园锥破碎机轧臼壁的研制应用

本课题研制的轧臼壁是选矿厂碎矿车间碎矿系统园锥破碎机重要的备件之一、在实际工况条件下，该工件承受着极强烈的、高周次的、反复交变应力的作用(冲击、磨擦、挤压，剪切等)，其质量的好坏，将直接到选矿厂能否进行正常的生产经营活动。为保证生产出高质量的、使用寿命长的砸臼壁，几年来，我厂科研人员曾进行了广泛的调研、反复的科技攻关及艰苦的生产试制     

废钢破碎机发展情况综述

介绍了废钢破碎机的结构特点、工作原理和主要技术指标,论述了国内外废钢破碎机的发展情况。指出高效可靠的废钢破碎机具有很好的市场前景。     

铸造用20t铸型振动破碎机的研发和设计

主要对铸造生产应用自硬砂工艺的旧砂再生中大型振动破碎机的研发设计做了介绍。重点对破碎机设计参数的选择、结构优化设计上进行了深入的研究和试验论证,以提高振动破碎机在铸造生产上的实用性和可靠性。     

海绵钛破碎设备的选择与应用

通过破碎设备的工作原理及其破碎海绵钛的可行性分析以及剪切式破碎机取代齿辊破碎机的生产实践，论述了剪切式破碎机在海绵钛生产中的可靠性。     

对辊破碎机耐磨堆焊焊条的研制

研制了一种用于对辊破碎机耐磨堆焊焊条,通过反复调整焊条药皮成分,找到了适合对辊破碎机机齿堆焊的合金系。通过堆焊层的金相显微分析及Ｘ射线物相分析表明：新研制的对辊破碎机耐磨堆焊焊条组织为马氏体＋碳化物＋残余奥氏体,堆焊层的硬度在ＨＲＣ６４～６５之间,耐磨试验和工业试验证明,对辊破碎机堆焊合金的耐磨性能优良,是３５ＣｒＭｏＴｉ钢的８．６倍,比未堆焊的破碎机使用寿命提高７．８倍     

破碎机前端的铸造生产

破碎机前端是破碎机中的关键部件,它在工作中承受很大的冲击载荷,铸件质量要求严格。我公司生产的破碎机前端是出口巴西的破碎机铸件,最大轮廓     

圆锥破碎机研究现状及发展趋势

综合圆锥破碎机的发展历程,本文介绍了圆锥破碎机的分类及工作原理,结合国内外对圆锥破碎机的研究情况,从圆锥破碎机的能耗研究、衬板磨损预测研究、产品粒度研究及腔型优化四个方面论述了圆锥破碎机的发展现状,提出了现有研究成果中存在的噪声大、振动突出、破碎效率低、衬板使用寿命短、产品粒度不均匀、关键零部件的结构设计不合理等问题,预测了未来圆锥破碎机大型化、高效化、智能化、绿色化的发展趋势,为今后科研人员深入研究提供参考。     

节能环保型破碎机液压驱动系统设计

破碎机全液压系统用于驱动回转式剪切破碎机。应用电液伺服比例调速技术和液压节能技术,研制用于回转式剪切破碎机的液压驱动系统,满足回转式剪切破碎机的工作要求。     

对辊破碎机耐磨准焊焊条的研制

研制了一种用于对辊破碎机耐磨堆焊焊条,通过反复调整焊条药皮成分,找到了适合对辊破碎机机齿堆焊的合金来,通过堆焊层的金相显微分析及Ｘ射线物相分析表明：新研制的对辊破碎机耐磨堆焊焊条组织为马氏体＋碳化物＋残余奥氏体,堆焊层的硬度在ＨＲＣ６４－６５之间,耐磨试验和工业试验证明,对辊破碎机堆焊合金的耐磨性能优良,是３５ＣｒＭｏＴｉ钢的８．６倍,比未堆焊的破碎机使用寿命提高７．８倍。     

颚式破碎机偏心轴楔横轧成形可行性研究

提出了颚式破碎机偏心轴制坯新工艺,利用DEFORM-3D有限元软件对楔横轧成形颚式破碎机偏心轴的过程进行了数值模拟.对不同直径轧件轧制过程中的心部应力、应变及损伤值进行了对比.结果表明,颚式破碎机偏心轴采用楔横轧成形是可行的.这能为颚式破碎机偏心轴高效精确成形提供理论依据.     

Effects of Post-weld Heat Treatment on Microstructure,Mechanical Properties and the Role of Weld Reinforcement in 2219 Aluminum Alloy TIG-Welded Joints

In as-welded state, each region of 2219 aluminum alloy TIG-welded joint shows diff erent microstructure and microhardness due to the diff erent welding heat cycles and the resulting evolution of second phases. After the post-weld heat treatment, both the amount and the size of the eutectic structure or θ phases decreased. Correspondingly, both the Cu content in α-Al matrix and the microhardness increased to a similar level in each region of the joint, and the tensile strength of the entire joint was greatly improved. Post-weld heat treatment played the role of solid solution strengthening and aging strengthening. After the post-weld heat treatment, the weld performance became similar to other regions, but weld reinforcements lost their reinforcing eff ect on the weld and their existence was more of an adverse eff ect. The joint without weld reinforcements after the post-weld heat treatment had the optimal tensile properties, and the specimens randomly crack in the weld zone.     

新型的治疗阿尔茨海默氏症药物(1-二甲基磷酰基-2,2,2-三氯)-乙基-1-醇烟酸醋对体外神经细胞的作用

目的: 观察本实验室合成的一种治疗阿尔茨海默氏症(AD)的药物(1-二甲基磷酰基-2, 2, 2 -三氯)-乙基^-1-醇烟酸醋(NMF),对体外培养的皮层神经细胞活性的影响以及对海人藻酸(KA)所致的神经损伤的保护作用。方法: 采用体外培养皮层神经元的方法,解剖分离 15 d胚胎小鼠皮层神经细胞, 接种于 96孔板,48 h 后加药并培养 72 h,以 MIT 法 观察 NMF 对小鼠皮层神经细胞活性的影响;同时将接种于 24 孔板的细胞预先给予 NMF,d 3 时加或不加KA处理后,以台盼蓝染色鉴别并计数死、活细胞,可得出细胞的存活率。结果: NMF 明显促进胎鼠皮层神经元活性,其中 NMF1、0. 1、10nmol·L^-1促进神经元活性增殖率分别高达 34.7%、37.4%、36. 7%, NMF 明显促进正常胎鼠皮层神经元存活卒,与对照组比较,10nmol·L^-1 NMF 对皮层神经元的存活率分别提高 39.3%、73.5%。 NMF能显著 对抗 KA 所致的神经元损伤,与 KA 损伤组相比, NMF0.1、10、10nmol·L^-1对损伤皮层神经元的保护率分别为 77.30%、80.10%、84.15%。结论: NMF 明 显促进胎鼠皮层神经元的洁性、提高正常皮层神经元,的存活卒,并能有效地保护KA所致的神经元损伤,提示 NMF 是一种很有潜力的治疗 AD 的药物。     

The First Phase of the SRIF Industrialized Base in ＂West Area＂ Has Been Put into Operation

After nearly two years＇ tense construction, the first phase of industrialized base of Shenyang Research Institute of Foundry （SRIF）, located at the Tiexi Casting and Forging Industrial Park in the west of Tiexi District, has now been completed and formally put into operation.     

THERMODYNAMICS STUDY ON THE DECOMPOSITION OF CHROMITE WITH KOH

Institute of Process Engineering, Chinese Academy of Sciences, China, has proposed a method for oxidative leaching of chromite with potassium hydroxide. Understanding the mechanism of chromite decomposition, especially in the potassium hydroxide fusion, is important for the optimization of the operating parameters of the oxidative leaching process. A traditional thermodynamic method is proposed and the thermal decomposition and the reaction decomposition during the oxidative leaching of chromite with KOH and oxygen is discussed, which suggests that chromite is mainly destroyed by reactions with KOH and oxygen. Meanwhile, equilibrium of the main reactions of the above process was calculated at different temperatures and oxygen partial pressures. The stable zones of productions, namely, K2CrO4 and Fe2O3, increase with the decrease of temperature, which indicates that higher temperature is not beneficial to thermodynamic reactions. In addition, a comparison of the general alkali methods is carried out, and it is concluded that the KOH leaching process is thermodynamically superior to the conventional chromate production process.     

INFLUENCE OF HEAT TREATMENT ON DAMPING BEHAVIOUR OF THE MAGNESIUM WROUGHT ALLOY AZ61

The effect of isochronal heat treatments for 1h on variation of damping, hardness and microstructural change of the magnesium wrought alloy AZ61 was investigated. Damping and hardness behaviour could be attributed to the evolution of precipitation process. The influence of precipitation on damping behaviour was explained in the framework of the dislocation string model of Granato and Lücke.     

Theoretical Analysis for the Motion and Temperature of Melt Droplets in Spray Degassing Process

The motion of melt droplets in spray degassing process was analyzed theoretically. The height of the treatment tank in spray degassing process could be determined by the results of theoretical calculation of motion of melt droplets. To know whether the melt droplets would solidify during spraying process, the balance temperature of melt droplets was also theoretically analyzed. Then proof experiments for theoretical results about temperature of melt droplets were carried. In comparison, the experimental results were nearly similar to the calculation results.     

Growth Kinetics of Single Inclusion Particle in Molten Melts

On the basis of the single-particle framework, a new theory on inclusion growth in metallurgical melts is developed to study the kinetics of inclusion growth on account of reaction and collision. The studies show that the early growth of inclusion depends on reaction growth and Brawnian motion collision, and where the former is decisive, the late growth depends on turbulence collision and Stokes＇ collision, and where the former is dominant; collision growth is very quick during the smelting process, lessened in the refining process, but nearly negligible in the continuous casting process.     

Three-Dimensional Growth of Coherent Ferrite in Austenite: A Molecular Dynamics Study

Coherent second phase often exhibits anisotropic morphology with specifi c orientations with respect to both the second and the matrix phases. As a key feature of microstructure, the morphology of the coherent particles is essential for understanding the second-phase strengthening eff ect in various industrial alloys. This letter reports anisotropic growth of coherent ferrite from austenite matrix in pure iron based on molecular dynamics simulation. We found that the ferrite grain tends to grow into an elongated plate-like shape, independent of its initial confi guration. The fi nal shape of the ferrite is closely related to the misfi t between the two phases, with the longest direction and the broad facet of the plate being, respectively, consistent with the best matching direction and the best matching plane calculated via the Burgers vector content(BVC) method. The strain energy calculation in the framework of Eshelby's inclusion theory verifi es that the simulated orientation of the coherent ferrite is energetically favorable. It is anticipated that the BVC method will be applicable in analysis of anisotropic growth and morphology of coherent second phase in other phase transformation systems.     

An Easy Way to Quantify the Adhesion Energy of Nanostructured Cu/X(X=Cr,Ta,Mo,Nb,Zr) Multilayer Films Adherent to Polyimide Substrates

An approach based on film buckling under simple uniaxial tensile testing was utilized in this paper to quantitatively estimate the interfacial energy of the nanostructured multilayer films(NMFs) adherent to flexible substrates. The interfacial energies of polyimide-supported NMFs are determined to be *5.0 J/m2 for Cu/Cr, *4.1 J/m2 for Cu/Ta,*2.8 J/m2 for Cu/Mo, *1.1 J/m2 for Cu/Nb, and *1.2 J/m2 for Cu/Zr NMFs. Furthermore, a linear relationship between the adhesion energy and the interfacial shear strength is clearly demonstrated for the Cu-based NMFs, which is highly indicative of the applicability and reliability of the modified models.     

High-Speed Friction Stir Welding of SiC_p/Al–Mg–Si–Cu Composite

A 17 vol% SiCp/Al–Mg–Si–Cu composite plate with a thickness of 3 mm was successfully friction stir welded(FSWed) at a very high welding speed of 2000 mm/min for the first time. Microstructural observation indicated that the coarsening of the precipitates was greatly inhibited in the heat-affected zone of the FSW joint at high welding speed, due to the significantly reduced peak temperature and duration at high temperature. Therefore, prominent enhancement of the hardness was achieved at the lowest hardness zone of the FSW joint at this high welding speed, which was similar to that of the nugget zone. Furthermore, the ultimate tensile strength of the joint was as high as 369 MPa, which was much higher than that obtained at low welding speed of 100 mm/min(298 MPa). This study provides an effective method to weld aluminum matrix composite with superior quality and high welding efficiency.