Synthesis of Solid Complex of Tl[(RO)_2PSO] and Its Property

ＳｙｎｔｈｅｓｉｓｏｆＳｏｌｉｄＣｏｍｐｌｅｘｏｆＴｌ［（ＲＯ）＿２ＰＳＯ］ａｎｄＩｔｓＰｒｏｐｅｒｔｙＬｉｕＸｉｎｇｚｈｉ，ＳｏｎｇＹｕｌｉｎ（刘兴芝）（宋玉林）（ＬｉａｏｎｉｎｇＵｎｉｖｅｒｓｉｔｙ，Ｓｈｅｎｙａｎｇ１１００３６，Ｃｈｉｎａ）Ｒｅ...     

MOCVD Growth of Quaternary Ga_xIn_(1-x)As_(1-y)Sb_yAlloys:Solid Composition

ＭＯＣＶＤＧｒｏｗｔｈｏｆＱｕａｔｅｒｎａｒｙＧａｘＩｎ１－ｘＡｓ１－ｙＳｂｙＡｌｏｙｓ：ＳｏｌｉｄＣｏｍｐｏｓｉｔｉｏｎＺｈａｎｇＢａｏｌｉｎ，ＪｉｎＹｉｘｉｎ，ＺｈｏｕＴｉａｎｍｉｎｇ，ＮｉｎｇＹｏｎｇｑｉａｎｇ（张宝林）（金亿鑫）（周天明）（宁永强）ＪｉａｎｇＨｏｎｇａｎｄＬｉＳｈｕｗｅｉ（蒋红）（李树纬）ＣｈａｎｇｃｈｕｎＩｎｓｔｉｔｕｔｅｏｆＰｈｙｓｉｃｓ，ＣｈｉｎｅｓｅＡｃａｄｅｍｙｏｆＳｃｉｅｎｃｅｓ，Ｃｈａｎｇｃｈｕｎ，１３００２１，ＣｈｉｎａＲｅｃｅｉｖｅｄ２５Ｊｕｌｙ１９９…     

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...     

Improvement of SiC_p Reinforced Cast AluminiumComposites by the ROC Method

ＩｍｐｒｏｖｅｍｅｎｔｏｆＳｉＣ＿ｐＲｅｉｎｆｏｒｃｅｄＣａｓｔＡｌｕｍｉｎｉｕｍＣｏｍｐｏｓｉｔｅｓｂｙｔｈｅＲＯＣＭｅｔｈｏｄＺｈｅｎｇＱｉｆｅｉ，ＸｉｅＳｈｕｉｓｈｅｎｇ，ＹｕａｎＧｕａｎｓｅｎ，ＳｈｉＬｉｋａｉ（郑弃非）（谢水生）（袁冠森）（...     

New Advancement of Tantalum Industry in Ningxia Nonferrous Metals Smelter

ＮｅｗＡｄｖａｎｃｅｍｅｎｔｏｆＴａｎｔａｌｕｍＩｎｄｕｓｔｒｙｉｎＮｉｎｇｘｉａＮｏｎｆｅｒｏｕｓＭｅｔａｌｓＳｍｅｌｔｅｒＬｕＺｈｅｎｄａ，ＨｅＪｉｌｉｎ（卢振达）（何季林）ＮｉｎｇｘｉａＮｏｎｆｅｒｒｏｕｓＭｅｔａｌｓＳｍｅｌｔｅｒ，Ｓｈｉｚｕ...     

Study on Magnetic Domains in Sm-Co Based Alloy

ＳｔｕｄｙｏｎＭａｇｎｅｔｉｃＤｏｍａｉｎｓｉｎＳｍ－ＣｏＢａｓｅｄＡｌｌｏｙＬｉｕＡｎｓｈｅｎｇ，ＳｈａｏＢｅｉｌｉｎｇ，ＷａｎｇＸｉａｏｈｕａａｎｄＷａｎｇＪｉｎｇ（刘安生）（邵贝羚）（王晓华）（王敬）（ＧｅｎｅｒａｌＲｅｓｅａｒｃｈＩｎｓｔｉｔ...     

Research on Copper Removal from Composite Wires of Copper-Stainless Steel Fibers

ＲｅｓｅａｒｃｈｏｎＣｏｐｐｅｒＲｅｍｏｖａｌｆｒｏｍＣｏｍｐｏｓｉｔｅＷｉｒｅｓｏｆＣｏｐｐｅｒＳｔａｉｎｌｅｓＳｔｅｌＦｉｂｅｒｓＨｅＷａｎｎｉａｎ，ＦｅｎｇＪｉｎｇｓｕａｎｄＨｅＳｉｊｉａ（何万年）（冯景苏）（何思郏）ＧｅｎｅｒａｌＲｅｓｅａ...     

Compositing Soft Coated Ti-Fiber Reinforced Ti-Al Matrix Composites

ＣｏｍｐｏｓｉｔｉｎｇＳｏｆｔＣｏａｔｅｄＴｉＦｉｂｅｒＲｅｉｎｆｏｒｃｅｄＴｉＡｌＭａｔｒｉｘＣｏｍｐｏｓｉｔｅｓＨｅＧｕｉｙｕ，ＣｈｕＳｈｕａｎｇｊｉｅ，ＨｕＳｈｉｐｉｎｇ（何贵玉）（储双杰）（胡世平）ＮｏｒｔｈｗｅｓｔｅｒｎＰｏｌｙｔｅｃ...     

Synthesis and Properties of Molybdotungstogallic Heteropoly Complexes

ＳｙｎｔｈｅｓｉｓａｎｄＰｒｏｐｅｒｔｉｅｓｏｆＭｏｌｙｂｄｏｔｕｎｇｓｔｏｇａｌｌｉｃＨｅｔｅｒｏｐｏｌｙＣｏｍｐｌｅｘｅｓＷｕＱｉｎｇｙｉｎａｎｄＳｏｎｇＹｕｌｉｎ（吴庆银）（宋玉林）（ＤｅｐａｒｔｍｅｎｔｏｆＣｈｅｍｉｓｔｒｙ，Ｌｉａｏｎｉｎｇ...     

YBCO Films Grown on Sapphire with YSZ Buffer Layer

ＹＢＣＯＦｉｌｍｓＧｒｏｗｎｏｎＳａｐｐｈｉｒｅｗｉｔｈＹＳＺＢｕｆｆｅｒＬａｙｅｒＳｈｉＤｏｎｇｑｉ，ＹａｎｇＢｉｎｇｃｈｕａｎ，ＷａｎｇＸｉａｏｐｉｎｇ，ＰｅｎｇＺｈｅｎｇｓｈｕｎａｎｄＣｈａｎｇＳｈｉａｎ（石东奇）（杨秉川）（王小平）（彭正顺）...     

回火过程数值模拟的研究

在淬火过程数值模拟基础上 ,进一步提出了回火过程的数值计算模型 ,其中着重考虑了应力松弛现象。将模拟计算结果与实测结果进行了比较 ,结果表明 ,本文所采用的数学模型是可靠的 ,用回火过程的数值模拟软件对回火过程进行初步的近似计算是完全可行的。     

A508-3钢回火过程的组织演变及动力学分析

回火对核电设备用A508-3钢的力学性能影响很大。采用扫描电镜和硬度测试研究了A508．3钢回火过程中组织的演变和性能的变化,并对经600～660℃回火的钢进行了基于硬度测量的动力学分析。回火过程中硬度的变化可以用残留奥氏体和奥氏体一马氏体的分解,贝氏体铁素体内碳化物的析出、粗化以及贝氏体铁素体的回复再结晶来解释。动力学分析表明,A508．3钢在600～660℃回火时的相变激活能约为101．4kJ／mol,与碳原子在铁素体中的扩散激活能相近。A508．3钢只有在较高温度回火时,才出现贝氏体铁素体内碳化物的大量析出和粗化,这说明该钢种具有较好的回火稳定性。     

Effects of Tempering Temperature on Microstructure and Mechanical Properties of Drill Pipe Steel 26CrMoEI北大核心CSCD

The effects of tempering temperature on microstructure and mechanical properties of steel 26CrMo were studied based on mechanical property tests and microstructure observation. The results show that a phase matrix gradually occurs recovery and recrystallization with increasing temperature during 540 similar to 690 degrees C temper process, martensite morphology fades away gradually, flake or rocklike carbides separate out along the martensite boundaries, and then change into granulated dispersed distribution, at 690 degrees C tempering carbides happen aggregation and growth on grain boundaries. With tempering temperature increasing, the strength of 26CrMo steel is gradually reducing, plasticity and toughness are gradually increasing. The tensile property and impact energy can meet all different grade drill pipe requirements in API 5DP standard with different tempering conditions. The total impact energy, crack initiation energy and crack propagation energy of 26CrMo steel are gradually increasing with the tempering temperature rising, the crack propagation energy is three times of crack initiation energy which shows great anti-crack propagation capability, but their ratio has no obvious change. The change of impact property is closely related to the strength and plasticity change, impact toughness stand or fall depends on high or low plasticity.     

Residual stress analysis with improved numerical methods for tempered plate glasses based on structural relaxation model

Glass has useful optical properties but shows unfavorable mechanical performance such as poor impact resistance. As a way to improve such inferior mechanical performance, glass undergoes tempering processes which introduce through-thickness residual stress. Here, the residual stress is numerically analyzed for a soda-lime silicate glass plate under the one-dimensional through-thickness symmetric boundary conditions. As for the constitutive law, the structural relaxation model was used to account for the non-equilibrium thermodynamic state of micro-structures in calculating volume change during cooling and also the visco-elastic nature of mechanical properties. Results obtained using improved numerical methods were compared with experiments as well as results available in previous literatures.     

临界区回火温度对Fe-4Mn-1.2Cr-0.3Cu-0.6Ni中锰钢微观组织和力学性能的影响

研究了临界区回火温度对Fe-4Mn-1.2Cr-0.3Cu-0.6Ni中锰钢组织与力学性能的影响。通过热轧后直接淬火+临界区回火的工艺制备试验钢。采用光学显微镜(OM)、电子探针显微分析仪(EPMA)的扫描功能、透射电镜(TEM)、拉伸试验及冲击试验等对轧后淬火态和回火态试验钢的显微组织及力学性能进行了表征。结果表明,试验钢热轧后淬火可获得较高位错密度的板条马氏体,经过临界区回火后获得在回火马氏体基体上分布残留奥氏体的复合组织。随着临界区回火温度的升高,试验钢的抗拉强度呈升高趋势,而屈服强度先下降后增加,伸长率的变化趋势与试验钢中的残留奥氏体含量相关,冲击性能随临界区回火温度的升高呈先升高后降低的趋势。630 ℃回火后试验钢的拉伸性能最佳,650 ℃回火后试验钢的冲击性能最佳,确定最佳临界区回火温度区间为630~650 ℃。     

回火温度对X80钢级热煨弯管组织性能的影响

采用热模拟试验方法、力学性能测试技术及显微分析技术研究了回火温度对X80钢级热煨弯管组织性能的影响规律。结果表明,当回火温度区间为550～650℃时,贝氏体铁素体及粒状贝氏体中板条宽化现象的增强及沉淀强化效应的降低不利于其强度的提高。位错亚结构的变化,Nb、V、Ti的碳、氮化物对位错及亚晶钉扎作用的降低及板条间M-A组元的逐渐分解等组织因素有利于其韧性的提高。当回火温度升高到700℃时,组织中板条宽化现象进一步增强,部分组织发生再结晶而出现多边形铁素体,以及位错密度的降低导致了材料强度和韧性的快速下降。综合考虑X80热煨弯管的强韧性,适宜的回火温度为650℃×1 h。     

Cr12MoV钢陶瓷模具异常开裂分析

Ｃｒ１２ＭｏＶ钢制陶瓷模具正常失效方式为磨损。一批上模早期开裂失效的主要原因是回火不足,导致残存的淬火组织应力与热应力在后续磨削和线切割加工中产生机械应力叠加后超过材料强度所致。改锻和球化退火不充分,使Ｃｒ１２ＭｏＶ钢共晶碳化物呈带状、网状分布且颗粒粗大而带尖角并促进了裂纹的发展。模具结构中尖角及其间的棱边因应力集中而成为众多宏观裂纹的起点和纵深发展地带。经补充回火的模块在后续磨削和线切割成形中未     

换热器浮头盖SA453螺柱断裂失效分析

某批换热器在浮头盖装配时高强螺柱前后出现两次断裂现象,通过现场调查、化学成分、力学性能、宏观断口、金相观察、结构应力计算及螺柱制造工艺调查等方法,对其断裂原因进行综合分析。结果表明：螺柱和螺母咬合在一起的应力集中是致使最大剪应力超过材料的抗剪强度、导致螺柱扭断的主要原因,最大等效应力明显大于抗拉强度,致使断裂处材料因其高强度而表现出脆性断裂;热处理工艺执行不到位是造成螺柱断裂的次要原因,是螺柱批量生产中堆积装炉热处理的不规范操作所致;螺柱经真空回火热处理后提高了力学性能和硬度,规范紧固件装配操作过程后,满足了使用要求。     

锻造Cr13Ni4钢回火工艺与逆变奥氏体及性能的关系研究

主要研究锻造Cr13Ni4马氏体不锈钢回火工艺与逆变奥氏体含量及力学性能的关系.实验表明:回火温度超过590C时,在冷却过程中逆变奥氏体会部分发生马氏体转变;合适的二次回火可大大提高逆变奥氏体的含量;在相同的一次回火温度下,二次回火(低于失稳温度590℃)温度越高,逆变奥氏体含量越高;逆变奥氏体的含量在10%左右时,材...     

B57J-V中压汽缸冲击功不合格原因研究

材质为B57 J-V的中压汽缸在进行力学性能测试时,AkV指标不合格。通过金相、扫描电镜、热处理试验等比照分析,确定中压汽缸AkV不合格是回火过程中产生了回火脆性。提出了相应的工艺改进措施,即回火后空冷并在400℃附近增加消应力退火。