The Abstracts of Papers in Special Issue on the Seventh Five Year Project for Rare Earths of Chinese Academy of Sciences （in Chinese）

ＴｈｅＡｂｓｔｒａｃｔｓｏｆＰａｐｅｒｓｉｎＳｐｅｃｉａｌＩｓｓｕｅｏｎｔｈｅＳｅｖｅｎｔｈＦｉｖｅＹｅａｒＰｒｏｊｅｃｔｆｏｒＲａｒｅＥａｒｔｈｓｏｆＣｈｉｎｅｓｅＡｃａｄｅｍｙｏｆＳｃｉｅｎｃｅｓ（ｉｎＣｈｉｎｅｓｅ）ＳｔｕｄｙｏｎＭａｔｅｒｉａ...     

我国特钢企业的初炼炉－精炼炉－连铸工艺技术现状

我国特钢企业的初炼炉－精炼炉－连铸工艺技术现状王建英，赵发忠（冶金工业部科技司）ＰｒｏｃｅｓｓＳｔａｔｕｓｏｆＭｅｌｔｉｎｇＦｕｒｎａｃｅ－ＳｅｃｏｎｄａｒｙＲｅｆｉｎｉｎｇＣｏｎｃａｓｔｏｆＳｐｅｃｉａｌＳｔｅｅｌＥｎｔｅｒｐｒｉｓｅｓｉｎＣｈｉｎ...     

Thermodynamics and Phase Equilibrium of Cu－Ce－O，Cu－Ce－S，Cu－Ce－O－S Liquid Solutions

ＴｈｅｒｍｏｄｙｎａｍｉｃｓａｎｄＰｈａｓｅＥｑｕｉｌｉｂｒｉｕｍｏｆＣｕ－Ｃｅ－Ｏ，Ｃｕ－Ｃｅ－Ｓ，Ｃｕ－Ｃｅ－Ｏ－ＳＬｉｑｕｉｄＳｏｌｕｔｉｏｎｓＤＵＴｉｎｇ；ＬＩＧｕｏＤｏｎｇＴｈｅｒｍｏｄｙｎａｍｉｃｓａｎｄＰｈａｓｅＥｑｕｉｌｉｂｒｉｕｍｏ...     

Current Status and Prospeet of Process Research in CISRI

ＣｕｒｒｅｎｔＳｔａｔｕｓａｎｄＰｒｏｓｐｅｃｔｏｆＰｒｏｃｅｓｓＲｅｓｅａｒｃｈｉｎＣＩＳＲＩＹＡＭＧＳｈｕＳｅｎＰｒｏｆｅｓｓｏｒ，ＣｈｉｅｆＥｄｉｔｏｒｏｆＪｏｕｒｎａｌｏｆＩｒｏｎａｎｄＳｔｅｅｌＲｅｓｅａｒｃｈ，Ｖｉｃｅ－ｐｒｅｓｉｄｅｎｔ...     

Surface Chemistry and Catalysis of Rare Earth Oxides I．A Study of the Reactivity of Surface Hydroxyls on CeO_2 and Pr_6O_（11） by FT－IR Spectroscopy

ＳｕｒｆａｃｅＣｈｅｍｉｓｔｒｙａｎｄＣａｔａｌｙｓｉｓｏｆＲａｒｅＥａｒｔｈＯｘｉｄｅｓＩ．Ａ　ＳｔｕｄｙｏｆｔｈｅＲｅａｃｔｉｖｉｔｙｏｆＳｕｒｆａｃｅＨｙｄｒｏｘｙｌｓｏｎＣｅＯ_２ａｎｄＰｒ_６Ｏ_（１１）ｂｙＦＴ－ＩＲＳｐｅｃｔｒｏｓｃｏｐｙ...     

Suggestions on Process Technology Development of Iron and Steel Making in China

ＳｕｇｇｅｓｔｉｏｎｓｏｎＰｒｏｃｅｓＴｅｃｈｎｏｌｏｇｙＤｅｖｅｌｏｐｍｅｎｔｏｆＩｒｏｎａｎｄＳｔｅｅｌＭａｋｉｎｇｉｎＣｈｉｎａＧａｎｇＹｏｎｇＰｒｏｆｅｓｏｒ，Ｖｉｃｅ－ＰｒｅｓｉｄｅｎｔｏｆＣＩＳＲＩＬｉｕＬｉｕＰｒｏｆｅｓｏｒ，Ｄｉｒｅｃ...     

Characterization and Preparation of Ce-Zr-O Solid Solution

ＣｅｒｉｕｍｏｘｉｄｅｗｉｔｈＣａＦ2 ｓｔｒｕｃｔｕｒｅｉｓｃｕｒ ｒｅｎｔｌｙｂｅｉｎｇｕｓｅｄａｓａｐｒｏｍｏｔｅｒｉｎｏｘｉｄａｔｉｏｎ .ＴｈｅｃａｐａｂｉｌｉｔｉｅｓｏｆｔｈｅｒｅｄｏｘｃｏｕｐｌｅＣｅ4 Ｃｅ3 ａｒｅｓｔｒｏｎｇｌｙｅｎｈａｎｃｅｄｉｆｏｔｈｅｒｅｌｅｍｅｎｔｉｓｉｎｔｒｏ ｄｕｃｅｄｉｎｔｏＣｅＯ2 ｌａｔｔｉｃｅｂｙｆｏｒｍｉｎｇｓｏｌｉｄｓｏｌｕ ｔｉｏｎ .ＳｅｖｅｒａｌａｐｐｒｏａｃｈｅｓｈａｖｅｂｅｅｎｕｓｅｄｔｏｐｒｅｐａｒｅＣｅＯ2 ＺｒＯ2 ｍｉｘｅｄｏｘｉｄｅ…     

FeMnAl单辊法薄带连铸工艺及其性能研究

ＦｅＭｎＡｌ单辊法薄带连铸工艺及其性能研究ＳｔｕｄｙｏｎＦｅＭｎＡｌＳｉｎｇｌｅ－ＲｏｌｌＴｈｉｎＳｔｒｉｐＣａｓｔｉｎｇＰｒｏｃｅｓｓａｎｄｔｈｅＣｈａｒａｃｔｅｒｉｓｔｉｃｓｏｆｔｈｅＳｙｓｔｅｍ摘自冶金部钢铁研究总院研究生宋璞生的博士学位论文，...     

Mechanism of Cerium Ions Scavenging Superoxide Radical

ＭｅｃｈａｎｉｓｍｏｆＣｅｒｉｕｍＩｏｎｓＳｃａｖｅｎｇｉｎｇＳｕｐｅｒｏｘｉｄｅＲａｄｉｃａｌＷａｎｇＪｉｎｓｈｅｎｇ（王金胜），ＧｕｏＣｈｕｎｒｏｎｇ（郭春绒）（ＤｅｐａｒｔｍｅｎｔｏｆＢａｓｉｃＳｃｉｅｎｃｅ，ＳｈａｎｘｉＡｇｒｉｃｕｌｔｕｒａ...     

The 4th International Conference on Rare Earths Development and Applications

ＩＣＲＥｉｓａｓｅｒｉｅｓｉｎｔｅｒｎａｔｉｏｎａｌｒａｒｅｅａｒｔｈｃｏｎｆｅｒｅｎｃｅｏｒｇａｎｉｚｅｄｂｙｔｈｅＣｈｉｎｅｓｅＳｏｃｉｅｔｙｏｆＲａｒｅＥａｒｔｈｓ(ＣＳＲＥ).Ｔｈｅ4ｔｈＩｎｔｅｒｎａｔｉｏｎａｌＣｏｎｆｅｒｅｎｃｅｏｎＲａｒｅＥａｒｔｈＤｅｖｅｌｏｐｍｅｎｔａｎｄＡｐｐｌｉｃａｔｉｏｎｓ(ＩＣＲＥ2001)ｗｉｌｌｂｅｈｅｌｄｉｎＢｅｉｊｉｎｇ,Ｃｈｉｎａ,ｏｎＪｕｎｅ1520,2001.ＴｈｅＣｈｉｎｅｓｅＳｏｃｉｅｔｙｏｆＲａｒｅＥａｒｔｈｓｈａｓｔｈｅｐｌｅａｓｕｒｅｔｏｈｏｓｔＩＣ…     

Wear Mechanisms of High Chromium Iron Roll under Hot Rolling Conditions

ＷｅａｒＭｅｃｈａｎｉｓｍｓｏｆＨｉｇｈＣｈｒｏｍｉｕｍＩｒｏｎＲｏｌｕｎｄｅｒＨｏｔＲｏｌｉｎｇＣｏｎｄｉｔｉｏｎｓＣｕｉＰｅｉｙｏｎｇ①ＡＢＳＴＲＡＣＴＢｙｕｓｉｎｇａｒｅｆｏｒｍｅｄｌａｂｏｒａｔｏｒｙｒｏｌｉｎｇｍｉｌ，ｈｏｔｗｅａｒｔｅｓｔ...     

Abrasive Wear Behavior and Mechanism of High Chromium Cast Iron

The abrasive wear behavior of high chromium cast iron(containing 12.9mass%chromium)austenitized at1 050 ℃for 2hand austempered in salt bath at 320℃for 4hwas evaluated.Abrasive wear was performed using alumina abrasive under four different loads,namely 50,100,150,and 200 N,for 36 000 cycles.The worn surfaces and wear debris were analyzed by scanning electron microscopy,laser confocal microscopy and X-ray diffraction.Microhardness profiles were also obtained in order to analyze the strain-hardening effects beneath the contact surfaces.Results indicate that the retained austenite in high chromium cast iron has experienced induced martensitic transformation after tests,for small amounts of retained austenite could be detected by X-ray diffraction.In addition,there is a close relationship between wear mechanism and test load.Under the condition of lower test load,the wear mechanism is an uninterrupted and repeated process,during which matrix is cut at first and then fine carbides flake off.As to higher test load,scratching and spalling induced by cleavage fracture of blocky carbide are the wear mechanism.     

Effect of RE Complex Inoculation on the Fatigue Wear Behaviours of High Chromium Cast Iron

ＥｆｆｅｃｔｏｆＲＥＣｏｍｐｌｅｘＩｎｏｃｕｌａｔｉｏｎｏｎｔｈｅＦａｔｉｇｕｅＷｅａｒＢｅｈａｖｉｏｕｒｓｏｆＨｉｇｈＣｈｒｏｍｉｕｍＣａｓｔＩｒｏｎＷａｎｇＪｉｕｂｉｎ（ＩｎｓｔｉｔｕｔｅｏｆＩｒｏｎ＆ＳｔｅｅｌＲｅｓｅａｒｃｈ，ＡｎｓｈａｎＩｒ...     

1 250 mm热连轧工作辊磨损控制策略

 国内大量的1 250 mm热轧机精轧机组普遍使用带有负凸度的凹形工作辊,由于轧机辊形配置及轧制工艺特点,工作辊出现严重“猫耳”型磨损,造成轧制带钢断面出现局部高点现象。为改善1 250 mm热连轧工作辊的磨损,提升带钢板形质量,提出了一种适用于1 250 mm热连轧工作辊磨损的控制策略,在保证板带稳定轧制的同时,通过轧辊辊形和工作辊窜辊策略优化来控制工作辊的磨损。本策略已应用于德龙钢铁有限公司轧钢厂,工业试验表明,该策略可减小工作辊磨损量,使轧辊磨损更加均匀,增加弯辊力调控能力,并使工作辊单位周期轧制带钢长度延长40%,对1 250 mm热连轧产线工作辊磨损控制具有研究价值和推广前景。     

Microstructure, Impact Fatigue Resistance and Impact Wear Resistance of Wear Resistant Low Cr-Si Cast Iron

Wear parts are greatly consumed in metallurgi-cal industry,fire power stations and cement works.The consumption of grinding balls and lining platesmay be the greatestunder such impactabrasive wearconditions.In China,annual consumption of ballsand plates is close to 1× 10 6 t.Therefore,develop-ing a new material for impact wear conditions is veryimportant.　　 The martensitic high chromium cast iron(WCr= 15 % ) is widely studied and used as wear resis-tance material[1— 8] ,especially for ma…     

New Method for Evaluating Thermal Wear of Rolls in Rolling Process

A new method was developed by a thermal wear machine to evaluate the thermal wear of roils in steel rolling process. The steel strip and rolls were simulated by upper and lower heating disks. The upper heating disk could he kept at a temperature of over 900 ℃ by induction heating. The pressure between the disks as high as 323.2 MPa could be achieved and the slipping rate could be 12. 7 %. The thermal wear of high speed steel （HSS） roll material, the wear rate of the HSS roll, and the SEM morphology of a worn HSS roll surface were investigated. This method was useful and could be employed to simulate friction and wear between strip and roll during the strip rolling process.     

热轧中锰马氏体耐磨钢的冲击磨损行为

 利用MLD-10型动载磨料磨损试验机,系统研究了热轧中锰马氏体耐磨钢在1、2.5和5 J冲击能量作用下的冲击磨料磨损行为,并与Hardox450钢进行了比较。借助光学显微镜(OM)、扫描电子显微镜(SEM)和布氏硬度计等设备分析了试验钢的组织、力学性能及磨损表层、亚表层,并探讨了其磨损机制。研究结果表明,试验钢的显微组织为板条马氏体,与Hardox450钢相比,其布氏硬度更高,-40 ℃下的冲击吸收能量更低,分别为503HB和15.3 J。相同工况条件下,试验钢的磨损失重明显小于Hardox450钢,且基于有效磨损时间修正后的磨损率均随着冲击能量的升高,呈现出先增大后减小的趋势。当冲击能量为2.5 J时,磨损率最大,磨损失重量最多。原因在于,冲击能量较低时,试验钢的磨损主要以犁沟为主,并伴随着少量的磨粒嵌入,磨损失重较少;当冲击能量为2.5 J时,磨损表面的切削加剧,且塑性变形造成大量磨粒嵌入基体,导致应力集中,并在反复冲击过程中产生疲劳裂纹,随后扩展至试验钢表面,形成疲劳剥落,磨损亚表层出现明显剥落坑,失重显著增加;当冲击能量为5 J时,磨损表面塑性变形增加,加工硬化显著,疲劳磨损占据主导,磨损表面硬度较高,犁沟和磨粒嵌入较少,磨损亚表层更为平整均匀,失重反而减少,磨损率下降。     

Abrasive Wear Behavior of High Chromium Cast Iron and Hadfield Steel-- A Comparison

 Abstract： Wear properties of two different crushers used for grinding raw materials of cement industry are compared using pin-on-disk wear test. The wear test was carried out with different loads on a pin. Abrasive wear behavior of two alloys was evaluated by comparing mass loss, wear resistance, microhardness and friction coefficient. The microstructure of the specimens was detected using optical microscope. The results showed that abrasive wear of high chromium cast iron is lower than that of Hadfield steel. Due to the presence of M7C3 carbides on the high chromium cast iron matrix, impact crushers exhibited higher friction coefficient.     

Effect of Microstructure on Impact Fatigue Resistance and Impact Wear Resistance of Medium Cr-Si Cast Iron

 A great amount of iron grinding balls in tube mills have been consumed. Under this impact abrasive wear working condition, the failure of wear resistant alloying white irons grinding balls is mainly caused by fatigue spalling. The impact wear resistance of martensitic high chromium cast iron (Cr of 15%) is not high sometimes, but its cost is not low. Thus, medium Cr Si wear resistant cast iron is recommended. The influence of the iron on impact fatigue resistance and impact wear resistance is pronounced. Ball on ball impact fatigue test and high stress impact wear test of the grinding balls have been carried out. The results show that the impact fatigue resistance (IFR) and impact wear resistance (IWR) of medium Cr Si cast iron are superior to those of martensitic high chromium cast iron (Cr of 15%). The main reasons are that (1) the stress in medium Cr Si cast iron is released in the as cast state; (2) the matrix is fine pearlite with better toughness and plasticity; (3) the pearlite is more stable compared with a retained austenite under repeated impact load and less phase transformation can take place; (4) high silicon content improves the morphology of eutectic carbide; (5) there is no secondary carbide which results in less crack sources. All these factors are beneficial to improvement of impact fatigue spalling resistance. The eutectic carbide M7C3 is the main constituent to resist wear.     

3Cr2W8V钢高温高载下的干摩擦滑动磨损特性

对３Ｃｒ２Ｗ８Ｖ钢高温高载下的干摩擦滑动磨擦滑动磨损性及磨损面形貌、磨损面表层和次表层的组织和硬度进行了试验和分析。结果表明：高载下３Ｃｒ２Ｗ８Ｖ钢的力学性能是决定材料磨损特性的低载下磨损面上形成氧化物磨屑的覆盖,而在国高载和高温下都未形成氧化物磨屑的覆盖;高温高载下,主要因３Ｃｒ２Ｗ８Ｖ钢本身承能力下降,氧化物磨屑未能覆盖于磨损面上,故对磨损面起不到保护作用。