g32柴油机主轴承盖铸造缺陷的防止措施 measures to prevent casting defects of main bearing cups used for g32 diesel engine.pdfVIP
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g32柴油机主轴承盖铸造缺陷的防止措施 measures to prevent casting defects of main bearing cups used for g32 diesel engine
蹙淞
(1Ⅱt311南车共享铸造有限公司,四川资阳641301)
摘要:介绍了G32柴油机主轴承盖的铸件结构及技术要求。由于采用原铸造工艺生产的铸件存在较严重的缩孔、缩松及
磁粉探伤磁痕等质量问题,为查明缺陷的产生原因,对铸件结构、铸造工艺等情况进行了分析,最后通过调整浇注系统、
浇注温度、冷铁数量和位置、改进冒口等措施,试生产了220件主轴承盖,结果显示:有9件铸件报废,其中粘砂、夹渣各
报废1件,胀箱报废2件,缩孔、缩松报废5件,总废品率降到4.1%,缩孔、缩松缺陷等到了控制,铸件质量也有了显著
提高。
关键词:球墨铸铁;主轴承盖;缩孔;缩松;磁粉探伤
中图分类号:TG255 文献标识码:B 文章编号:1003—8345(2016)01—0034—03
DOI:10.3969/j.issn.1003-8345.2016.01.004
MeasurestoPrevent DefectsofMain UsedforG32Diesel
Casting BearingCups Engine
TANG
Song
(SichuanCSRKocel 641301,China)
CastingCo.,Ltd.,Ziyang
Abstract:The andtechnical ofmain usedforG32diesel were
castingconfiguration requirementsbearingcup engine
introduced.Sincethere serious cavitiesand aswellas trace
relativelyqualityproblemsincludingshrinkage porosities magnetic
in detectiontestwere withthe ordertorevealthe
method,in
magnetic existing castingsproducedbyusingoriginalcasting
relevantsituationssuchasthe methodeta1.were
reasons,the
defects-causing castingconstruction,casting analyzed.Finally,
numberandtheir a1.220 of
by risers,et
adjustinggatingsystem,pouringtemperature,chills settinglocations,improvingpieces
main were on of 1
trial.Theresultshowed:9 were dueto
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