Transactions of Materials and Heat Treatment

Title：Parting face crack analysis of traveling crane wheel drop forgings of Φ550 mm

Authors： CHENG Li1 GONG Chao2(1.College of Materials Science and Engineering Chongqing Institute of Technology Chongqing 400050 China 2.Chongqing Heavy-Duty Forging and Casting Plant Chongqing 400083 China)

Unit：

KeyWords： drop forging crack in parting face forging offset trimming

ClassificationCode：TG316

year,vol(issue):pagenumber：2008,33(1):24-26

Abstract：

Three quarter die forgings were broken along parting line among 150 forgings of Ф550mm traveling crane wheels forged on drop hammer of 16t.The warp flash was produced and some of them were remained after trimming.The forging procedure tracing and parting face structure analyzing were performed.The result shows that wheel breaking along parting line is caused by trimming flash.Forging offset causes error repairing pattern.The main reason is the impression offset in forging which causes bigger trimming width and force.

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Reference：

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