发布时间 : 星期六 文章球墨铸铁连杆铸造工艺设计更新完毕开始阅读
攀枝花学院
Panzhihua University 铸造工艺课程设计说明书
设计题目：球墨铸铁连杆铸造工艺设计 姓名：xxxxx 院系：材料工程学院 专业：材料成型及控制工程 学号：xxxxxxx 指导老师：xxx 时间：xxxxx
攀枝花学院本科课程设计 摘 要
摘 要
首先，根据提供的零件图获取零件的技术要求、材料组成、结构特点、生产条件、生产批量及性能要求。然后，对零件结构的铸造工艺性进行分析，找出可能存在的结构问题提出改进措施或者预防缺陷的措施：根据零件的结构特点、技术要求、生产批量、生产条件选择铸造和造型方法。由零件的结构特点提出多种浇注和分型方案，综合对比分析，选择最为理想的浇注位置及分型面。再次根据铸造工艺方案和零件的特点，选用适宜的工艺参数，设计铸件的浇注系统并绘制铸造工艺图。
关键词：球墨铸铁，铸造工艺，浇注系统，工艺参数
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攀枝花学院本科课程设计 目 录
目 录
摘 要·······································································Ⅰ
第1章 绪论································································1
1.1课程设计的意义·························································1 1.2设计题目的提出·························································1
第2章 材料的确定·························································3 第3章 结构工艺分析······················································ 4 第4章 工艺方案的设计····················································5
4.1铸型种类及方法确定·····················································5 4.2型芯结构及制造·························································5 4.3分型面的筛选···························································6 4.4铸造位置及浇注口的确定·················································6
第5章 铸件工艺参数确定···················································7
5.1加工余量·······························································7 5.2起模斜度及圆角确定·····················································8 5.3收缩量选择·····························································8 5.4型芯及型芯头选择······················································8
第6章 浇注系统的拟定···················································10
6.1系统作用与结构分析····················································10 6.2横浇道及其结构························································10 6.3各组元截面尺寸确定····················································10 6.4 系统引注位置的选用····················································12 6.5冒口及尺寸确定························································12
附录········································································14 总结········································································16 致谢········································································17 参考文献···································································20
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攀枝花学院本科课程设计 第1章 绪 论
第1章 绪 论
球墨铸铁是指用球化剂和孕育剂处理铁液后，石墨呈球状的铸铁。 1.1球墨铸铁的发展历史
在河南巩县铁生沟西汉中、晚期的冶铁遗址中出土的铁镐，经过金相检验，
具有放射状的球状石墨，球化率相当于现代标准的一级水平。而现在的球墨铸铁则是迟到至1947年才在国外研制成功。我国古代的铸铁，在相当长的时期里含硅量都偏低，也就是说，在约2000年前的西汉时期，我国球状石墨，就已由低硅的生铁铸件柔化退火的方法得到。这是我国古代铸铁技术的重大成就，这也是世界冶金史上的奇迹。
国际冶金行业过去一直认为球墨铸铁是英国人于1947年发明的。西方某学者甚至声称，没有现代科技手段，生产球墨铸铁是不可想象的。1981年，我国球铁专家采用现代科学手段，对出土的513件古汉魏铁器进行研究，通过大量数据断定汉代我国就出现了球状石墨铸铁。有论文在第18届世界科技史大会上宣读，轰动了国际铸造界。国际冶金专家于1987年对此进行验证后认为:古代中国已经摸索到用铸铁柔化制造球墨铸铁的规律，这对世界冶金史重新分期划代具有重要意义。
球墨铸铁作为新型工程材料的发展速度是令人惊异的。1949年世界球墨铸铁只有5万吨，1960年为53.5万吨，1970年增长到500万吨，1980为760万吨。1990年达到900万吨。2000年达到1500万吨。球墨铸铁是生产发展在工业发达国家特别快。世界球墨铸铁产量的75%是有美国、日本、意大利、英国、法国六国生产的。
我国球墨铸铁生产起步很早。1950年就研制成功并投入生产，至今我国球墨铸铁达230万吨，位于美国、日本之后，位于世界第三位。适合我国国情的稀土煤球划剂的研制成功，铸态球墨铸铁以及奥氏体—贝氏体球墨铸铁等各个领域的生产技术和研究工作均达到了很高的技术水平。
1.2球墨铸铁的力学性能在强度和属性方面均具有优越性
（1）与灰铸铁相比，灰铸铁的力学性能仅以抗拉强度作为性能指标;并且，
其最高牌号的抗拉强度只有300Mpa：而球墨铸铁的最低抗拉强度是400Mpa，并且还有10%以上的断后延伸率。
（2）与可锻铸铁相比，无论是黑心可锻铸铁、珠光体可锻铸铁还是白心可锻
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