硼对液压支架立柱等离子熔敷涂层组织性能的影响

发布时间：2018-01-20 04:35

本文关键词： 等离子熔敷液压支架立柱熔敷层　出处：《焊接学报》2017年04期 　论文类型：期刊论文

【摘要】：使用自制药芯焊丝等离子熔敷技术在液压支架立柱表面制备高硼熔敷层,分别研究了硼对熔敷层显微组织、结构、显微硬度、耐磨性、耐蚀性的影响.结果表明,四组高硼熔敷层成形良好,无裂纹,组织均匀致密.随硼含量的增加,熔敷层的显微硬度先增加后降低,最大为440 HV20,耐磨性与硬度呈对应关系;盐雾试验480 h后1号,2号熔敷层未出现腐蚀点,表现出良好的耐蚀性.综合分析表明,B元素含量为1.150%时,在保证硬度和耐磨性能的同时,盐雾腐蚀480 h未出现腐蚀点,满足液压支架立柱的使用要求.
[Abstract]:High boron cladding layer was prepared on the surface of hydraulic support column by plasma cladding technology of self-made flux-cored wire. The microstructure, structure, microhardness and wear resistance of boron cladding layer were studied respectively. The results show that the four groups of high boron cladding coatings are well formed, without cracks, and the microstructure is uniform and compact. With the increase of boron content, the microhardness of the deposited coatings increases first and then decreases, and the maximum is 440 HV20. Wear resistance and hardness show a corresponding relationship; After 480 h of salt spray test, no corrosion point appeared in the first and second layers, which showed good corrosion resistance. The comprehensive analysis showed that the hardness and wear resistance were guaranteed when the content of B element was 1.150. No corrosion point was found in salt spray corrosion for 480 h, which satisfied the requirements of hydraulic support column.
【作者单位】：北京工业大学材料科学与工程学院;
【基金】：先进焊接与连接国家重点实验室基金资助项目(AWJM13-01)
【分类号】：TD355;TG174.4
【正文快照】： 0序言液压支架作为煤矿综采面的核心设备,其工作面成套设备成本的60%用于液压支架的投入[1],井下复杂的工况使液压支架立柱使用1~3年后就因失效而对其修复,因此,研究用于提高液压支架立柱表面硬度、耐磨性、耐腐蚀性能的方法来延长液压支架的使用寿命具有很高的经济效益和社会

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