| 精密铸件的合格标准与其为何要热处理 |
| 添加时间：2019/4/3 16:08:48 浏览次数： |
| 怎样才算是合格的精密铸件？ How is a qualified precision casting? 精密铸件的合格标准，是为：铸件表面没有粘砂氧化皮、飞边以及铸瘤等。如果在加工面上有表面缺陷的话，那么深度不能大于2mm。如果是在非加工面上的话，则深度不能超过1mm。此外，在其所有部位上，不能有线状缺陷和裂纹。满足上述这些条件，精密铸件才能算是合格的。 The qualified standard of precision castings is that there is no sand oxide scale, flash and cast tumors on the surface of castings. If there is a surface defect on the working surface, the depth should not be greater than 2 mm. If it is on a non-machined surface, the depth should not exceed 1 mm. In addition, there should be no linear defects and cracks in all parts of the structure. Only when these conditions are met can the precision casting be qualified. 2.精密铸件进行回火，是在热处理中吗？ 2. Is the tempering of precision castings in heat treatment? 精密铸件，其进行回火的话，一般是在热处理中的。其主要目的，是为了来改善铸件的一些性能，从而来提高其的使用性能和效果。因此，在材料选用和成形工艺的选择上，要做到合理，这样才行。 Precision castings are usually tempered in heat treatment. Its main purpose is to improve some properties of castings, thereby improving their performance and effect. Therefore, in the selection of materials and forming process, it is necessary to achieve reasonable, so as to do. 3.为何精密铸件可以是薄壁铸件？以及，其鼓包和漏铁水的原因是什么？ 3. Why can precision castings be thin-walled castings? And what are the reasons for the bulging and leaking of molten iron? 精密铸件，其可以是薄壁铸件的原因，是因为在精密铸造过程中，其模壳是高温预热的，而且浇注时，金属的凝固速度比较慢，所以，其可以是薄壁铸件。至于，精密铸件鼓包和漏铁水，在具体原因上，可能是铸件本身有问题，比如其模壳强度不够，或者是所使用的粘接剂有问题，从而导致了上述问题。 Precision castings, which may be the reason for thin-walled castings, because in the process of precision peidiandl.37ix.com.cntuoguntx.37ix.com.cntuliao.37ix.com.cn xingcai.37ix.com.cngaiban.37ix.com.cnrunhuaji.37ix.com.cncasting, the mold shell is preheated at high temperature, and the solidification speed of metal is relatively slow when pouring, so it can be thin-walled castings. As for the bulging and leaking of hot metal in precision castings, the specific reasons may be that the castings themselves have problems, for example, the strength of the shell is not enough, or the use of adhesives has problems, which lead to the above problems. |
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