A manufacturing process of grade A brass alloy ingot for gravity casting
A technology of gravity casting and alloy ingots, which is applied in the field of production technology of A-grade brass alloy ingots for gravity casting, can solve the problem of uneven technical capabilities of plumbing hardware manufacturers, lack of one raw material formula, affecting the processing and performance of brass castings and other problems, to achieve the effect of reasonable ingredients and production process, low cost and easy processing
Active Publication Date: 2016-03-02
鹤山市金益铜业有限公司
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Problems solved by technology
[0002] The production process of brass castings for plumbing hardware: brass ingot → casting → machining → polishing → electroplating; Experience requires formula, and the technical capabilities of plumbing hardware manufacturers are uneven. There is no general and feasible solution for raw material (brass ingot) formula, which directly affects the processing and performance of brass castings.
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[0028] The present invention is described in further detail below in conjunction with accompanying drawing:
[0029] A grade A brass alloy ingot specially used for gravity casting, containing copper Cu59.0-60.5wt%, lead Pb0.8-1.9wt%, aluminum Al0.5-0.7wt%, tin Sn0.05-0.2wt%, iron Fe0.05-0.15wt%, nickel Ni0.05-0.20wt%, boron B8-12PPM, bismuth Bi0.05wt%, zinc Zn balance and unavoidable impurities 0.1wt%.
[0030] like figure 1 Shown, a kind of manufacturing process of special grade A brass alloy ingot for gravity casting comprises the following steps:
[0031] a. With feeding:
[0032] Main ingredients: use 180kw power frequency electric furnace to melt copper; according to the batching of 1800kg of molten copper per furnace, the total weight of red copper, zinc, lead and aluminum is controlled at 50%, specifically: red copper 25%-30% (optimally 28%) , Zinc 18%-21% (optimally 19%), lead 0.5%-0.6% (optimally 0.55%), aluminum 0.5%-0.6% (optimally 0.55%), and the remaining 50% i...
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Abstract
The invention discloses a special Grade A brass alloy ingot for gravity casting, which is characterized by comprising 59.0-60.5wt% of Cu, 0.8-1.9wt% of Pb, 0.5-0.7wt% of Al, 0.05-0.2wt% of Sn, 0.05-0.15wt% of Fe, 0.05-0.20wt% of Ni, 8-12PPM of B, 0.05wt% of Bi, 0.1 wt% of inevitable impurity and the balance of Zn. The manufacturing technique comprises the following steps: a. proportioning; b. electric furnace melting; c. degassing and deslagging; d. assaying; e. material supplementation; f. refinement; g. inspection; h. standing; i. casting; and j. inspection and warehousing. Compared with the prior art, the Grade A brass ingot produced according to the formula and manufacturing technique is suitable for gravity casting of hot-water heating bathroom accessories, and has excellent casting, machining, polishing and electroplating properties; the proportioning and manufacturing technique is reasonable and low in cost; the lead content is 0.8-1.9%; and thus, the brass ingot has the advantages of high machinability and environmental protection.
Description
technical field [0001] The invention relates to a metal material manufacturing process, in particular to a manufacturing process of a grade A brass alloy ingot specially used for gravity casting. Background technique [0002] The production process of brass castings for plumbing hardware: brass ingot → casting → machining → polishing → electroplating; Experience requires formula, and the technical capabilities of plumbing hardware manufacturers are uneven. There is no general and feasible solution for raw material (brass ingot) formula, which directly affects the processing and performance of brass castings. Contents of the invention [0003] The present invention aims to solve the above-mentioned deficiencies, and provides a manufacturing process for a grade A brass alloy ingot specially used for gravity casting. [0004] The above object of the present invention is achieved by the following technical solutions: a grade A brass alloy ingot for gravity casting, comprising...
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IPC IPC(8): C22C9/04C22C1/02
Inventor 阮媛清
Owner 鹤山市金益铜业有限公司