果表明,0Cr13Mn8N钢在Ms点附近等温停留时出现显著的热稳定化现象,在170℃和100℃等温停留所引起的奥氏体增加量最大值分别达到20.2%和11.1%。 相似文献
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In this work, the effect of prior cold deformation on the stability of retained austenite in GCr15 bearing steel was investigated after quenching and tempering treatment. The thermal stability was evaluated by calculating thermal activation energy for decomposition of retained austenite using differential scanning calorimeter. The mechanical stability was investigated according to the strain-induced martensitic transformation behavior of retained austenite under the standard compression testing. It is found that the prior cold deformation not only accelerates the carbide dissolution during the austenitization process but also contributes to the carbon partitioning in the tempering stage due to the higher density of phase boundaries, which results in the improvement of the thermal stability of retained austenite. Due to the enhanced carbide dissolution, the higher carbon content in the prior austenite will intensify the isotropic strain of martensitic transformation. As a consequence, the film-like retained austenite is likely to form under a higher hydrostatic pressure and thus shows a higher mechanical stability. Additionally, it is noteworthy that the benefits of the prior cold deformation to the stability of retained austenite would be saturated when the cold deformation degree is larger than 40%. 相似文献
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加热及变形温度对含铌高碳钢奥氏体组织的影响 总被引:1,自引:1,他引:0
针对铌微合金化高碳钢线材,在Gleeble-1500热模拟实验机上研究不同加热及变形温度下奥氏体组织的变化规律.结果表明.奥氏体粗化温度为1200℃,在1150~1200℃,奥氏体晶粒平均尺寸增大约30 μm;材料1100℃奥氏体化后,以40 s~(-1)、35%变形量进行一道次压下变形,1000℃以上为再结晶区,900℃以下为未再结晶区:在900℃形变淬火,析出物为NbC,尺寸为20~60nm,弥散细小的NbC析出颗粒阻碍了晶粒的长大. 相似文献
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用GLEEBLE-1500热模拟试验机研究了热变形条件对18Mn-18Cr-0.5N钢流变应力的影响,建立了数学模型,并近似计算了护环毛坯的变形抗力。 相似文献
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轧制过程中钢的奥氏体变形与再结晶 总被引:1,自引:0,他引:1
本文介绍了热轧过程中奥氏体形变和再结晶,使我们了解在控制轧制过程中如何利用奥氏体的形变和再结晶的过程来达到提高钢的强度、韧性的目的。 相似文献
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直缝埋弧焊管JCOE生产线的关键工艺之一是折弯成型工艺。对钢板在折弯成型过程中的变形规律进行了详细的分析,发现在直缝埋弧焊管成型后钢板的中性层内移,导致钢管周长增加、壁厚变薄;并对测量数据进行分析,验证了有关理论。通过此项研究,有利于合理设定直缝埋弧焊管成型参数和确定原料钢板的宽度,对提高钢管质量和减少材料的损耗有重要意义。 相似文献
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Metal Science and Heat Treatment - The laws of formation of austenite grains in steel 55 under heating from the ferrite-pearlite range to the austenite range are studied. The sizes of the former... 相似文献
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形变12CrMOV钢热浸铝的镀层组织及形成机制 总被引:5,自引:0,他引:5
用金相显微镜、透射电子显微镜及X射线衍射仪对形变热浸镀铝的镀层微观组织进行了分析,并探讨了其形成机制。所得结果对完善形变钢热浸镀铝的镀层组织及形成机制提供一定的参考依据,对制定形变件的浸镀工艺也有一定的指导意义。 相似文献
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通过热模拟和热处理试验研究了欧标S355J2微合金结构钢奥氏体晶粒的长大规律。热模拟焊接的试验结果表明,当峰值加热温度低于1250℃时,S355J2钢焊接热影响区(HAZ)奥氏体晶粒较细小,并随着保温时间的延长而不断长大;当峰值加热温度高于1250℃时,奥氏体晶粒急剧长大,长大幅度随着保温时间的延长而减小。热处理试验结果为,在低于1050℃加热时,S355J2钢奥氏体晶粒较细小,并且随着保温时间的延长奥氏体晶粒长大不明显;当加热温度高于1200℃时,奥氏体晶粒急剧长大,并且随着保温时间的延长长大幅度较大。 相似文献
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