液压阀铸件中光亮碳的产生原因及控制  

Cause and control of bright carbon in hydraulic valve casting

作　　者：孙祥广 秦程 周正寿 SUN Xiangguang;QIN Cheng;ZHOU Zhengshou

机构地区：[1]江苏恒立液压股份有限公司常州铸造分公司,江苏常州213164

出　　处：《现代机械》2025年第1期106-109,共4页Modern Machinery

摘　　要：液压阀块在测试时出现泄漏现象,对泄漏位置进行剖切,发现光亮碳缺陷。本文介绍了液压阀铸件出现光亮碳缺陷的位置和形貌,利用电镜和能谱分析了产生光亮碳缺陷的原因,得出防止光亮碳产生的措施:(1)提高浇注温度;(2)提高浇注速度;(3)降低覆膜砂中树脂的加入量;(4)优化砂芯排气。Leakage occurred when testing a hydraulic valve block.After sectioning the leakage area,bright carbon defect was found.This article introduces the position and appearance of the bright carbon defect on the hydraulic valve casting.The causes of the bright carbon defect are analyzed using SEM and EDS,and the measures to avoid the defect are summarized as follows:(1)increasing pouring temperature;(2)increasing pouring speed;(3)reducing the addition amount of resin in the precoated sand;(4)optimizing the venting of the core.

关 键 词：光亮碳 液压阀 球墨铸铁 工艺优化 

分 类 号：TG255[金属学及工艺—铸造]