本文選題：離心泵　切入點(diǎn)：葉輪　出處：《水泵技術(shù)》2016年04期 　論文類型：期刊論文

【摘要】：某大型工業(yè)離心泵在生產(chǎn)運(yùn)行中轉(zhuǎn)子葉輪口環(huán)發(fā)生撕裂。通過外觀檢查、成分分析、斷口分析、金相組織分析和硬度測(cè)試等手段對(duì)斷裂性質(zhì)進(jìn)行診斷,分析口環(huán)撕裂原因。結(jié)果表明:材質(zhì)確為ZG06Cr13Ni4Mo,基體組織均為回火索氏體加逆轉(zhuǎn)變奧氏體。可以診斷斷裂性質(zhì)為脆性斷裂,口環(huán)撕裂的主要原因是由于基體材質(zhì)中存在大量的非金屬夾雜物并存在鏈狀分布的情況,嚴(yán)重破壞了基體的連續(xù)性,導(dǎo)致葉輪口環(huán)的力學(xué)性能下降。在運(yùn)行過程中的工作載荷作用下,裂紋首先在葉輪口環(huán)材質(zhì)基體中的鏈狀非金屬夾雜物處萌生,并沿著非金屬夾雜物擴(kuò)展直至口環(huán)發(fā)生撕裂,從而引發(fā)葉輪失效。
[Abstract]:In the production and operation of a large scale industrial centrifugal pump, the rotor impeller opening ring is torn. The fracture properties are diagnosed by means of appearance inspection, composition analysis, fracture analysis, metallographic analysis and hardness testing. The results show that the material is ZG06Cr13Ni4Mo.The matrix structure is tempering Soxhlet and reverse austenite. The fracture property can be diagnosed as brittle fracture. The main reason for the tear of the oral ring is the existence of a large number of non-metallic inclusions and chain distribution in the matrix material, which seriously destroys the continuity of the matrix. The mechanical properties of the impeller ring are decreased. Under the working load during operation, the crack first sprouts at the chain-like nonmetallic inclusion in the material matrix of the impeller ring, and extends along the non-metallic inclusion until the mouth ring is torn. Thus causes impeller failure.
【作者單位】： 重慶水泵廠有限責(zé)任公司;
【分類號(hào)】：TH311;TG115
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本文編號(hào)：1611349