Technique for processing tin bronze valve body and tube union

A processing technology, tin bronze technology, applied in the direction of metal processing equipment, manufacturing tools, metal extrusion control equipment, etc., can solve the performance, reliability, yield, material utilization and equipment capacity limitations of die-casting products, which cannot meet the requirements Requirements for high-performance structural parts, difficulty in obtaining compactness and other problems, to achieve the effect of solving air-tightness problems, improving ductility and reducing production costs

Inactive Publication Date: 2008-04-02
王仁辉
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AI Technical Summary

Problems solved by technology

[0004] Since tin bronze is difficult to obtain castings with good density under general conditions, especially under sand casting conditions, the problem of air tightness has become a bottleneck for tin bronze to further play a role in this field
[0005] At present, the main forming method of valve bodies and pipe

Method used

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  • Technique for processing tin bronze valve body and tube union

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Embodiment Construction

[0020] As shown in Figure 1, the processing technology of high-strength and high-ductility magnesium alloy parts sequentially includes three steps of tin bronze modification treatment 1, extrusion forging billet 2, and forging 3.

[0021] The copper is used as the raw material and the alloy composition is proportioned for batching. When the alloy is smelted, the raw material is first added to the furnace, and then the calcined charcoal is added as a protective agent to isolate the alloy from the air. Among them, the thickness of the charcoal covering layer is 50-70mm. Then heat the alloy material to 600°C, keep it in the furnace for 30 minutes, then continue to heat up to 900°C, and finally heat the alloy to 1150°C, remove the slag and charcoal on the liquid surface, and add about 0.1% phosphor copper, Stir the molten pool with a graphite rod, add charcoal to raise the temperature to 1200°C, keep it warm for 30 minutes, and prepare for continuous casting.

[0022] When the fu...

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Abstract

The present invention discloses a processing technique of a tin bronze valve body and a pipe joint which comprises a modification processing of tin bronze, extruding and forging of the unburnt earthenware, forging and so on. The tin bronze is metamorphosed and modified by the present invention by adding rare earth to purify and RE-Li-Bi alloy composite modifier to refine the crystal grain and improves the scalability of bronze and addresses the tin bronze sealing problem. The forging of an unburnt earthenware piece is a technique which is light and fast at the beginning, heavy and slow in the middle and is formed by tapping in the brittle region. The processes of forging the original unburnt earthenware, extruding the unburnt earthenware, forging the tin bronze valve body and producing a pipe joint are integrated; the work which needed a plurality of months at the beginning is capable of being integrated and finished in a production cycle, so the processing accuracy is increased; the process is simplified; the production efficiency is improved and the production cost is reduced. The present invention is mainly used for the bronze valve which is provided with the dimension of 3/8 inches to 4 inches and the series components for forging the pipe joint.

Description

【Technical field】 [0001] The invention relates to a tin-bronze alloy piece, in particular to the processing technology of a tin-bronze valve body and a pipe joint. 【Background technique】 [0002] Among copper alloys, only brass is suitable for die-casting, mainly because brass has a low melting point and the crystallization interval of the alloy is small, which is beneficial to overcome the solidification stress caused by rapid cooling. In addition, the price of zinc is much lower than that of Cu and Al, and the supply is abundant. , so the cost is low. The solid solubility of Zn in copper is also large, which is beneficial to the improvement of strength and hardness. Die-casting copper alloys are generally used to make high-temperature strength, corrosion-resistant and wear-resistant components, such as water pipe joints, automobile shift forks, signs, door locks, furniture accessories, fire sprinklers, etc., among which YZCuZn is the domestic 16 Si 4 Die-casting brass i...

Claims

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Application Information

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IPC IPC(8): B23P15/00B21C31/00B21C23/00B21J5/00C22C1/02C22C1/06C22C9/02C22F1/08B22D11/114
Inventor 王仁辉
Owner 王仁辉
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