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保定宏晟隆精密鑄造有限公司
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當前位置:不銹鋼鑄造在金屬型中冷卻凝固得比砂型中快
[來源:www.voipblast.net] [作者:精密鑄造] [日期:17-01-17]
由于不銹鋼鑄造在金屬型中冷卻凝固得比砂型中快,金屬型又無容讓性,因此在金屬型鑄造時,鑄件中產生的鑄造應力比砂型鑄件要大裂紋傾向性也大,還容易產生澆不足、冷隔、白口(對于鑄鑄件)等缺陷。通常: Because the stainless steel casting in metal mold cooling solidification faster than in the sand mold, metal mold nor let sex, so when the metal mold casting, casting of casting stress is bigger than the sand mold casting crack orientation also big, also easy to produce misrun and cold shut, white (for casting casting), and other defects. Usually:   (1)在防止不銹鋼鑄造產生澆不足、冷隔等方面應注意以下結構問題:A、鑄件的外形應盡量具有流線形避免尖棱角與急劇變化的連接等結構形狀,以利于金屬液的流動;B、鑄件壁厚要適當不能過薄,特別是當鑄件輪廓尺寸較大時更不能過薄; C、應避免大的水平面,因為它使得鑄件在澆注時,金屬液上升得很慢,與空氣接觸的面大,易氧化,同時由于金屬型散熱快,金屬液很快失去流動性,易造成澆不足、冷隔、夾渣等缺陷; (1) in preventing the stainless steel casting misrun and cold shut etc should be paid attention to the following structure: A, the appearance of the casting should have streamlined as far as possible to avoid sharp edges and abrupt change in structure shape and so on, to facilitate the flow of liquid metal. B, casting wall thickness to appropriate can't too thin, especially when casting contour size larger more cannot too thin; C, should avoid large horizontal plane, because it makes the casting on the casting, metal rise slowly, with the air contact surface is big, easy oxidation, at the same time due to the metal mold heat faster, metal soon lose liquidity, easy to cause defects such as misrun and cold shut, slag;   (2)在防止不銹鋼鑄造產生裂紋方面應注意以下結構問題: A對于結構上比較薄弱的部分應設肋、凸臺等予以加強,以防鑄造裂紋; B、在鑄件上布置加強肋時,還應考慮到它對鑄件收縮的影響;C、應盡量減少有阻礙鑄件自由收縮的凸臺、肋、凸緣等突出部分; D、在壁厚均勻、壁間過渡與連接要緩和、較角處圓角適當等各方面的要求應比砂型鑄造鑄件更嚴格一些; E、應將垂直相連的壁改為傾斜相連。 (2) to prevent the stainless steel casting crack problems should be paid attention to the following structure: A relatively weak part of the rib should be set up for structure, convex platform, such as strengthening, in case the casting crack; B, decorate a stiffening rib on the casting, also should consider to its influence on the casting shrinkage; C, should try to reduce the free shrinkage in casting, convex rib, flange and other prominent part; D, transition and connection between the uniform wall thickness, wall to ease, the more rounded appropriate Angle and so on various aspects of requirements should be more strict than that of sand mold casting casting; E, should be connected to the vertical wall connected to tilt.
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