有哪些信誉好的足球投注网站- 1、本文档共5页，可阅读全部内容。
- 2、有哪些信誉好的足球投注网站（book118）网站文档一经付费（服务费），不意味着购买了该文档的版权，仅供个人/单位学习、研究之用，不得用于商业用途，未经授权，严禁复制、发行、汇编、翻译或者网络传播等，侵权必究。
- 3、本站所有内容均由合作方或网友上传，本站不对文档的完整性、权威性及其观点立场正确性做任何保证或承诺！文档内容仅供研究参考，付费前请自行鉴别。如您付费，意味着您自己接受本站规则且自行承担风险，本站不退款、不进行额外附加服务；查看《如何避免下载的几个坑》。如果您已付费下载过本站文档，您可以点击 这里二次下载。
- 4、如文档侵犯商业秘密、侵犯著作权、侵犯人身权等，请点击“版权申诉”（推荐），也可以打举报电话：400-050-0827(电话支持时间：9:00-18:30)。
查看更多
差压铸造薄壁铝硅合金铸件的位置效应-材料工程
18 / 2005 3
Sit e Effect iveness of T hin-w all A luminum- silicon A lloy
Cast ings in Different ial Pr essure C ast ing Pr ocess
, , ,
( , 150001
WA N G H ong-w ei, WEI Zun-jie, ZH U Zhao-jun, ZEN G Song-yan
( Scho ol o f Mat erials Science and Eng ineer ing,
H arbin Instit ute of T echnolo gy, H arbin 15000 1, China
: ,
SiC , , ; ;
,
, , , ; ,
,
, ,
: ; ; ;
: T G 14 62; T G249 : A : 1001- 438 1( 2005 0 3- 0018- 04
Abstract: Diff erent sit e micr ost ruct ure and mechanical propert ies of aluminum- silicon alloy in dif f eren-
t ial pressure casting process w ere invest igat ed. T he g at e sy st em w as adopt ed vert ical slit t ing gat e sys-
t em. In t he invest igat ion at t he inner- gat e sit e o f the cast ing s the g rain is finer , the densit y is higher
and t he mechanical pro pert ies is best than t hat o f at the coo ling site of castings no matt er w ith SiO2
sand m ould, SiC sand mould or chill. H ow ever, t he g rain size, densit y and m echanical propert ies of
cast ings betw een inner- gat e sit e and coo ling site are m inimum. T he analysis results reveal t hat solidif-i
cation pressur e has sit e ef fect iveness during pro ducing alum inum alloy cast ing s by using vertical slit-
t ing gat e syst em w it h a diff er ent ial pressure cast ing process. A t t he inner- g at e sit e t he m olt en met al
has higher t emperat ur e and longer so lidificat ion t ime t hat make so l
文档评论（0）