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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:不銹鋼鑄件:不銹鋼鑄造的基本結構單元
[來源:www.voipblast.net] [作者:精密鑄造] [日期:17-01-17]
在設計不銹鋼鑄造的基本結構單元及其參數選定時,通常還應注意:(1)為防止灰鑄鐵件產生白口,除從工藝上采取措施外,必須使其壁厚不能過薄(有些資料指出,壁厚在15mm以上時,用金屬型鑄造鑄件的轉角處都必須采用圓角,對于鋁合金、鎂合金金屬型鑄造鑄件的鑄造圓角不應小于3-4m,對于鑄鐵、鑄鋼、銅合金金屬型鑄造件的鑄造圓角可參見表1.1-32選取;(2)由于金屬型和芯無讓性,為便于取出鑄件和抽出型,金屬型鑄造鑄件的鑄造斜度應比砂型鑄造件的適當大一些,一般應大30%-50%,應該指出:鑄造斜度大小除與合金種類、壁的高度有關外,還與鑄件表面的位置有關,凡在鑄件冷卻收縮時與金屬型表面有脫離傾向的鑄件表面可設計較小的斜度,而在鑄件收縮時趨向于壓緊在金屬型上的鑄件表面應給予較大的斜度,各種合金的不銹鋼鑄造的鑄造斜度;(3)由于金屬型散熱快,因此不銹鋼鑄造的最小壁厚應比砂型鑄造鑄件的要大一些,各種鑄造合金、不同大小的鑄造最小壁厚;(4)鑄件內壁和內肋的厚度一般應取相連外壁厚度的0.6-0.7,否則由于內壁(肋)冷得慢,在鑄件收縮時易在內外壁交接處產生裂紋。 In the design of basic structure unit of stainless steel casting and its parameters are selected, usually also should pay attention to: (1) to prevent grey cast iron parts produced white, in addition to take measures from the process, must make its wall thickness too thin, some data points out that when more than 15 mm wall thickness, the corner with a metal mold casting castings are rounded corners, must be used for aluminum alloy, magnesium alloy metal mold casting casting foundry rounded corners should not be less than 3 to 4 m, for cast iron, cast steel, copper alloy metal mold casting pieces of casting round corner can see table 1.1-32 selection; (2) as there is no sex metal mold and core, and drew out for ease of casting, metal mold casting casting foundry slope should be the appropriate larger than that of sand mold casting, generally have thrown 30% 50%, it should be pointed out: casting Angle size except associated with types of alloy, the height of the wall, also related to the position of the casting surface, and in the casting cooling contraction with has a tendency to leave the surface of the metal mold casting surface can be smaller slope design, and when the casting contraction tends to pressure on the metal mold casting surface should be given a larger gradients, various kinds of alloy stainless steel casting foundry slope; (3) due to the metal mold heat faster, so the stainless steel casting, the minimum wall thickness should be larger than sand mold cast castings, all kinds of casting alloy, different sizes of casting the minimum wall thickness; (4) casting wall and connected to the thickness of the rib in general should take the outer wall thickness of 0.6-0.7, otherwise due to the cold wall (rib) slowly, when casting shrinkage crack in internal and external wall of the junction.
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