天然粘土砂烧结对铸铁件表面质量的影响  

Influence of Sintering Behavior of Natural Clay Sand on Surface Quality of Iron Castings

作　　者：杨振刚[1] 朱世根[1] 骆祎岚[1] 袁怀鹏[1] 宗倩[1] 朱君生 金啸海 

机构地区：[1]东华大学机械学院,上海201620 [2]浙江云和金旺机械制造有限公司,丽水323000

出　　处：《机械工程学报》2010年第12期65-69,共5页Journal of Mechanical Engineering

基　　金：浙江省重大科技专项资助项目(2008c01010-2)

摘　　要：天然粘土砂的烧结是影响铸铁件表面质量的重要因素,不烧结或过度烧结都可能引起粘砂缺陷,降低铸件表面质量。在对1#、2#黄壤土与矿渣多种比例混制的试样进行烧结试验的基础上,再在各组试样中添加适量铁的氧化物进行烧结试验。结果表明,天然粘土砂的烧结壳是由黄壤土、矿渣和铁的氧化物共同作用而成;矿渣对烧结有促进作用,矿渣越多烧结程度越严重;1#黄壤土型砂比2#黄壤土型砂烧结速度快。结合烧结试验结果,将2#、1#黄壤土、矿渣以4:2:4、3:3:4配制的型砂运用在惯性轮的生产中,解决惯性轮辐条处的粘砂问题。研究工作说明,天然粘土砂中的各种组分对其烧结状态具有重要的影响,依据不同壁厚铸件对铸型的热状态的影响,通过调配天然粘土砂的成分,使其产生适度烧结,可获得表面质量高的铸件。The surface quality of iron castings is influenced by the sintering behavior of natural clay sand.The components of natural clay sand are allocated and controlled according to the different thickness of castings with the purpose of achieving the appropriate sintering behavior and smooth-surface products.A series of sintering experiments are carried out with different weight ratios of clay 1#,2# and slag.Furthermore,the ferrite oxide is selected as an additive in the experiments.As a result,the sintering process is influenced a lot by the slag amount.The sintering speed of 1# is faster than that of 2#.On the basis of experiments,the molding sand composed of 2#,1# and slag with mixing ratios of 4：2：4 and 3：3：4 can be implemented in the production of inertia wheel,and the adherent sand defect at the spoke of the inertia wheel is solved by these molding sand.

关 键 词：天然粘土砂 烧结 粘砂 

分 类 号：TG221[金属学及工艺—铸造]