| 鞭式刀具的失效及火焰喷焊NiWC强化的可行性研究 |
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| 引用本文： | 郝建军,马跃进,刘占良,申玉增.鞭式刀具的失效及火焰喷焊NiWC强化的可行性研究[J].农业工程学报,2005,21(8):74-77. |
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| 作者姓名： | 郝建军 马跃进 刘占良 申玉增 |
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| 作者单位： | 1. 河北农业大学机电工程学院,保定,071001;北京科技大学材料科学与工程学院,北京,100083
2. 河北农业大学机电工程学院,保定,071001 |
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| 基金项目： | 河北省科技厅项目部分内容(项目编号：03212157) |
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| 摘 要： | 为解决秸秆根茬切碎还田机鞭式刀具成本高、寿命短的问题，在45#钢基体上制备了火焰喷焊Ni60和NiWC喷焊层。分析了鞭式刀具的失效机理；用金相显微镜观察了刀具的宏观磨损形貌和喷焊层的结合状况；运用能模拟刀具实际工作状况的自制磨损试验机进行了磨损实验，对比了65Mn淬火回火与火焰喷焊Ni60和NiWC喷焊强化刀具的耐磨性能；探讨了火焰喷焊NiWC喷焊层用于鞭式刀具强化的可行性。结果表明，火焰喷焊NiWC喷焊层具有良好的耐磨性，可用于秸秆根茬切碎还田机鞭式刀具的表面强化和修复。
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| 关 键 词： | 秸秆根茬切碎还田机 鞭式刀具 火焰喷焊 耐磨性 可行性 |
| 文章编号： | 1002-6819(2005)08-0074-04 |
| 收稿时间： | 2004-09-15 |
| 修稿时间： | 2005-02-23 |
Failure of scourge-type reamer and feasibility of strengthening by flame spray welding NiWC coatings |
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| Hao Jianjun,Ma Yuejin,Liu Zhanliang and Shen Yuzeng.Failure of scourge-type reamer and feasibility of strengthening by flame spray welding NiWC coatings[J].Transactions of the Chinese Society of Agricultural Engineering,2005,21(8):74-77. |
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| Authors: | Hao Jianjun Ma Yuejin Liu Zhanliang and Shen Yuzeng |
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| Abstract: | In order to solve the problem of high-priced and short-lifetime of straw stubble returning machinery, the Ni60 and NiWC coatings were prepared on the surface of 45# steel specimens by flame spray welding. The failure mechanism of scourge-type reamer was analyzed. The worn macro-appearance and bonding status between substrate and coatings were observed with metallographic microscope. Wear test was conducted using self-made testing machinery which can imitate the actual working condition of scourge-type reamer. The abradability of strengthened coatings, which were made by quench and tempering 65Mn and flame spray welding Ni60 and NiWC alloy, was contrasted. The feasibility of flame spray welding NiWC coatings used to strengthen scourge-type reamer was discussed. The results show that the coatings of flame spray welding NiWC have high anti-wear performance and can be used to strengthen and repair the scourge-type reamer of straw stubble returning machinery. |
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| Keywords: | straw stubble returning machinery scourge-type reamer flame spray welding wear resistance feasibility |
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