本文選題：激光熔覆　切入點(diǎn)：綜合跳動(dòng)　出處：《稀有金屬材料與工程》2017年03期 　論文類型：期刊論文

【摘要】：為解決大型汽輪機(jī)轉(zhuǎn)子軸軸頸磨損的修復(fù)問題,基于同軸送粉半導(dǎo)體激光熔覆再制造系統(tǒng),采用激光熔覆再制造方法,以汽輪機(jī)轉(zhuǎn)子軸材料為基體,利用激光熔覆再制造專用粉末作為實(shí)驗(yàn)材料,針對(duì)不同激光熔覆層寬度對(duì)汽輪機(jī)轉(zhuǎn)子綜合跳動(dòng)的影響進(jìn)行實(shí)驗(yàn)研究與機(jī)理模擬驗(yàn)證。結(jié)果表明,綜合跳動(dòng)特性與探頭直徑和激光熔覆層寬度相關(guān),激光熔覆層寬度決定了汽輪機(jī)轉(zhuǎn)子表面磁力線、電渦流密度與磁通量密度分布。當(dāng)激光再制造層寬度小于8 mm時(shí),由于磁力線與表面電渦流密度受基體的干擾,磁通量密度在激光熔覆層的邊緣出現(xiàn)突變,實(shí)際綜合跳動(dòng)的測(cè)量值為基體與激光熔覆層綜合作用的結(jié)果,造成測(cè)量結(jié)果偏大。根據(jù)數(shù)值模擬計(jì)算被測(cè)金屬體表面磁通量密度分布結(jié)果,激光熔覆層寬度的臨界值為9.82 mm。
[Abstract]:In order to solve the problem of repairing the wear of shaft neck of large steam turbine rotor, based on the coaxial powder feeding semiconductor laser cladding remanufacturing system, the method of laser cladding remanufacturing was adopted, and the rotor shaft material of steam turbine was used as matrix. The effects of laser cladding layer width on the comprehensive runout of steam turbine rotor were studied by using laser cladding and remanufacturing special powder as experimental materials. The results show that, The runout characteristics are related to the probe diameter and the width of the laser cladding layer. The laser cladding layer width determines the distribution of the magnetic field line, eddy current density and magnetic flux density on the rotor surface of the turbine. When the width of the laser remanufacturing layer is less than 8 mm, Due to the interference of the magnetic field line and the surface eddy current density by the matrix, the magnetic flux density changes at the edge of the laser cladding layer. The measured value of the actual synthesis runout is the result of the combined action of the substrate and the laser cladding layer. The results show that the critical value of laser cladding width is 9.82 mm.
【作者單位】： 中原工學(xué)院;浙江工業(yè)大學(xué);浙江省高端激光制造裝備協(xié)同創(chuàng)新中心;
【基金】：Key Scientific Research Project for Colleges and Universities of Henan Province(15A460038) National Natural Science Foundation of China(51505506)
【分類號(hào)】：TG174.4

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