铝基金属复合材料冷轧复合技术

本文介绍了铝工金属复合材料的冷轧复合技术的发展与现状，对其三个基本阶段的主要工艺特点作了较详细的叙述。     

铁基复合材料轧制技术的研究现状及发展

铁基复合材料被广泛地应用于工业生产中,其制备方法多种多样。介绍国内外轧制复合方法的工艺原理,分析各种方法的优缺点,并简述各种复合轧制方法在工业生产中的应用情况。着重介绍轧制复合法,并探讨了轧制复合法的发展趋势。     

浅谈冷轧带钢热处理表面保护

本文介绍了冷轧钢带在热处理中的表面保护，研究了热处理过程中各种炉中气氛与带钢之间的关系，着重分析了影响钢带表面质量的众多因素，指出钢带在热处理过程中的表面保护方法。     

轧制法制备金属层状复合材料的研究与应用

介绍了金属轧制复合的工艺特点、分类,分析了轧制各种复合工艺方法的优缺点以及金属轧制复合材料在各个行业中的应用情况,并对今后的研究进行了展望。     

贵金属复合材料复合轧制中轧机震动的分析

针对固相复合轧制以贱金属为基的贵金属复合材料时，轧机产生的机械震动及复合材料的产品质量问题，从引起轧制压力产生波动等因素，分析了轧机产生震动的原因及产品质量问题，提出了解决此问题的一些设想。     

冷轧生产方面的重要进展

通过从除麟一直到表现处理和精整各工序的实例，说明了德国钢铁工程师协会冷轧委员会的联合工作对冷轧领域技术发展的重要作用。简要地回顾了冷轧委员会成立以来冷轧技术所达到的高水平。     

钛的冷轧

钛加工材料中,由热轧卷经冷轧制造的产品主要用于发电站冷凝器、板式换热器、化工,建筑等方面,产量约占加工材的80%,1994年日本的产量达6600t.     

铝合金钎焊复合板冷轧工艺分析及轧制力计算

文章针对4343/3003/4343铝合金钎焊复合板,介绍了其冷轧复合的工艺方法及冷轧过程中的影响因素。并介绍了本公司与某铝业公司合作开发的Φ850×1500mm铝合金钎焊复合板冷复合机组的轧制力参数计算。     

双面不锈钢复合板冷轧及热处理工艺探讨

对不锈钢复合板的生产工艺流程及工艺要点进行了简介，并对不锈钢复合板的几种热处理工艺进行了试验，找出了适合不锈钢复合板的热处理生产工艺。     

Wear Resistant Steels and Casting Alloys containing Niobium Carbide

Niobium, like titanium and vanadium, forms superhard MC carbides that remain relatively pure in technical alloys on account of their low solubility for other metallic alloying elements. However, because they have a greater hardness than the precipitated chromium carbides commonly used in wear‐resistant alloys, they are suitable as alternative hard phases. This contribution deals with new wear‐resistant steels and casting alloys containing niobium carbide. These include a secondary hardening hardfacing alloy, a composite casting alloy for wear applications at elevated temperatures, a white cast iron as well as two variants of a corrosion‐resistant cold‐work tool steel produced by melt metallurgy and by powder metallurgy. A heat‐resistant casting alloy is also discussed. Based on equilibrium calculations the microstructures developing during production of the alloys are analysed, and the results are discussed with respect to important properties such as abrasive wear and corrosion resistance.     

X65钢级管线钢热处理工艺研究

文章介绍了X65钢级管线钢的成分设计及CCT曲线的测定,重点研究了热处理工艺,通过对试验结果的分析,得出采用调质工艺（淬火＋回火）处理,管线钢的力学性能完全满足API Spec 5L标准要求。     

Microstructure Transformations in Tempering Steels during Continuous Cooling from Hot Forging Temperatures

Apart from reducing the processing energy, hardening and tempering of near‐net shape forged components from their forging heat primarily promises shortened conventional process sequences. In this case, the continuous cooling transformation diagrams (CCT diagrams) found in the literature can only be used as a rough approximation of microstructural transformations during the heat‐treatment. The reasons for this are that firstly, the deformation influences the transformation kinetics and secondly, the deformation temperatures are comparatively high. Therefore, both deformation CCT diagrams and, for reference purposes, CCT diagrams without deformation were determined for a selection of heat‐treatable steels (34CrMo4, 42CrMo4, 52CrMo4, 51CrV4, 34NiMo6) at the heating temperature of 1200 °C and deformation levels of 0.3 and 0.6.     

包钢齿轮钢20CrMnTiH热轧圆钢试制

文章介绍了包钢齿轮钢20CrMnTiH热轧圆钢的试制工艺.结果表明,采用现有工艺装备,通过合理的工艺参数控制,包钢可以生产出合格的保淬透性齿轮钢20CrMnTiH热轧圆钢.     

Dilatometric Study of Continuous Annealing of a Cold-Rolled Austenitic Stainless Steel

The sequence of structural changes produced in two deformed microstructures of austenitic stainless steel elaborated by a multipass unidirectional cold rolling (CR) and a two-step one, to a 75% thickness reduction, is followed by dilatometric experiments. The two materials show different dilatometric behaviors. X-ray diffraction and microhardness measurements are performed to underlie the observed dilatometric behaviors. The material subjected to multipass unidirectional CR shows an unusual dilatometric behavior. The first heating stage leads to the occurrence of the recovery reaction in competition with the ε-martensite reversion. When the temperature increases between 550 and 780 °C, the reversion of deformation-induced α-martensite takes place and leads to a complicated dilatometric anomaly. Further increase in temperature leads to the occurrence of the recrystallization transformation. However, the material subjected to two-step CR shows a quite usual dilatometric behavior which is explained by the occurrence of several reactions in the following order: 1) T < 300 °C, the recovery reaction, 2) 300 < T < 680 °C, the ferro- to paramagnetic transformation of α-martensite, the reversion of ε-martensite, and the athermal reversion of α-martensite, 3) 680 < T < 760 °C, thermal reversion of DIM, and then 4) at T > 760 °C, the recrystallization.     

冷轧双相钢连续退火组织的转变

采用光学显微镜与扫描电镜观察分析了实验钢冷轧组织在连续退火过程中的再结晶与相变规律,研究了过时效回火对双相钢显微组织的影响.实验表明,在连续退火初期的加热过程中,在600～720℃大量进行再结晶.加热速度对再结晶行为有较大影响,以10℃/s加热,再结晶将持续到双相区.珠光体在低于720℃的加热过程中变化不明显,而铁素体晶界与晶内出现球状碳化物颗粒.双相区退火过程中,奥氏体首先在珠光体处形成,原铁素体晶界与晶内的碳化物颗粒也形成奥氏体岛.800℃保温后缓慢冷却至630～680℃可以得到合理比例的双相钢组织.当过时效温度大于300℃,马氏体分解,碳化物颗粒析出,将对双相钢性能产生不良影响.     

Modern Microalloyed Steels

The addition of microalloying elements (MAE) to low C-Mn-Si HSLA steels has led to many benefits to the producers,fabricators and end-users.Microstructural improvements such as microstructural refinement,higher dislocation and sub-grain boundary densities and finer M-A-C distributions have led to higher strength,improved toughness and better formability.These improvements can often be traced to the MA addition.In steels for load-bearing applications,the combination of MAE with hardenability additions (Cr,Mo,B,etc.) and lower transformation temperatures has led to much higher strength levels than what were available a few years ago.The resulting nonpolygonal,bainitic and martensitic ferrite microstructures have not only higher strengths but also adequate levels of improved ductility and toughness.Hot strip,plate and pipe applications have benefitted from these developments.Similar improvements have been found in the microalloyed forging steels,where the change from pearlite-ferrite to bainitic ferrite microstructures has led to higher strengths and improved high-cycle fatigue resistance,with little penalty in ductility and toughness.In the cold rolled gauges,both the so-called Advanced High Strength Steels (DP,TRIP and Complex Phase Steels) and the martensitic direct-quenched and press-quenched steels,along with the Interstitial-Free steels,have benefited from MAE additions,especially in the very popular zinc-coated sheet form.This paper will briefly review each of these topic areas,and the underlying physical metallurgy will be discussed.