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Factors affecting pump valve process

Release time:

2022-03-04 09:51

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There are many solidification methods for castings. During the solidification process of castings, their cross-section is generally divided into three zones: 1- Solid phase zone 2- Solidification zone 3- Liquid phase zone. The width of the solidification zone has a significant impact on the solidification process, and the solidification mode is divided accordingly. Firstly, intermediate solidification: The solidification of most alloys falls between layer by layer solidification and paste solidification. Secondly, layer by layer solidification: Pure metals and eutectic alloys do not have a solidification zone during the solidification process. The liquid and solid phases on the cross-section are clearly separated by a boundary. As the temperature decreases, the solid phase layer continuously increases and the liquid phase layer continuously decreases, reaching the center. Thirdly, paste solidification: The alloy has a wide range of crystallization temperatures. During a certain period of solidification, there is no solid layer on the surface of the casting, and the solidification zone runs through the entire cross-section, first becoming paste and then solidifying. According to relevant experts, the factors affecting the solidification mode of castings can be summarized as follows: firstly, the temperature gradient of the castings. When the temperature range of alloy crystallization is constant, the width of the solidification zone depends on the temperature gradient of the inner and outer layers of the casting. The smaller the temperature gradient, the wider the solidification zone. (Large temperature difference between inside and outside, fast cooling, narrow solidification zone). Secondly, the crystallization temperature range of the alloy. Small range: The solidification zone is narrow and tends to solidify layer by layer. For example, sand casting, layer by layer solidification of low carbon steel, and paste solidification of high carbon steel.
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Taizhou Baiguan Pump Valve Technology Co., Ltd.

Taizhou Baiguan Pump Valve Technology Co., Ltd. is a large valve manufacturing enterprise integrating valve casting, development and design, production, sales and service.

Baiguan Valve Technology

Address: No.1, Xiangfu East Street, Hongqiao Industrial Park, Taixing City, Jiangsu Province

Tank Valves:

Phone: Manager Zhang18652667299Miss Yang18082359748

Mailbox:zhangyinglei@bgjx.cn   web@bgjx.cn

Q:331528527

petrochemical valve:

Telephone: Manager Wang18151159988Manager Zhang18083701188   

Mailbox:Valve@bgjx.cn

Q Q:736279719

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