| 不锈钢铸件裂纹 预防措施四方面 |
| 添加时间：2017/5/17 15:31:53 浏览次数： |
| 1、铸件结构 1, the structure of the casting 铸造时要全面考虑铸件的结构、形状、大型、壁厚及其过渡等影响铸件液态和固态收缩的因素，选择适当的工艺参数，防止缩孔缩松等铸造缺陷。铸件的浇冒口系统设计要合理，若要采用冷铁等工艺措施，其安放的部位要合理，既要保证铸件内部组织的致密性，又要尽量避免应力集中的情况产生。 Should fully consider when casting casting structure, shape, large, wall thickness and transition effects such as factors of liquid and solid state contraction of castings, select the appropriate process parameters, to prevent the shrinkage cavity casting defects such as shrinkage. Castings poured riser system design is reasonable, if you want to use cold iron process measures, such as the site of setting to reasonable, both to ensure the density of the casting internal organization, and try to avoid stress concentration occurs. 2、冶炼 2, smelting, 冶炼过程中，尽量降低P、S等有害元素的含量，降低N、H、O等气体和夹杂物含量。通过采用低磷钢中间合金，可以起到很好的效果。 In the process of smelting, the content of the harmful elements such as P and S is minimized, and the contents of the gas and inclusions of N, H and O are reduced. By using the alloy of low phosphor steel, it can have a good effect. 3、保温 3, heat preservation 通过适当延长铸件在砂型中的保温时间，主要是控制开箱温度低于70℃，保证铸件在砂型中充分完成液态和固态收缩，避免外力因素造成应力集中的情况发生。 Through appropriate to extend the time of castings in sand mold, heat preservation, mainly control box temperature below 70 ℃, ensure full completion of liquid and solid in the sand mould castings contraction, avoid stress concentration caused by external force factors. 4、落砂 4, shakeout 在铸件落砂清理过程中，严禁打箱时向砂型和铸件浇水，严禁采用撞箱等较强外力冲击方式落砂，避免外力和铸件内应力相互作用产生裂纹。 In the process of casting sand cleaning, do not play the box when watering the sand mould and casting, it is forbidden to use the strong external forces such as hit box shakeout impact way, avoid interaction force and the internal stress of the casting crack. |
| 上一页 脱蜡铸造法的分类 |
| 下一页 球阀发展演变与工作原理 |
Copyright © 技术支持：遨游网络