神钢─美铝铝业公司CVC－6辊冷轧机投产

神钢─美铝铝业公司ＣＶＣ－６辊冷轧机投产设在日本真同市（Ｍｃｏｋａ）的神钢一美招铝业公司（ＫＳＩ．一ＡｌｃｏａＡＩ。；ｍ，；。，ｉ；Ｃｏ。ｎｐａｎｙ。Ｌｔｄ．）轧制厂的２台德国西马克公司（ＳＭＳＳｃｈｌ。，。ａ。。。。一Ｓｔ。，ｌａｇＡＧ）提供的ＣＶ...     

High Temperature Thermodynamics of RE(La,Ce,Pr,Y,Tb)-S-F Systems

ＨｉｇｈＴｅｍｐｅｒａｔｕｒｅＴｈｅｒｍｏｄｙｎａｍｉｃｓｏｆＲＥ（Ｌａ，Ｃｅ，Ｐｒ，Ｙ，Ｔｂ）－Ｓ－ＦＳｙｓｔｅｍｓＨｏｎｇＹａｎｒｕｏ；Ｒ．ＶａｓａｎｔＫｕｍａｒ＊ａｎｄＬｉＬｉａｎｓｈｅｎｇ（洪彦若）（李联生）（ＵｎｉｖｅｒｓｉｔｙｏｆＳｃｉｅ...     

高温超导带材厚度和织构对临界电流密度Jc的影响

采用拉拔－轧制工艺制造出了ＢｉＰｂＳｒＣａＣｕＯ／Ａｇ复合高温超导带材。研究了带材厚度及织构对临界电流密度Ｊｃ的影响。厚度越薄，织绝程度越强，Ｊｃ值越高。     

MICROSTRUCTURE AND J_c OF Y－Ba－Cu－O SUPERCONDUCTOR AFTER P_（o_2）－ALTERNATIVE HEAT TREATMENT

ＭＩＣＲＯＳＴＲＵＣＴＵＲＥＡＮＤＪ_ｃＯＦＹ－Ｂａ－Ｃｕ－ＯＳＵＰＥＲＣＯＮＤＵＣＴＯＲＡＦＴＥＲＰ_（ｏ_２）－ＡＬＴＥＲＮＡＴＩＶＥＨＥＡＴＴＲＥＡＴＭＥＮＴ￥Ｃｈｅｎ，Ｋａｎｇｈｕａ；Ｈｕａｎｇ，Ｐｅｉｙｕｎ（ＰｏｗｄｅｒＭｅｔａｌｌｕｒｇｙＲ?..     

BEHAVIOUR OF ELEMENTAL SULPHUR IN BIOOXIDATION OF GOLD-BEARING SULPHIDE ORES

ＢＥＨＡＶＩＯＵＲＯＦＥＬＥＭＥＮＴＡＬＳＵＬＰＨＵＲＩＮＢＩＯＯＸＩＤＡＴＩＯＮＯＦＧＯＬＤ－ＢＥＡＲＩＮＧＳＵＬＰＨＩＤＥＯＲＥＳ￥ＸｉａｎｇＬａｎ；ＫｅＪｉａｊｕｎ（ＩｎｓｔｉｔｕｔｅｏｆＣｈｅｍｉｃａｌＭｅｔａｌｌｕｒｇ，ＣｈｉｎｅｓｅＡｃａ...     

RARE EARTH RECOVERY BY SUPPORTED LIQUID MEMBRANE

ＲＡＲＥＥＡＲＴＨＲＥＣＯＶＥＲＹＢＹＳＵＰＰＯＲＴＥＤＬＩＱＵＩＤＭＥＭＢＲＡＮＥＹａｎｇ，Ｘｉａｎｗａｎｇ；Ｌｉｕ，Ｌａｎｍｉｎｇ；Ｇｏｕ，Ｂａｎｇｈｕｉ（ＫｎａｉｎｉｎｇＩｎｓｔｉｔｕｔｅｏｆＴｅｃｈｎｏｌｏｇｙ，Ｋｕｎｍｍｇ６５０２２１，Ｃｈ...     

电子封装用Cu/Mo/Cu复合材料的工艺研究

研究了浸涂助复剂（铝基合金）和室温轧制工艺对Cu／Mo／Cu复合界面结合强度的影响，简述了Cu／Mo／Cu复合板室温轧制成形工艺过程，详细分析了表面和界面清理、初道次轧制临界变形率及热处理工艺等因素对复合板结合强度的影响。实验结果得出，钼板浸涂Al—Mn—Zn—Sn合金助复剂后的热处理温度为800～850℃；初道次轧制变形率为45％最佳；复合轧制后合适的退火工艺为450℃，保温60min。     

EFFECT OF MICROSTRUCTURES ON CYCLIC-OXIDATION BEHAVIOUR OF TiAl ALLOY

ＥＦＦＥＣＴＯＦＭＩＣＲＯＳＴＲＵＣＴＵＲＥＳＯＮＣＹＣＬＩＣ－ＯＸＩＤＡＴＩＯＮＢＥＨＡＶＩＯＵＲＯＦＴｉＡｌＡＬＬＯＹＺｈｏｕＫｅｃｈａｏ；ＨｕａｎｇＢａｉｙｕｎ；ＱｕＸｕａｎｈｕｉ；ＨｅＹｕｅｈｕｉ；ＫｏｎｇＧａｏｎｉｎｇ（ＰｏｗｄｅｒＭｅｔａ...     

NUMERICAL SIMULATION OF ALTERNATIVE HORIZONTAL LEVITATION ELECTROMAGNETIC CONTINUOUS CASTING（Ⅱ）

ＮＵＭＥＲＩＣＡＬＳＩＭＵＬＡＴＩＯＮＯＦＡＬＴＥＲＮＡＴＩＶＥＨＯＲＩＺＯＮＴＡＬＬＥＶＩＴＡＴＩＯＮＥＬＥＣＴＲＯＭＡＧＮＥＴＩＣＣＯＮＴＩＮＵＯＵＳＣＡＳＴＩＮＧ（Ⅱ）￥ＺｈｕＳｈｏｕｊｕｎ；ＲｅｎＺｈｏｎｇｍｉｎｇ；ＤｅｎｇＫａｎｇ；Ｊｉａｎ...     

俄罗斯铝业公司开始组建

据英国ＣＲＵ国际公司（ＣＲＵ Ｉｎｔｅｒｎａｔｉｏｎａｌ　 Ｌｔｄ．）报道，西布涅夫特（Ｓｉｂｎｅｆｔ）持股公司与西比尔斯基铝业公司（Ｓｉｂｉｒｓｄｙ）集团最近正式宣布，将合并它们的资产，组成一个新的股份公司─—俄罗斯铝业公司（Ｒｕｓｓｉａｎ　Ａｌｕｍｉｎｉ－ｕｍ）。该公司拥有俄罗斯的三个大铝厂，布拉茨克铝厂（Ｂｒａｔｓｋ）、克拉斯诺雅尔斯克铝厂（Ｋｌａｓｌｌｒｗａｒｓ ｋ）与萨彦斯克铝厂（Ｓａｙａｎｓｋ），它们的总生产能力达２．０８５ Ｍｔ／ａ ；还控制两个氧化铝厂与一个水电站．俄罗斯铝业公司开始…     

等温温度对轧制SIMA法制备7075合金半固态显微组织的影响

分别采用以同步轧制和异步轧制为预变形方式的应变熔化激活法(SIMA)制备7075铝合金半固态坯料,研究了辊径比和等温保温温度对预变形板材热处理过程中组织演变的影响。结果表明:随等温温度的升高,初生固相晶粒内生成大量液相,固相晶间冷却后出现大量共晶相。在相同的热处理条件下,异步轧制预变形工艺能够比同步轧制预变形工艺获得更多液相,且半固态进程更迅速;获得半固态坯料的优化工艺条件为异步轧制作预变形、等温温度选择610 ℃。     

连铸方坯直轧输送过程中温度场的数值模拟

连铸直接轧制工艺顺利进行的核心因素是连铸坯的温度,为解决连铸直轧过程铸坯温度和速度的衔接问题,采用ANSYS软件模拟了从结晶器弯月面到轧机前整个过程中铸坯的温度变化和坯壳厚度,并在此基础上分析了不同拉速、浇铸温度及比水量等工艺参数对铸坯温度、坯壳厚度、凝固终点位置的影响规律。模拟结果表明,拉速为2.8 m/min、浇铸温度为1 550 ℃、比水量为1.4 L/kg的工艺条件下,且铸坯到达轧机前平均温度保持在900 ℃以上,可以满足直接轧制工艺要求。这有利于连铸与轧制两个工序的顺利衔接,为钢厂连铸车间的改造提供一定的理论指导。     

Modelling of plastic flow, heat transfer and microstructural evolution during rolling of eutectoid steel rods

A study was undertaken in an attempt to quantitatively describe the rolling process of eutectoid steel rods. Finite element method was employed to model plastic flow and heat transfer in the deformed material, and heat transfer during cooling to ambient temperature. The numerical calculation gave an assessment of the strain, strain rate and temperature distributions in the work piece. This allowed the prediction of the austenite microstructure evolution during the process. Finally, the relationships describing the microstructure-mechanical properties were used to quantitatively characterize the influence of processing parameters on strength of rods after rolling.     

UMo/Zr弥散燃料板尺寸控制精度的研究

通过锆合金片的冷轧实验以及UMo/Zr燃料板的冷轧工艺实验,分析了锆合金的变形特性和不同相体积的UMo/Zr燃料板的冷轧延伸量与相体积、轧制压力的关系。结果表明,锆合金在冷轧加工时会发生明显的硬化现象,最优冷轧道次为4~5道次。冷轧变形量越大,锆合金的加工硬化现象越明显。此外,明确了UMo/Zr燃料板冷轧延伸量与相体积、轧制压力的关系,即在相同轧制道次、相同相体积的条件下,轧制压力越大,燃料板芯体的延伸量也越大;相体积越大,燃料板达到相同延伸量时所需的轧制压力也越大。并据此建立UMo/Zr燃料板单道次的轧制压力和延伸量的对照表。采用此对照表进行冷轧的UMo/Zr燃料板,其尺寸控制精度大幅提高(约40%),平均轧制时间节省约2. 6 min。     

Investigation on Temperature Change of Cold Magnesium Alloy Strips Rolling Process with Heated Roll

Magnesium alloy strips are widely used in aerospace, automotive industry, etc., which are difficult to produce through cold forming process due to their poor deformation ability. In this article, we studied whether the rolling process with heated roll could be used to roll cold magnesium alloy strips. Thermal-mechanical finite element simulation of the rolling process, using heated roll and cold strips to produce the magnesium alloy strips, was carried out. Influences of roll temperature, rolling velocity, rolling reduction ratio, and initial strip thickness on the thermal field and the mean temperature of magnesium alloy strips were analyzed. Both the heated area in strips in rolling deformation zone and the mean temperature of strips at exit of rolling deformation zone increase with increasing the roll temperature and/or rolling reduction ratio, and/or with decreasing the rolling velocity and/or initial strip thickness. Finally, a formula was developed to predict the mean temperature of strips under different rolling conditions, which also could be used to calculate the critical value of parameters in rolling process.     

G20CrNi2MoA轴承钢控轧控冷工艺热模拟研究

控轧控冷是先进轴承钢的重要生产工艺。利用Gleeble3500热模拟试验机对G20CrNi2MoA轴承钢进行了控制轧制和控制冷却的热模拟试验，分析了变形温度、变形程度和冷却速率对G20CrNi2MoA优质滚动轴承钢微观组织和硬度的影响。基于试验结果，确定了开轧温度900 ℃、变形量30%的条件进行轧制，终轧后以5 ℃/s的冷却速率冷却到650 ℃，再以2 ℃/s的冷却速率冷却至室温的控轧控冷工艺。该工艺可获得比原始组织更细小均匀的贝氏体组织，试验钢综合力学性能有所提高，抗拉强度提升180 MPa、屈服强度变化较小、硬度提升50HV，断后伸长率提升2%。     

Simultaneously Improving Mechanical Properties and Stress Corrosion Cracking Resistance of High-Strength Low-Alloy Steel via Finish Rolling within Non-recrystallization Temperature

The effect of hot rolling process on microstructure evolution,mechanical properties and stress corrosion cracking (SCC) resistance of high-strength low-alloy (HSLA) steels was investigated by varying the finish rolling temperature (FRT) and total rolling reduction.The results revealed granular bainite with large equiaxed grains was obtained by a total rolling reduction of 60％ with the FRT of 950 ℃ (within recrystallization temperature Tr).The larger grain size and much less grain boundaries should account for the relatively lower strength and SCC resistance.A larger rolling reduction of 80％ under the same FRT resulted in the formation of massive martensite-austenite (M/A) constituents and resultant low ductility and SCC resistance.In contrast,a good combination of strength,ductility and SCC resistance was obtained via 80％ rolling reduction with the FRT of 860 ℃ (within non-recrystallization temperature Tnr),probably because of the fine grain size and M/A constituents,as well as a high density of grain boundary network.     

G20CrNi2MoA轴承钢控轧控冷工艺热模拟研究

控轧控冷是先进轴承钢的重要生产工艺。利用Gleeble3500热模拟试验机对G20CrNi2MoA轴承钢进行了控制轧制和控制冷却的热模拟试验，分析了变形温度、变形程度和冷却速率对G20CrNi2MoA优质滚动轴承钢微观组织和硬度的影响。基于试验结果，确定了开轧温度900 ℃、变形量30%的条件进行轧制，终轧后以5 ℃/s的冷却速率冷却到650 ℃，再以2 ℃/s的冷却速率冷却至室温的控轧控冷工艺。该工艺可获得比原始组织更细小均匀的贝氏体组织，试验钢综合力学性能有所提高，抗拉强度提升180 MPa、屈服强度变化较小、硬度提升50HV，断后伸长率提升2%。     

轧制工艺对深冲钼带组织和性能的影响

通过轧制温度、轧制方式实验,以及织构和力学性能分析,研究了轧制工艺对液晶显示背光源用的深冲钼带的组织和性能的影响。结果表明：采用低温开坯,然后低温两次交叉轧制,再进行一次交叉轧制的工艺,使钼带在1000℃退火后具有很强的{001}〈011〉板织构和弱的〈111〉丝织构;钼带纵、横向组织几乎完全一致,都为细小均匀、相互搭接的纤维状组织;钼带经过消除应力退火后,纵、横向不仅都具有较高并相近的延伸率,而且强度也相近,杯突值较高。由于强度和硬度适中,各项性能形成了很好的匹配,使钼带各向异性大大减弱,深冲性能良好。     

Effect of rolling temperature on microstructure and texture of twin roll cast ZK60 magnesium alloy

Twin roll cast ZK60 alloy strip/sheet with final thickness of 0.5 mm was prepared,and effect of rolling temperature on microstructure and texture development was investigated using OM and XRD technique,microstructure and texture were measured on specimens subjected to rolling experiment at different rolling temperature,and macrotexture was also evaluated by X-ray diffraction method.In addition,the(1 010)and(0002) pole figures were measured,and the tensile test was performed to reveal the influence of rolling temperature on mechanical properties.The results show that the microstructure of ZK60 alloy sheet consisted of fibrous structure with elongated grains,and shear bands along the rolling direction after warm rolling.Dynamic recrystallization could be found during the warm rolling process at rolling temperature 350 °C and above.And many fine recrystallized grain could be observed in the shear bands area.It is a little difficult to see the recrystallized grain in the sheet warm rolled at 300 °C because of higher density of shear bands.The warm rolled ZK60 alloy sheet exhibited strong(0002) pole texture,the intensity of(0002) pole figure decreases with the increasing of rolling temperature and the basal pole tilted slightly to the transverse direction after warm rolling.