特钢技术
特鋼技術
특강기술
SPECIAL STEEL TECHNOLOGY
2015年
2期
21-23,26
,共4页
探伤%性能%合格率
探傷%性能%閤格率
탐상%성능%합격솔
UT%Property%Qualification rate
船用发动机曲轴用钢SF690技术要求高，特别是探伤、性能要求极其严格，超声波探伤要≤Φ2mm，相当于电渣钢水平，整体试样强度要求≥730MPa；通过对“电炉+LF+VD+锻制”的工艺试制船用发动机曲轴用钢SF690的论述，指出了合理的冶炼（控Al脱氧）制度与锻造控制制度是试制成功的关键。经过调整、优化生产工艺使产品合格率达到95%。
船用髮動機麯軸用鋼SF690技術要求高，特彆是探傷、性能要求極其嚴格，超聲波探傷要≤Φ2mm，相噹于電渣鋼水平，整體試樣彊度要求≥730MPa；通過對“電爐+LF+VD+鍛製”的工藝試製船用髮動機麯軸用鋼SF690的論述，指齣瞭閤理的冶煉（控Al脫氧）製度與鍛造控製製度是試製成功的關鍵。經過調整、優化生產工藝使產品閤格率達到95%。
선용발동궤곡축용강SF690기술요구고，특별시탐상、성능요구겁기엄격，초성파탐상요≤Φ2mm，상당우전사강수평，정체시양강도요구≥730MPa；통과대“전로+LF+VD+단제”적공예시제선용발동궤곡축용강SF690적논술，지출료합리적야련（공Al탈양）제도여단조공제제도시시제성공적관건。경과조정、우화생산공예사산품합격솔체도95%。
Crankshaft steel SF690 for marine engine is of high technical requirement, especially requirement for ultrasonic test and mechanical properties.The UT criterion not more thanΦ2mm is required ,which is similar to ESR steel. The strength of the steel sample shall be≥730MPa.After trial production of crankshaft steel SF690 for marine en?gine by adopting the process of EF→LF→VD→Forging, it is concluded that the reasonable smelting regime(Al control, deoxidation) and forging regime are the key points for successful trial production. After improvement of production pro?cess, the qualification rate of products reached 95%.
