共查询到19条相似文献,搜索用时 93 毫秒
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介绍了宣龙高速线材有限责任公司利用先进的控轧控冷技术进行大规模高附加值的高速线材生产,通过合理控制钢的化学成分、加热温度、轧制温度、变形量、变形速度及冷却速度,生产精品高速线材。 相似文献
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通过合理控制钢加热温度、轧制温度、变形量、变形速度及冷却速度等控轧控冷技术手段,在国产全连续式高速无扭线材轧钢生产线上,对高碳钢77B、82B线材的控轧控制冷工艺进行探索,通过不断改变工艺参数及采取多项措施,其产品力学性能基本达到预期效果,为批量生产提供了依据。 相似文献
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本文就热变形工艺参数对DH36热轧船板用钢组织变化规律进行了模拟研究,总结了γ→a相变后铁素体晶粒大小随变形量、终轧温度、冷却速度的变化规律,并借此讨论了DH36钢控轧控冷工艺。 相似文献
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通过测试DH36钢连续冷却转变曲线,对其不同变形量及变形温度条件下单道次轧制后奥氏体再结晶百分比进行了测定。结合控轧控冷生产实践与分析现场轧制数据,认为DH36钢的最佳终轧温度为800~830℃、冷却速度5~7℃/s、最佳终冷温度685~715℃,在此工业条件下生产DH36钢的低温冲击韧性符合船级社要求。 相似文献
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为了解奥氏体在连续冷却过程中的组织演变规律,更好地控制管线钢室温下的组织形态,对X70管线钢进行了静态及动态热模拟试验,绘制出了相应的连续冷却转变曲线(CCT曲线),观察其组织,分析变形和冷却速度等因素对管线钢组织的影响。同时对X70管线钢的入精轧温度、终轧温度等因素控轧控冷工艺进行模拟研究。认为提高变形后的冷却速度能获得针状铁素体组织;在同一冷却速度下,动态连续冷却转变得到的组织更细密;降低入精轧温度、终轧温度,增加冷却速度能细化组织。 相似文献
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K. Ramanjaneyulu G. Madhusudhan Reddy A. Venugopal Rao 《Transactions of the Indian Institute of Metals》2014,67(5):769-780
The influence of tool shoulder diameter and its rotational speed on the high temperature plastic deformation of the material during friction stir welding of AA 2014 aluminum alloy is investigated, using the principles of hot working. The soundness of weld and defect formation are analyzed using the Zener–Hollomon parameter ‘Z’ to describe the high temperature plastic deformation behaviour of material, under the simultaneous influence of temperature and strain-rate. The observed hot deformation behaviour is correlated with the deformation processing map for the first time. At a given rotational speed, the volume of shoulder driven flow reduces with increasing shoulder diameter. 相似文献
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DU Lin-xiu ZHANG Zhong-ping SHE Guang-fu LIU Xiang-hua WANG Guo-dong 《钢铁研究学报(英文版)》2006,13(3):31-35,50
The dynamic recrystallization and static recrystallization in a low carbon steel were investigated through single-pass and double-pass experiments. The results indicate that as the deformation temperature increases and the strain rate decreases, the shape of the stress-strain curve is changed from dynamic recovery shape to dynamic recrystallization shape. The austenite could not recrystallize within a few seconds after deformation at temperature below 900 ℃. According to the change in microstructure during deformation, the controlled rolling of low carbon steel can be divided into four stages: dynamic recrystallization, dynamic recovery, strain-induced ferrite transformation, and rolling in two-phase region. According to the microstructure after deformation, the controlled rolling of low carbon steel can be divided into five regions: non-recrystallized austenite, partly-recrystallized austenite, fully-recrystallized austenite, austenite to ferrite transformation, and dual phase. 相似文献
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Controlled Rolling and Controlled Cooling Technology of Ultra-High Strength Steel with 700 Mpa Grade 总被引:1,自引:0,他引:1
With Gleeble-1500 system, the influences of rolling temperature, finishing tempera ture and cooling rate on the mechanical properties of two ultra-high strength steels were analyzed. The microstructure of the hot rolled specimens was observed by optical microscope, TEM and SEM. The TRIP of HSLA steels was studied. The results show that the yield stress of 700 MPa can be reached for two steels. The controlled rolling and controlled cooling technology has different effects on two sleds, but it is rational to adopt finishing temperature 800℃ for both of them. The microstructure of the steels is mainly bainite, and the influence factors ofmechanical properties are the size of bainite, and the size, distribution, composition and morphology of secondary phases. The deformation of high molybdenum steels at a high temperature with a high cooling rate would promote TRIP. 相似文献