摘要
依据磨鞋硬质合金堆焊层断裂、磨损及剥落的失效形式,自制4种堆焊焊条并对铸造碳化钨堆焊层进行淬火或淬火+深冷处理。试验证实自制焊条碳化钨和管皮重量比直接影响到抗冲击磨损性能及碳化钨的剥落。碳化钨和管皮重量比恰当,堆焊层硬质相的阴影效应和基体、粘结相对硬质相支撑效应的相互作用是提高抗冲击磨损的原因。淬火及淬火+深冷处理磨鞋堆焊层,其抗冲击磨损性能比铸造碳化钨堆焊层分别提高17.4%和43.0%。组织分析表明深冷处理对堆焊层硬质相影响不大,其组织仍为η+M6C+M23C6+M7C3。其粘结相成分、形态、分布的变化是深冷处理提高抗冲击磨损性能的原因。
Four types of surfacing welding electrodes ware homemade and foundry tungsten carbide welding seam is quenched or deep cooling treated according to fragmentation, abrasion and desquamation failure form of sintered-carbide welding layer of milling shoe. N and K model electrodes used in test is flaked likely. Thin canal cast tungsten carbide welding rod possesses the best impact abrasion resistance. The weight ratio of tungsten carbide and thin tube affects directly on peening wear resistance and peeling of tungsten carbide. The reciprocity of shadow effect of hard phase of welding seam and fasten effect of basal body and bonding phase to hard phase is the reason of strengthening impact abrasion resistance if the weight ratio of tungsten carbide and thin tube is suitable. The impact abrasion resistance of cast tungsten carbide welding layer of milling shoe increases 17.4% by quenching. It also increases 43% by cryogenic treatment after quenching. Structure analysis shows that hard phase of welding layer has little been affected by cryogenic treatment. The Structure is also η+ M6C + M23C6+ M7C3。the change of component , shape and distribution of bond phase is the main reason of enhancing impact abrasion resistance.
出处
《西南石油大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2007年第6期145-148,共4页
Journal of Southwest Petroleum University(Science & Technology Edition)
基金
'石油天然气装备'省部共建教育部重点实验室项目(JZTZ-0501)
