关闭
返回顶部
联系方式
保定宏晟隆精密铸造有限公司
公司地址:保定南市区朱庄
电 话:0312-8928995
电 话:0312-2157611
手 机:13833227175
传 真:0312-2115599
网 址:www.
当前位置:不锈钢铸件铸造性能
[来源:www.] [作者:精密铸造] [日期:19-04-30]

不锈钢铸件铸造性能较差,流动性差,体收缩和线收缩较大,热应力大,容易产生裂纹。一旦铸件产生裂纹,不仅返修工作量大,严重的还可能报废,造成重大的经济损失。铸件裂纹的产生因素主要是铸件结构、铸造工艺等,生产中一般采用以下措施来加以预防: Stainless steel castings cast with poor performance, poor liquidity, volume shrinkage and linear shrinkage is larger, the thermal stress is big, easy to crack. Once the cracking formation of castings, the workload is big, not only repair serious may also scrapped, causing great economic losses. Casting cracks factors mainly casting structure, such as casting process, generally adopt the following measures to prevent in production: 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、熔炼 2, melting   熔炼过程中,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。 Smelting process, try to reduce the content of harmful elements such as P, S, lower N, H, O gas and inclusion content, etc. Through the adoption of low phosphorus steel intermediate alloy, can have very 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. 5、切割冒口 5, cutting riser   根据铸件条件选择适当的热割浇冒口工艺方式,保证热割起始温度不低于300℃。操作时,气割枪和吹氧管采用振动切割。重要件气割后及时用石棉布盖住隔口或进炉热处理。对于上冠及轴流式叶片一类结构复杂、工艺上采取特殊措施的铸件,采用二次热割。 According to casting condition choose proper thermal poured riser cutting process, ensure hot cut starting temperature is not lower than 300 ℃. Operation, gas cutting and blowing oxygen tube using vibration cutting. Important thing in a timely manner after gas cutting with asbestos cloth cover every mouth or into the furnace heat treatment. For the champions league and the axial flow blades on a class of complex structure, process take special measures of castings, adopting secondary hot cut. 6、预热 6, preheating   在对不锈钢铸件进行缺陷处理时,要坚持预热原则。在吹、焊工序处理时,工件要预热至108℃以上方可操作。若发现较大的裂纹缺陷,应先进行去应力退火,再进行处理。 In the processing of stainless steel castings defects, want to insist on the principle of preheating. When blowing process, welding process, the workpiece to preheat to 108 ℃ or more before operation. If discover the larger crack defects, should be conducted to stress relieving, again for processing. 7、退火 7, annealing   对重大不锈钢铸件须进行一次最终消除应力退火工序,严格控制保温时间和出炉温度。其目的是减少生产过程中产生新的应力集中,更加彻底地消除铸件内应力,防止裂纹产生。 To a major stainless steel castings shall eventually eliminate stress annealing process, strictly control the heat preservation time and melt temperature. Its purpose is to reduce the production process of new stress concentration, the more thoroughly eliminate the internal stress of castings, to prevent the crack.

版权所有保定宏晟隆精密铸造有限公司 网址:www. :遨游网络
电话:0312-8928995 传真:0312-2115599 地址:保定南市区朱庄 推荐:不锈钢铸件,精密铸造,精密铸件,不锈钢铸件价格,精密铸件加工厂家
友链: