失效分析与预防
失效分析與預防
실효분석여예방
FAILURE ANALYSIS AND PREVENTION
2014年
3期
178-182
,共5页
刘晶%张立新%白皓%张银东
劉晶%張立新%白皓%張銀東
류정%장립신%백호%장은동
马氏体热强不锈钢%作动筒%裂纹%电子束焊%结构
馬氏體熱彊不鏽鋼%作動筒%裂紋%電子束銲%結構
마씨체열강불수강%작동통%렬문%전자속한%결구
heat-resisting martensitic stainless steel%actuating cylinder%crack%electron beam welding%structure
由1Cr11Ni2W2MoV马氏体热强不锈钢经电子束焊接的发动机带管路液压作动筒，在焊后打压时或工厂试车后多次出现漏油故障。为了研究其失效机理，采用宏观检查、金相分析、断口观察、硬度测试等方法对作动筒材料、焊接工艺、焊接质量进行研究，并开展了相关试验。结果表明：作动筒焊缝裂纹是由于电子束焊设备出现了不稳定现象引起的；改用其他设备焊接裂纹不再产生。
由1Cr11Ni2W2MoV馬氏體熱彊不鏽鋼經電子束銲接的髮動機帶管路液壓作動筒，在銲後打壓時或工廠試車後多次齣現漏油故障。為瞭研究其失效機理，採用宏觀檢查、金相分析、斷口觀察、硬度測試等方法對作動筒材料、銲接工藝、銲接質量進行研究，併開展瞭相關試驗。結果錶明：作動筒銲縫裂紋是由于電子束銲設備齣現瞭不穩定現象引起的；改用其他設備銲接裂紋不再產生。
유1Cr11Ni2W2MoV마씨체열강불수강경전자속한접적발동궤대관로액압작동통，재한후타압시혹공엄시차후다차출현루유고장。위료연구기실효궤리，채용굉관검사、금상분석、단구관찰、경도측시등방법대작동통재료、한접공예、한접질량진행연구，병개전료상관시험。결과표명：작동통한봉렬문시유우전자속한설비출현료불은정현상인기적；개용기타설비한접렬문불재산생。
Aero-engine hydraulic actuating cylinders of 1Cr11Ni2W2MoV heat-resisting martensitic stainless steel by electron beam welding were found to leak oil after welding bulge testing or factory testing. In order to find out the failure cause, macro and micro observation, metallographic examination, and hardness testing were carried out. The material, welding method and quality were investigated. The results show that the welding cracks of the failed actuating cylinders were attributed to unstable processing parameters during welding. The cracks could be avoided by using other equipment with stable processing parameters.
