您的位置: 专家智库 > >

国家重点基础研究发展计划(2010CB630806)

作品数:33 被引量:316H指数:13
相关作者:王新华王万军张慧王明林姜敏更多>>
相关机构:北京科技大学钢铁研究总院首钢集团更多>>
发文基金:国家重点基础研究发展计划国家自然科学基金更多>>
相关领域:冶金工程金属学及工艺一般工业技术化学工程更多>>

文献类型

  • 33篇期刊文章
  • 3篇会议论文

领域

  • 26篇冶金工程
  • 11篇金属学及工艺
  • 7篇一般工业技术
  • 2篇化学工程
  • 1篇自动化与计算...

主题

  • 7篇夹杂
  • 6篇金属
  • 5篇低氧
  • 5篇凝固
  • 5篇金属夹杂物
  • 4篇偏析
  • 4篇精炼
  • 4篇非金属夹杂
  • 4篇非金属夹杂物
  • 4篇SLAG
  • 3篇冶炼
  • 3篇热力学
  • 3篇超低氧钢
  • 3篇车轮钢
  • 2篇电磁搅拌
  • 2篇氧化铝
  • 2篇冶炼过程
  • 2篇圆坯
  • 2篇杂物
  • 2篇轴承钢

机构

  • 23篇北京科技大学
  • 7篇钢铁研究总院
  • 6篇首钢集团
  • 2篇马鞍山钢铁股...
  • 1篇辽宁科技大学
  • 1篇昆明理工大学
  • 1篇首都钢铁公司

作者

  • 22篇王新华
  • 13篇王万军
  • 7篇王明林
  • 7篇张慧
  • 7篇姜敏
  • 6篇赵沛
  • 5篇马忠伟
  • 5篇景财良
  • 5篇黄福祥
  • 4篇杨俊
  • 4篇王超
  • 3篇于会香
  • 3篇杨叠
  • 3篇陶红标
  • 2篇杨光维
  • 2篇龚志翔
  • 2篇雷少龙
  • 2篇李海波
  • 2篇张静
  • 2篇许志刚

传媒

  • 7篇北京科技大学...
  • 5篇钢铁
  • 5篇特殊钢
  • 3篇Journa...
  • 2篇钢铁研究学报
  • 2篇东北大学学报...
  • 2篇炼钢
  • 2篇工程科学学报
  • 1篇铸造技术
  • 1篇钢铁钒钛
  • 1篇China ...
  • 1篇Scienc...
  • 1篇Intern...
  • 1篇第十一届中国...

年份

  • 1篇2018
  • 1篇2017
  • 1篇2016
  • 5篇2015
  • 6篇2014
  • 4篇2013
  • 5篇2012
  • 11篇2011
  • 2篇2010
33 条 记 录,以下是 1-10
排序方式:
圆坯结晶器应用电磁搅拌的物理模拟被引量:1
2013年
以某钢厂Φ500mm圆坯连铸结晶器为原型,建立了1∶1的物理模型,通过机械搅拌模拟结晶器电磁搅拌,分析研究了电磁搅拌对结晶器内钢液的流动、夹杂物去除率的影响。试验研究表明:电磁搅拌使结晶器内的钢液有一定的水平切向速度,使搅拌区钢水温度的分布更加均匀,有利于结晶器内保护渣的均匀熔化。电磁搅拌能够把水口冲击的轴向速度变为径向速度,从而大大降低流股的冲击深度,能有效地促进夹杂物的上浮和热区中心的上移。但并不是搅拌强度越大,夹杂物的去除率就越高,试验表明,在相同时间内,当搅拌强度为48r/min左右时,夹杂物的上浮率最高。
王超张慧王明林裴红彬马忠伟赵沛
关键词:电磁搅拌切向速度流场搅拌强度
精炼渣中Al2O3含量对钢洁净度的影响
为了研究精炼渣中Al2O3含量对钢洁净度,尤其是非金属夹杂物的影响,选用合结钢和高强度低合金钢两类钢种,分别开展了不同Al2O3含量的高碱度(B=CaO/SiO2,B为7左右)和中等碱度(B为3.5左右)CaO-SiO2...
于会香王新华姜敏
关键词:精炼渣洁净度
低碱度脱磷渣在转炉少渣冶炼中的作用被引量:14
2015年
以SGRS工艺为基础,研究了低碱度脱磷渣在转炉少渣冶炼中的作用.根据少渣冶炼物料平衡原理,脱磷阶段结束炉渣碱度控制越低,相当于转炉回收利用的Ca O量越多,能够实现的钢液去Si量也越多.同时实验结果表明,随着脱磷渣碱度的降低,炉渣的熔化性能逐渐改善,带来脱磷阶段结束转炉倒渣量不断增加以及脱磷渣金属铁含量不断降低的有益效果.当脱磷渣碱度在1.2~1.8范围时,脱磷渣半球点温度基本控制在1 380℃以内,脱磷渣中的游离Ca O质量分数控制在0.7%左右的较低水平,同时转炉脱磷阶段结束转炉倒渣量基本可控制在8 t(210 t转炉)或5 t(100 t转炉)以上.
何肖飞王新华梁秀兰李海波
关键词:转炉少渣冶炼脱磷矿物相
连铸参数对中间包内控流元件冶金性能的影响被引量:5
2011年
根据相似原理,以浇铸Φ380 mm铸坯的28 t 3流T型中间包为原型,通过实验相似比λ=1:2水模型,研究了拉速0.3~0.9 m/min、液位600~1200 mm连铸条件下,控流元件对中间包内流场特性的影响。结果表明,当实际生产的中间包液位为500 mm左右时,拉速<0.4 m/min时,控流元件改善其流场的作用不明显,不需加入控流元件;当拉速≥0.4 m/min和<0.7 m/min时,可选用带挡墙结构的中间包;当拉速≥0.7 m/min,可考虑挡墙加湍流抑制器的结构,以优化中间包内流场特性。通过对中间包内流场的分析得出,设置控流元件时,应尽量降低注流混乱度并使钢水湍动能尽可能多的消耗在浇铸区。
景财良王新华李林平王万军龚志翔
关键词:冶金性能
超低氧车轮钢精炼过程非金属夹杂物的转变被引量:12
2010年
研究了采用LD-LF-VD-CC工艺流程生产超低氧高速车轮钢时,精炼过程中夹杂物的生成与变化.实验在出钢时加入足够的Al进行终脱氧,LF精炼过程采用强脱氧、高碱度和强还原性精炼渣工艺,能使最终铸坯w(T.O)达到7×10-6,获得高洁净度的铸坯;而且在LF精炼过程中,夹杂物完成了Al2O3→MgO.Al2O3→CaO-MgO-Al2O3类复合夹杂物的转变,得到在炼钢温度下呈液态的复合氧化物夹杂,这些液态夹杂物通过碰撞、长大和上浮去除,残留于钢中的氧化物夹杂以较低熔点的CaO-MgO-Al2O3类复合夹杂形态存在,它们在热加工过程中可以发生稍许变形,能有效改善车轮钢的疲劳性能.
杨俊王新华王万军龚志翔汪国才唐宇
关键词:车轮钢氧化物夹杂三元相图
Cleanliness of Alloying Structural Steel被引量:4
2011年
Alloying structural steel used for mechanical structures has a high requirement for cleanliness because its failures are greatly affected by non-metallic inclusions and total oxygen content in steel.It has been reported by some steelmaking plants to have some problems in controlling total oxygen content and inclusions during alloying structural steel production.For this purpose,cleanliness control in 0.2C-0.3Si-0.6Mn-1Cr-0.2Mo steel was investigated.Firstly,low melting temperature zone(≤1873 K) of CaO-Al2O3-MgO system and formation condition of low melting temperature inclusions were investigated through thermodynamic equilibrium calculation.On this basis,industrial tests were carried out.Through sampling at different stages,transformation of oxide inclusions and change of total oxygen content in steel were studied.The results show that:in order to form CaO-Al2O3-MgO system inclusions with low melting temperature,mass percent of Al2O3,MgO and CaO in inclusions should be controlled from 37.6% to 70.8%,0 to 17.4% and 25.5% to 60.6%;For the condition of 1873 K and 0.05%(mass percent) dissolved aluminum in steel,the activities of dissolved oxygen,magnesium and calcium should be controlled as 0.298×10-4-2×10-4,0.1×10-5-40×10-5 and 0.8×10-8-180×10-8 respectively.With secondary refining proceeding,average total oxygen content and inclusion amount decrease,the type of most inclusions changes from Al2O3 after tapping to Al2O3-MgO after top slag is formed during ladle furnace refining and finally to CaO-Al2O3-MgO after RH treatment.In the final products,average total oxygen content was 12.7×10-6 and most inclusions were in spherical shape with size less than 5 μm.
YU Hui-xiangWANG Xin-huaZHANG JingLI Hai-boWANG Wan-jun
Desulfurization ability of refining slag with medium basicity被引量:5
2014年
The desulfurization ability of refining slag with relative lower basicity (B) and Al2O3 content (B = 3.5-5.0; 20wt%-25wt% Al2O3) was studied. Firstly, the component activities and sulfide capacity (Cs) of the slag were calculated. Then slag-metal equilibrium experiments were carried out to measure the equilibrium sulfur distribution (Ls). Based on the laboratorial experiments, slag composition was optimized for a better desulfurization ability, which was verified by industrial trials in a steel plant. The obtained results indicated that an MgO-saturated CaO-Al2O3-SiO2-MgO system with the basicity of about 3.5-5.0 and the Al2O3 content in the range of 20wt%-25wt% has high activity of CaO (αCaO), with no deterioration of Cs compared with conventional desulfurization slag. The measured Ls between high-strength low-alloyed (HSLA) steel and slag with a basicity of about 3.5 and an Al2O3 content of about 20wt% and between HSLA steel and slag with a basicity of about 5.0 and an Al2O3 content of about 25wt% is 350 and 275, respectively. The new slag with a basicity of about 3.5-5.0 and an Al2O3 content of about 20wt% has strong desulfurization ability. In particular, the key for high-efficiency desulfurization is to keep oxygen potential in the reaction system as low as possible, which was also verified by industrial trials.
Hui-xiang YuXin-hua WangMao WangWan-jun Wang
关键词:REFININGSLAGBASICITYDESULFURIZATION
Al脱氧钢中氧化物对MnS析出的影响被引量:20
2013年
使用10 kg真空感应炉Al脱氧冶炼较高S含量超低氧高强度钢,钢中T[O]降到0.0010%,S的质量分数为0.0190%.采用ASPEX explorer全自动扫描电镜对钢中非金属夹杂物进行检测,发现98%非金属夹杂物都是弥散分布的MnS和MnS+Al2O3复合夹杂物.MnS夹杂物棱角分明,从形貌特征来看应属于第Ⅲ类硫化物.MnS+Al2O3复合夹杂物以Al2O3为核心,外层包裹MnS,其数量约占9%~32%;作为核心的Al2O3平均直径为1.5μm.其生成过程可描述为:凝固过程中,小尺寸Al2O3被推至固液两相区,而选分结晶作用使得钢中的Mn和S在凝固前沿富集,并以Al2O3作为异质形核质点析出MnS夹杂物.对凝固过程中Al2O3的推动和捕获行为进行了相关计算.计算结果表明:直径小于4μm的Al2O3可被推动,并作为MnS的异质形核质点.
雷少龙姜敏杨叠王新华王万军
关键词:炼钢凝固硫化锰氧化铝
超低氧钢中硫化钙夹杂析出的热力学讨论及控制被引量:19
2011年
对超低氧试验钢中硫化钙夹杂析出的热力学分析表明,在本试验钢成分条件下,钢液在液相线温度以上不会自发生成硫化钙夹杂,硫化钙夹杂是钢液凝固过程中,随着钢液中[Al]、[S]溶解度的降低,[S]与钢液中较低熔点的CaO-Al2O3类及CaO-MgO-Al2O3夹杂物表层的CaO反应析出形成;同时,通过计算得到,本试验钢在凝固过程中不析出硫化钙夹杂的条件为将硫的质量分数控制在0.000 4%以下。
杨俊王新华王万军
关键词:活度系数
Effect of Calcium Treatment on Non-Metallic Inclusions in Ultra-Low Oxygen Steel Refined by High Basicity High Al_2O_3 Slag被引量:23
2011年
The influence of calcium treatment on non-metallic inclusions had been studied when control technology of refining top slag in ladle furnace was used in ultra-low oxygen steelmaking. A sufficient amount aluminium was added to experimental heats for final deoxidizing during BOF tapping, and the refining top slag with strong reducibility, high basicity and high Al2O3 in ladle furnace was used to produce ultra-low oxygen steel and the transformation of nonmetallic inclusions in molten steel was compared by calcium treatment and no calcium treatment. The results show that the transformation of Al2O3--MgO - Al2O3 spinel-CaO-MgO-Al2O3 complex inclusions has been completed for aluminum deoxidation products and calcium treatment to molten steel is unnecessary when using the control technology of ladle furnace refining top slag to produce ultra-low oxygen steel, and the complex inclusions are liquid at the temperature of steelmaking and easily removable to obtain very high cleanliness steel by flotation. Further- more, the problems of nozzle clogging in casting operations do not happen and the remaining oxide inclusions in steel are the relatively lower melting point complex inclusions.
YANG Jun WANG Xin-hua JIANG Min WANG Wan-jun
关键词:DEOXIDIZATION
共4页<1234>
聚类工具0