Lead-free environment-friendly bismuth bronze water meter shell and alloy preparation method
A water watch case and bismuth bronze technology, which is applied in the field of lead-free and environmentally friendly bismuth bronze alloy materials, can solve problems affecting application and casting performance degradation, and achieve the effects of improved fluidity, excellent casting performance, guaranteed quality and yield
Inactive Publication Date: 2018-01-30
浙江中瀚智能控制股份有限公司
View PDF5 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
However, the above-mentioned bronze-based low-lead alloys ensure high-temperature tensile properties, and when they are used in casting, especially gravity casting, many casting defects will appear, and the casting performance of lead-containing bronze is greatly reduced, which affects its application in the metal forming industry.
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0028] The present invention is further described below with specific embodiment: the preparation method of alloy in the lead-free environmental protection bismuth bronze water watch case is as follows:
[0029] Copper+tin+charcoal→melting→adding copper-bismuth alloy→stirring→zinc, stirring evenly→P-Cu→refining→sampling, pre-furnace analysis, composition adjustment→slagging, standing→out of the furnace and pouring,
[0030] The first step is to preheat the power frequency induction furnace, select cathode copper, electrolytic tin, and feed into the power frequency induction furnace;
[0031] The second step is to gradually heat the power frequency induction furnace to melt the raw materials;
[0032] The third step is to add copper-bismuth master alloy;
[0033] The fourth step is to add zinc after fully stirring to make the alloy melt mix evenly;
[0034] The fifth step is to add refining agent and stir again;
[0035] The sixth step is to sample and analyze the alloy melt...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
| Property | Measurement | Unit |
|---|---|---|
| melting point | aaaaa | aaaaa |
Login to View More
Abstract
The invention discloses a lead-free environment-friendly bismuth bronze water meter shell and an alloy preparation method, and belongs to the technical field of alloy materials. Chemical elements of alloy materials comprise, in weight percent, less than or equal to 0.2% of lead, less than or equal to 0.1% of aluminum, less than or equal to 0.20% of iron, 5.0%-8.0% of zinc, 4.0%-6.0% of tin, 0.8%-3.0% of bismuth, less than or equal to 0.6% of nickel, less than or equal to 0.05% of phosphorus, less than or equal to 0.1% of silicon, less than or equal to 0.25% of arsenic and the balance copper and unavoidable impurities. An alloy has excellent castability, corrosion resistance and subsequent machining performance and is particularly applicable to castings, valves and the like of a water supply system, and the alloy is a metal material facilitating human health and environmental protection.
Description
technical field [0001] The invention relates to a bronze alloy, in particular to a lead-free and environmentally friendly bismuth bronze alloy material which is easy to cut and has excellent casting performance, corrosion resistance and subsequent machining performance. They are especially suitable for water supply system castings, valves, etc. They are metal materials that are beneficial to human health and environmental protection, and are also excellent substitutes for lead brass and lead-containing bronze that are widely used at present and cause adverse effects on human body and environment. . Background technique [0002] Casting bronze is easy to manufacture castings with complex shapes. Bronze castings have good corrosion resistance, pressure resistance and wear resistance, and some of them are used for water supply system castings and valve parts. Cast tin bronze has excellent corrosion resistance, especially in the atmosphere, fresh water, sea water, alkaline solu...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More Patent Type & Authority Applications(China)
IPC IPC(8): C22C9/02C22C9/04C22C1/03C22C1/06G01F15/14
Inventor 蒋明川
Owner 浙江中瀚智能控制股份有限公司