XIAN Aiping LI Peiji CHEN Wenxiu WANG Yikang Institute of Metal Research
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Academia Sinica
,
Shenyang
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ChinaCHEN Renvi MEI Dongsheng Panzhihua Institute of Iron and Steel Research
,
Ministry of Metallurgical Industry
,
Panzhihua
,
China associate professor
,
Institute of Metal Research
,
Academia Sinica
,
Shenyang 110015
,
China
金属学报(英文版)
The determination of dffusible hydrogen in U71Mn heavy rail steel,and hydrogen diffusivity as well as the hydrogen distribution in the cross section of blooms with stack cooling were stu- died.The results showed that,most of the hydrogen in blooms of heavv rail steel is diffusible, the hydrogen diffusivity in U71Mn rail steel blooms at room temperature is(0.85—1.02)× 10~(-6)cm~2/s,after stack cooling,the hydrogen content in bloom will decrease greatly which is helpful to form the flake-free phenomenon in the heavy rail produced by Panzhihua Iron and Steel Company.
关键词:
rail steel
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null
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null
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null
XIAN Aiping LI Peiji CHEN Wenxiu WANG Yikang Institute of Metal Research
,
Academia Sinica
,
Shenyang
,
ChinaCHEN Renyi MEI Dongsheng Panzhihua Institute of Iron and Steel Research
,
Panzhihua
,
China associate professor.Institute of Metal Research
,
Academia Sinica
,
Shenyang 110015
,
China
金属学报(英文版)
At panzhihua Iron and Steel Company,hydrogen content in molten heavy rail steel is rather low during smelting in the oxygen top-blown converter,and sloightly increases in tapping and pouring.Average H content varies from 2.0(dry season)to 2.4 ppm(rainy season)at smelt- ing end;2.8 ppm in ladle;and 2.1 ppm(dry season)to 2.3 ppm(rainy season)in mould, which is on a level with RH vacuum circle.The low hydrogen content in molten steel,which is due to both the very dry climate in Panzhiihua region and the LD smelting process,is the main reason why there is little flake in the heavy rail produced by Panzhihua Iron and Steel Com- pany.
关键词:
smelting
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null
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null
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null
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null
吴庆辉
,
杨忠民
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杨超飞
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陈颖
,
王慧敏
钢铁
通过在Gleeble-1500热模拟试验机上对珠光体钢轨的轧后热处理模拟试验,研究了热轧后不同加热温度进行奥氏体化后,同一等温温度下得到的珠光体轨钢的显微组织和力学性能。试验结果表明：与热轧态相比,热处理后的钢轨钢在保持硬度稳定的基础上,冲击韧性随着奥氏体化温度降低得到明显改善。观察轧后热处理钢轨的组织,从原始奥氏体晶粒尺寸、相变后珠光体组织中珠光体域的尺寸和珠光体片层间距大小等方面,对轧后热处理温度对热轧钢轨性能的影响规律和原因进行了分析,阐明了轧后热处理温度对于控制珠光体钢轨的组织和性能的影响作用。
关键词:
热处理温度
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珠光体
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钢轨
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韧性
杨森祥
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黄德胜
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曾建华
钢铁
钢轨钢对钢水洁净度和非金属夹杂物控制均有较高要求.针对高硫铁水冶炼现状,为实现钢轨钢的洁净生产,攀钢在铁水预处理、转炉冶炼、钢水精炼方面进行了硫控制技术的开发与应用,形成了提高钢的洁净度和控制钢中非金属夹杂物的数量和形态的洁净钢生产工艺技术,实现了350 km/h高速铁路用钢轨的生产.高速轨成品w([S])≤0.008％的合格率达到95％以上,钢轨w(T[O])降至0.001 5％以下,夹杂物的分布形态得到有效控制.
关键词:
洁净钢
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硫控制
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钢轨钢
朱敏
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徐光
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王瑞敏
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刘文艳
钢铁研究
在Formastor-F试验机上进行热模拟试验,测定了U77CrNb钢轨钢临界点及在0.2～30℃/s冷却速度下连续冷却转变的温度膨胀曲线.试验结果表明:冷却速度≤1℃/s时,可获得屈氏体+珠光体组织;冷却速度达到2℃/s时,钢中出现马氏体组织.测定的连续冷却转变曲线为制定U77CrNb钢轨钢生产及热处理工艺提供了理论依据.
关键词:
U77CrNb
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钢轨钢
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连续冷却转变曲线
