大断面铸态球墨铸铁支撑架的工艺实践.pdfVIP

学兔兔 铸 造 Apr．2013 · 346· FOUNDRY Vo1．62 NO．4 大断面铸态球墨铸铁支撑架的工艺实践 盖志宏 ，刘全荣 ，孙新明 (1．汇丽机电有限公司，浙江慈溪315333；2．汇丽机电有限公司铸造分公司，浙江慈溪315333) 摘要：大断面铸态球墨铸铁支撑架铸件，大部分壁厚237 mm，要求厚大部位100％超声波探伤检测。根据铸件的结构 及技术要求制定了合理的浇注和熔炼工艺，通过对原材料及化学成分的严格控制，并选择合适的添加元素，成功生 产了支撑架铸件。检测附铸试块的化学成分及力学性能完全满足技术要求，为厚大球铁件的质量稳定控制提供了很 好的生产经验。 关键词：大断面铸态球墨铸铁；铸造工艺；超声波检测 中图分类号：TG143．5 文献标识码：B 文章编号：1001—4977(2013)04—0346—03 Process Practice of As-Cast Ductile Iron Support Frame with Heavy Section GAI Zhi—hong ，LIU Quan-rong~，SUN Xin—ming~ (1．Cixihuili Machinary and Electric Co．，Ltd．，Cixi 315333，Zh~iang，China； 2．Foundry Plant ofCixihuili Machinary and Electric Co．，Ltd．，Cixi 315333，Zh@ang，China) Abstract：Most thickness ofthe as．cast ductile iron support flame with heavy section is 237 mm．The heaw~ section needs 1 00％ultrasonic test．Both rational pouring process and melting process were designed according to the casting structure and technique requirements．As—cast ductile iron support flame with heavy section was successfully produced on the basis of the strict control raw materials and chemical composition．However． adding some suitable amount ofalloy elements to the molten iron is very important too．The results ofinspection on the test lug show that both the chemical composition and the mechanical property fully met the requirement． The purpose of this paper is to provide valuable production experience for the stable production of the ductile iron casting with heavy section． Key words：heavy section as—cast ductile iron；casting process；ultra