全国特钢生产技术专业会议在大冶钢厂召开

冶金部钢铁司于三月十日至十六日在大冶钢厂主持召开了全国特钢生产技术专业会议。冶金部总工程师陆达同志,钢铁司付司长杨栋同志,特钢处付处长卢尚汉同志等出席了会议。会上由杨栋同志作了特钢系统八三年工     

全国炉外精炼生产技术交流研讨会在太钢召开

由中国金属学会主办、太钢协办的2009年全国炉外精炼生产技术交流研讨会于8月26日至27日在花园国际大酒店举行。中国工程院院士殷瑞钰,相关科研机构、院校、全国各大钢的代表,太钢领导李晓波、胡玉亭、林企曾、张志方共200余人参加了会议。会议由中国金属学会秘书长洪及鄙主持。     

全国铁合金增产座谈会议在湖南铁合金厂召开

1983年4月20—26日,冶金部在湖南铁合金厂召开了全国铁合金增产座谈汇报会议。全国重点铁合金厂、有关省市冶金局和部分中小铁合金厂的负责同志或代表共80多人出席了会议。冶金部钢铁司负责人廉书桢同志首先在会上讲了话,他介绍了目前我国钢铁工业的生,产和发展情况,并着重指出,由于合金钢比例不断增加,钢铁工业对铁合金的数量、     

全国小型型钢生产技术交流会暨小型型钢学术委员会工作会议在广西召开

全国小型型钢生产技术交流会暨中国金属学会小型型钢学术委员会工作会议,于2003年11月10-14日在广西北海市召开。 近几年来,随着三峡工程、西部大开发、迈向“全民小康”步伐的加快,我国钢材产量连续4年超过1亿t以后,2002年又创记录地达到1.9266亿t。其中,小型材的产量由2001年     

全国第四届冷轧窄带钢生产技术经验交流会

由冶金部轧钢情报网召开的全国第四届冷轧窄带钢生产技术经验交流会,于1989年11月25～28日在浙江省宁波市举行。来自全国81个各有关单位的147名代表参加了会议。会议共收到论文40篇,大会     

第五届全国热轧窄带钢生产技术经验交流会

冶金部轧钢情报网第五届全国热轧窄带钢生产技术经验交流会于1990年6月2～5日在山东省莱芜钢铁总厂召开。来自全国各有关的生产厂、设计、研究院所等60个单位的109名代表参加了会议。大会共收到论文35篇。通过大会宣读(20篇)小会交流、代表无记名投票及专家评定的形式,选出优秀论文12篇。会上还分成①全连续和半连续窄带钢热轧机生产上存在的问题和解决措施,②扩大品种和热轧窄带钢发展方向;③现有轧机的改造和新技术的应用等3个小组进行了专题讨论。     

高压水除鳞在窄带钢生产上的应用

介绍南钢带钢厂高压水除鳞系统的主要工艺参数、设备配置以及所达到的效果。     

热轧窄带钢精轧机组中的活套自动控制

简述了对电动活套控制的要求、控制内容，对鸡西、锡兴、鄂城、涟源等热带轧机的配置进行了比较，并以涟源热带轧机为例，具体说明了控制系统的配置。     

冷轧窄带钢金属变形阻力的选择

分析了影响冷轧带钢金属变形阻力的变形程度,变形速度和变形温度等因素,并通过实例确定冷轧计算中变形阻力的选择。     

Trial production of lead-free zinc-coated strip

After trial production of lead-free zinc-coated strip, a refined production technology is developed. Analysis of literature and test data shows that an Al content between 0.524 and 0.438% in the melt increases the adhesion of the coating and improves its external appearance. The corrosion resistance of the coating is not impaired. It is found that, on applying polymer coating to lead-free zinc-coated strip without temper rolling, the required decorative properties are not guaranteed.     

八机架窄带热连轧计算机控制系统

介绍了具有两架立轧机的八机架窄带热连轧系统，给出了连轧系统工艺参数、产品规格及质量要求。提出了S7－400系列计算机控制系统的硬件配置、系统的供电方式、全数字直流调速系统6RA70的传动配置方案以及PROFIBUS－DP现场总线的连接方式。介绍了轧机所采用的活套高度和力矩控制器的结构及参数。最后给出了热连轧系统主干速度自适应设定方法。     

Setting method of rolling schedule for reversible four- high mill of narrow strip

The small four- high rolling mill of narrow strip has such structural features of small absolute value of working roll diameter, which causes problems like non- negligible horizontal displacement of the work rolls, larger thermal crown of the work roll, and more complicated shape control of the plate. The shape was more dependent on rolling schedule. The equipment and process characteristics of reversible four- high mill of narrow strip were fully considered. The influence model of rolling schedule of small four- high rolling mill on shape was established. The influence of specific path rolling schedule parameter on the shape was quantitatively analyzed. The targets were that the rolling pass was minimum and the relative load was the most uniform. Meanwhile, the influences of such factors as shape control, rolling stability and prevention of surface defects were also considered. A set of comprehensive optimization method for rolling schedule was put forward, which was suitable for small four high mill and taking account of shape control. Relevant technology was applied to the production practice of 450 small four high rolling mill in a company. Good results were achieved after the application in the field. The shape closure rate of the unit decreases by 45. 5%.     

我国热轧带钢生产发展趋势与对策

近年来,热轧带钢轧机发展很快,2005年前,我国国内已建成投产的热轧宽带钢轧机25套,设计能力7860万吨,截至2008年底,我国国内已建成投产的热轧宽带钢轧机共56套,设计能力1．67亿吨。按原计划,我国仍将有40余条热轧宽带钢轧机将建设。统计显示,我国热轧带钢（热轧中厚钢带、热轧薄板带和热轧窄带钢）产量由2004年的6224万吨增加到2008年的13556万吨,表观消费量由2004年的6572万吨增加到2008年的12500万吨。表面上看,我国热轧带钢产能严重过剩,实际上并非如此。     

Modeling of continuous strip production by rheocasting

A process was experimentally and mathematically modeled for continuous and direct production of metal strip from its molten state by the use of Rheocasting. The process comprises 1) continuous production of a Rheocast semisolid alloy, and 2) direct shaping of the semisolid into strip. Sn-15 pct Pb was used as the modeling alloy. Crack formation and surface quality of the strip produced depend on fraction solid and deformation force. Continuous, sound strip could be obtained with good surface quality when fraction solid was between 0.50 and 0.70 and deformation force did not exceed a given maximum. Sheet thickness depends on deformation force, fraction solid, rotor rate of Rheocaster and production line speed. At constant deformation force, sheet thickness increases as fraction solid increases, rotor rate decreases and line speed is reduced. Sheet thickness is larger in the center than in the edge, but the difference is reduced by applying edgers. Some segregation of lead toward the edges is observed, and the segregation increases as amount of deformation is increased. A mathematical model for heat flow, solidification and deformation was constructed. The model predicts the point of completion of solidification in the strip and sheet thickness as a function of deformation force and line speed. Calculations are in good agreement with experimental results. T. MATSUMIYA, formerly with Massachusetts Institute of Technology, Cambridge, MA.