铸造湿型小件缺陷产生的原因与控制

通过对铸造湿型小件产品缺陷典型实例的原因分析，从型砂的选择及配制、造型工艺、浇注工艺等方面提出控制缺陷产生的工艺方法。     

焦炉装煤逸散物控制实践

分析了焦炉装煤过程烟尘产生的原因，介绍了焦炉装煤逸散物控制的新方法，以及实施后的效果。     

保护浇注在连铸生产中的实践

通过生产实践，讨论了连铸机保护浇注在推广应用中的措施，阐述了保护浇注对提高铸坯质量所起的作用。     

板方坯连铸机技术改造

通过加强技术管理、促进品种开发、依靠技术进步，先后对转炉进行自动化改造、板方坯连铸机改造、合金烘烤配套使用，通过技术进步，促进连铸各项指标全面提升。     

磁选厂选矿比与精矿品位经济关系的研究

通过研究同一选矿厂不同选矿流程精矿品位与选矿比的数学关系,探索了铁精矿粉不同品位的合理价格     

印制电路板的抗干扰设计

以印制电路板的电磁兼容性为核心,分析了电磁干扰的产生机理,详细介绍了在设计、装配印制电路板时的抗干扰措施。     

成型调整对螺旋埋弧焊管焊接质量的影响分析

通过对埋孤焊钢管的成型原理，成型过程带钢的弹复变形及对成型过程的影响进行分析，明确生产过程各因素对成型过程、焊接过程的作用，提出了进行控制的方法，以有效提高埋孤焊钢管的焊接质量。     

发挥水电资源优势加快农村水电开发

本文分析总结小水电建设对促进区域经济社会可持续发展的作用,联系临夏县实际,分析当地发展小水电建设的资源优势、建设现状,总结近年来小水电建设上的主要做法,提出加快小水电发展的保障措施.     

Microstructure evolution and room temperature deformation of a directionally solidiied Nb-Si-Ti-Cr-Al-Hf-Y alloy简

An Nb-14Si-22Ti-4Cr-2AI-2Hf-0.15Y（at.%） alloy was prepared by directional solidification （DS） with liquid metal cooling, and the withdrawal rates selected were 1.2, 6, and 18 mm-min1, respectively. The Influence of withdrawal rate and heat treatment on the microstructural evolution, fracture toughness and tensile strength at room temperature were investigated. Results show that the directionally solidified microstructure is composed of primary （Nb, X）ss dendrites and （Nb, X）ss/a-（Nb, X）5Si3 eutectic cells aligning with the growth direction. The formation of bulk Nb3Si is suppressed. With an increase in withdrawal rate, the dendrite arm spacing of （Nb, X）ss decreases, and the （Nb, X）ss/a-（Nb, X）5Si3 eutectic cells become finer and distribute homogeneously. Directional solidification can significantly improve the room temperature fracture toughness, especially the alloy with a withdrawal rate of 6 mm.min-1; its average value reaches 14.1 MPa.m^0.5, about 34% higher than that of the alloy without directional solidification. The withdrawal rate has obvious effect on tensile strength, and the tensile strength is improved from 200 MPa to 429 MPa as the withdrawal rate increases from 1.2 mm.min-1 to 1.8 mm-min-1. After heat treatment, the primary （Nb, X）ss branches become coarser; both the room temperature fracture toughness and tensile strength of the alloys solidified at 1.2 and 6 mm.min 1 are somewhat lower than the corresponding values of the alloy without heat treatment, while they are higher than the corresponding values of the alloy without heat treatment when solidified at 18 mm-min4.