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预防压铸beplay全站app安卓的缺陷的细节介绍

来源:http://www.jnhjgs.cn     发布时间:2020-04-29 16:05:00    点击:

1、铸件气孔
1. Casting porosity
气孔是存在于铸件表面或内部的孔洞,呈圆形、椭圆形或不规则形,有时多个气孔组成一个气团,皮下一般呈梨形。
Porosity is a kind of hole on the surface or inside of the casting, which is round, elliptical or irregular. Sometimes, multiple pores form an air mass, and the subcutaneous is generally pear shaped.
2、铸件缩孔
2. Casting shrinkage
缩孔是铸件表面或内部存在的一种表面粗糙的孔,轻微缩孔是许多分散的小缩孔,即缩松,缩孔或缩松处晶粒粗大。
Shrinkage cavity is a kind of rough surface hole on the surface or inside of the casting. A slight shrinkage cavity is a lot of scattered small shrinkage cavities, i.e. shrinkage cavity, where the grain is coarse.
3、铸件夹渣
3. Casting slag inclusion
渣孔是铸件上的明孔或暗孔,孔中全部或局部被熔渣所填塞,外形不规则,小点状熔剂夹渣不易发现,将渣去除后,呈现光滑的孔,一般分布在浇注位置下部,内浇道附近或铸件死角处,氧化物夹渣多以网状分布在内浇道附近的铸件表面,有时呈薄片状,或带有皱纹的不规则云彩状,或形成片状夹层,或以团絮状存在铸件内部,折断时往往从夹层处断裂,氧化物在其中,是铸件形成裂纹的根源之一。
山东铝合金压铸
Slag hole is the open hole or dark hole on the casting. It is filled with slag completely or partially. Its shape is irregular. It is not easy to find small point flux slag inclusion. After the slag is removed, it presents smooth holes, which are generally distributed in the lower part of the pouring position, near the inner sprue or the dead corner of the casting. Oxide slag inclusions are mostly distributed on the casting surface near the inner sprue in a network, sometimes in a sheet shape or with wrinkles The irregular cloud like pattern, or the formation of lamellar interlayer, or the existence of the inner part of the casting in the form of floccules, often breaks from the interlayer when breaking, in which oxide is one of the causes of the formation of cracks in the casting.
4、铸件有裂纹
4. Cracks in casting
裂纹的外观是直线或不规则的曲线,热裂纹断口表面被强烈氧化呈暗灰色或黑色,无金属光泽,冷裂纹断口表面清洁,有金属光泽。一般铸件的外裂直接可以看见,而内裂则需借助其他方法才可以看到。裂纹常常与缩松、夹渣等缺陷有联系,多发生在铸件尖角内侧,厚薄断面交接处,浇冒口与铸件连接的热节区。
The appearance of the crack is straight or irregular curve. The hot crack fracture surface is strongly oxidized to dark gray or black, without metallic luster. The cold crack fracture surface is clean and has metallic luster. Generally, the external crack of castings can be seen directly, while the internal crack can only be seen by other methods. Cracks are often associated with shrinkage porosity, slag inclusion and other defects, most of which occur in the inner side of the sharp corner of the casting, the junction of thick and thin sections, and the hot spot area where the pouring riser is connected with the casting.
5、砂眼
5. Trachoma
在铸件表面或内部形成相对规则的孔洞,其形状与砂粒的外形一致,刚出模时可见铸件表面镶嵌的砂粒,可从中掏出砂粒,多个砂眼同时存在时,铸件表面呈桔子皮状。
A relatively regular hole is formed on the surface or inside of the casting, and its shape is consistent with the shape of the sand particles. When the casting is just out of the mold, the sand particles inlaid on the surface of the casting can be taken out. When multiple sand holes exist at the same time, the surface of the casting is orange peel.
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