高炉料钟,料斗配合表面自动埋弧堆焊焊接工艺

采用自动埋弧堆焊的方法对炼铁料钟、料斗配合表面进行堆焊，用１Ｃｒ１８Ｎｉ９Ｔｉ作为堆焊的过渡层，３Ｃｒ２Ｗ８作为堆焊层，提高了接合面的强度及耐磨性，从而延长了料钟、料斗的使用寿命及设备检修周期，提高了生产效率。     

新型弧焊装备技术的研究及应用

阐述了新型弧焊装备技术项目研究阶段性成果,重点介绍由弧焊二次变流器和弧压传感送丝机组成的多站式高速高效焊接系统的基本原理和典型用户使用效果。提出了新型弧焊装备技术构架,详细介绍各组成部分的技术特点和技术创新、多种材料的焊接工艺实验情况以及在压力容器、造船、汽车、电力等行业的应用状况,表明新型弧焊装备具有性能稳定、可靠性高、操控性良好、焊接成形良好、焊接接头质量优异等特点。     

超薄尼龙印花织物水洗工艺研究

在超薄尼龙印花织物水洗过程中,通过对织物轻薄、透水性差等特性的分析,制定了合理的水洗工艺,解决了牢度差、沾色（搭色）、纬弧等常见问题。     

镍合金等离子弧焊设备研制及工艺优化

镍是一种耐高温耐腐蚀的金属,广泛应用于各个领域,但是在焊接过程中容易出现气孔、裂纹等缺陷,严重影响了焊接质量。针对镍及镍基合金的特殊性以及在焊接过程中易出现的问题,选择由PLC控制的等离子弧焊焊接镍板。叙述了焊接设备的组成以及焊接工艺参数对焊接过程的影响,优化了工艺参数,在生产应用中具有参考价值。     

抗吸潮碱性烧结焊剂的试验研究

介绍了一种新型高强钢埋弧焊用碱性烧结焊剂(SJ—K1)。该焊剂具有良好的工艺性能,电弧燃烧稳定,尤其是具有较强的抗吸潮性,这种焊剂配合H08A,H10Mn2或其它合金焊丝可用于低合金高强度钢焊接,并可获得氧含量和扩散氢含量低、却贝冲击韧性高的焊缝金属。     

Investigation of the gas bubble dynamics induced by an electric arc in insulation oil

In this work, experimental and theoretical studies were carried out on arc-induced bubble dynamic behaviors in insulation oil. Direct experimental evidence indicated that the arc-induced bubble experiences pulsating growth rather than a continuous expansion. Furthermore, a theoretical model and numerical calculation method were proposed, which revealed the dynamic mechanism of bubble growth. Good agreement between the theoretical results and experimental observations verified the general correctness and feasibility of the proposed method.     

A review on the fundamentals of hydrogen-based reduction and recycling concepts for electric arc furnace dust extended by a novel conceptualization

The European Green Deal aims to make Europe climate neutral by 2050. This circumstance requires the metallurgical industry to move from carbon-based processes to hydrogen application. This work aims to summarize the current state of the research on thermodynamics and reaction kinetics in the scope of hydrogen-based reduction for Electric Arc Furnace Dust and present already existing and theoretically possible recycling processes using hydrogen. Thermodynamic calculations suggest three possible approaches to treat Electric Arc Furnace Dust using hydrogen as a reducing agent: Full reduction of iron and zinc oxide, selective reduction of iron oxide, and selective reduction of zinc oxide. In general, hydrogen can replace carbon seamlessly, leading to higher reaction kinetics but also to higher processing costs due to the high hydrogen price currently. However, zinc extraction from Electric Arc Furnace Dust allows for innovative concepts such as hydrogen recovery by reoxidation of gaseous zinc with water. In combination with selective zinc oxide reduction, this approach results in a recycling process with a low hydrogen consumption. However, additional high-quality research is necessary to provide a better data basis for a detailed economic view.     

Anisotropy in Microstructures and Mechanical Properties of 2Cr13 Alloy Produced byWire Arc Additive ManufacturingEI北大核心CSCD

2Cr13 martensite stainless steel has been widely used for the manufacturing of surgical tools and turbine blades. Contrary to the conventional fabrication technologies, there are several remarkable advantages in the fabrication of 2Cr13 parts by adopting wire arc additive manufacturing (WAAM) technologies, such as excellent metallurgical bonding, high production efficiency, near-net-shape production, and limited environmental contamination. In this work, the effect of interlayer dwelling temperature (110-550 degrees C) on microstructural and mechanical properties has been revealed, providing a new approach for the active control of the performances of 2Cr13 buildups produced by wire-arc additive manufacturing. The part with a dwelling temperature of 550 degrees C was featured by elongated acicular martensite features, with a slightly enhanced fiber-like texture, along with minor fine irregular-reverse austenite structures, dispersed among martensite gaps. This special martensitic distribution was mainly caused by the grain-broken effect under the intensive thermal shock from liquid melting pool. Consequently, the enhanced tensile strength and microhardness were obtained due to grain refinement, although exhibiting an obvious anisotropy in tensile properties. The parts with dwelling temperatures of 110-180 degrees C were characterized by relatively coarsened martensite laths, with a random texture type, within block-shaped ferrite matrix. The average martensite size was gradually refined due to the increased cooling rate by lowering interlayer temperature. The isotropic mechanical properties of all three parts (110-180 degrees C) were similar because of the similar martensite laths.     

A study of arc stability of basic electrode in view of uniform design method

In order to develop a basic electrode with low fume and good usability, a uew slag system has been designed after analyzing several basic electrode slag systems. Then in view of uniform design method, arranging the experiment points by it, the influenced laws of the uew system coating compouents on the arc stability had been searched. In the formula, niue coating compouents were taken as independent variables and they were divided into six levels in all twenty-four experiments. The arc stability was taken as function and taken down the data when welding and then put them into the computer to be processed statistically. The analysis results give the mathematical model and trend diagrams between independent variables and the function. They indicate that the effects of many coating compouents on the arc stability are in the mutual form. The mutual effects between CaCO3 and BaF2, BaF2 and BaCO3 , increases the arc stability separately. While the mutual effects between CaF2 and iron powder, the square item of iron powder itself decreases the arc stability separately.     

提高小口径深孔阀门密封面抗高温水蒸气腐蚀性能的研究

设计了一套高温水蒸气腐蚀的试验装置,利用这套装置对比了用于小口矩深孔阀门密封面上的三种焊层的抗高温水蒸气腐蚀性能,这三种焊层分别为：激光熔覆ＷＦ１４１合金层,手工电弧堆焊“丝１１１”和“堆５４７Ｍｏ”合金层。采用金相显微镜、Ｘ射线射仪、扫描电镜和能谱分析仪对腐蚀试样进行了分析,讨论了合金成分、焊层工艺等对密封面高温水蒸气腐蚀行为的影响,结果表明,激光熔覆ＷＦ１４１合金层具有优异的抗高温水蒸气腐蚀性