CN107604206A - A kind of leadless environment-friendly silizin shell of water flowmeter and alloy preparation method - Google Patents
A kind of leadless environment-friendly silizin shell of water flowmeter and alloy preparation method Download PDFInfo
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- CN107604206A CN107604206A CN201710697950.8A CN201710697950A CN107604206A CN 107604206 A CN107604206 A CN 107604206A CN 201710697950 A CN201710697950 A CN 201710697950A CN 107604206 A CN107604206 A CN 107604206A
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Abstract
The present invention refers in particular to a kind of leadless environment-friendly silizin shell of water flowmeter and alloy preparation method, belongs to technical field of alloy material, the following element of chemical composition (mass percent) of the alloy material：Copper：72%~80%；Silicon：0.7%~3.0%；Aluminium≤0.2%；Lead≤0.15%；Iron≤0.3%；Tin≤0.3%；Nickel≤0.5%；Surplus is zinc and inevitable impurity.Alloy material in the present invention has excellent casting character, decay resistance, follow-up machinability, Cutting free.Especially suitable for water system casting, valve member etc., the metal material of human health and environmental protection is advantageous for, and the meeting being widely used at present causes the excellent substitute for the ledrite for having baneful influence to human body and environment.
Description
Technical field
The present invention relates to a kind of lead-free brass alloys, more particularly to one kind to have excellent casting character, corrosion resistance
Energy, the lead-free free-cutting environmental protection silicon brass alloy material of follow-up machinability.They are especially suitable for water system casting, valve
Part etc., the metal material of human health and environmental protection is advantageous for, and the meeting being widely used at present causes to human body and ring
There is the excellent substitute of the ledrite of baneful influence in border.
Background technology
Ledrite has excellent mechanical performance and physical property and good casting character and cutting ability, and price
It is cheap, thus it is widely used in instrument and meter, electronics, electrical equipment, haberdashery and hardware, potable water system etc., wherein especially with Hpb59-1's
Production, application amount are maximum.
But lead and its compound are one of 17 kinds of chemical substances for seriously endangering human longevity and natural environment, in alloy
Lead easily invade out or deviate from from matrix in use, the lead in industrial waste gas product then permeates the ground water system, various
The lead of form enters animal or the food chain of people by all means, endangers human health, influences environment.Countries in the world in recent years
Medical expert have found that copper alloy containing lead constitutes threat, European Union, the U.S., Japan, China to human health and environmental sanitation
The report that copper alloy containing lead damages to human environment has been made that etc. medical facility.In view of lead is to human health environment
Harmfulness, the U.S., Japan, EU countries have put into effect in succession to be ordered within a certain time the government of copper alloy containing lead application, and Chinese Government also puts into effect
Liao Yu orders within a certain time the world consistent《Electronics and IT products prevention and cure of pollution management method》Etc. the mandatory rules of law, to the lead in copper alloy
Content (content of wherein electronics and IT products lead is necessarily less than 0.1%) and (Japan must be small in the leaching content of Pb in Drinking Water
In 0.01mg/L, the U.S. is necessarily less than and 0.0011%) has made ordering within a certain time for strict control respectively, and will constantly reduce lead therein
Content, the application of copper alloy containing lead, which is faced with, strictly to limit and challenges, and prospect will be more and more severe, therefore develops nothing
Ledrite and the ledrite of the purposes such as the tap in drinking-water system, water meter is substituted and leaded bronze becomes and worked as without Allen's metal
The key subjects that modern metal material industry is faced, also it is in response to the important process of world's recycling economy (EHS plans) requirement.
For the above situation, LEAD-FREE BRASS ALLOY is developed in the prior art.The lead-free reflow being related in the prior art closes
Gold, which mainly has in the Chinese patent application 200410004292.2,200410004293.7 of German company, individually discloses one kind
《Pb-free copper-alloy and its application》, it is related to the Pb-free copper-alloy based on copper-zinc-tin, its component is mainly including 60% to 70%
Copper, 0.5 to 3.5% tin and other caking property elements：0.01% to 0.5% iron and/or cobalt, 0.01% to 0.5% nickel,
0.01 to 0.5% manganese and/or silicon, surplus are zinc and inevitable impurity.Up to 3% is also optionally added in addition
Magnesium, up to 0.2% phosphorus and up to 0.5% silver, aluminium, arsenic, antimony, titanium, zirconium.Such Pb-free copper-alloy is mainly applied
In contact, pin and tightening member in electrotechnics and the communication technology.It may be also used in transport or storage liquid or gas
Container, the particularly container in Refrigeration Technique or the pipeline in sanitary engineering, water fitting, leading extension tube, pipe
Connector and valve.Above-mentioned alloy material has taken into account all multipurposes as plastic metal, rolled alloy or casting alloy, but makes
Into the real drawback during practical application.Such as because mobility is bad in casting process, if applying among gravitational casting,
Crackle occurs, pours less than more casting flaws such as, shrinkage cavities, causes casting yield to decline, influences to cast cost and casting
Application as expensive goods.
The content of the invention
It is an object of the invention to overcome deficiencies of the prior art, there is provided a kind of suitable leadless environment-friendly silizin
Alloy material and the method for preparing the alloy.Contained using the leadless environment-friendly silicon brass alloy material of the present invention with reaching reduction lead
Amount, meets the requirement of environment protection health, while it is possessed excellent casting character, particularly meets large-scale gravitational casting
Performance requirement.
The object of the present invention is achieved like this：A kind of leadless environment-friendly silizin shell of water flowmeter, the alloy that the shell of water flowmeter uses
The chemical composition of material is as follows：
Surplus is zinc and inevitable impurity.
Further optimization, the chemical composition of the alloy material are as follows：
Surplus is zinc and inevitable impurity.
Further optimization, the copper is cathode copper.
Further optimize, inevitably impurity content is no more than 0.8% in alloy.
The method for preparing above-mentioned alloy, comprises the following steps：
The first step, power frequency induction furnace is preheated, from tough cathode and charcoal, is fed into power frequency induction furnace, covers charcoal
In on tough cathode；
Second step, power frequency induction furnace is progressively heated, melt tough cathode；
3rd step, copper silicon intermediate alloy is added, the wherein mass percent of silicon is 10~20%；
4th step, fusing be sufficiently stirred plus No. zero zinc, is sufficiently stirred so that alloy molten solution is well mixed；
5th step, add refining agent and stir；
6th step, in sampling analysis, composition adjustment after being sufficiently stirred, until meeting above-mentioned casting character requirement；
7th step, stand, drag for slag, 1000~1100 DEG C of insulations, voltage 210V, standing 20 minutes makes contamination precipitation or float
To purify alloy molten solution；
8th step, it is warming up to 1150~1160 DEG C of cast of coming out of the stove.
Further optimization：The mass percent of the refining agent of 5th step forms：5 parts of ammonium chloride, 5 parts of potassium sulfate,
10 parts of sodium chloride, 5 parts of sodium carbonate, 10 parts of borax, 20 parts of coke powder, 10 parts of ice crystal.
Nickel is matrix strengthening and prevents dezincification element, while suppresses crystal grain and grows up, increase alloy strength, plasticity and anti-corrosion
Property, while can also improve the ability of alloy stress corrosion resistant.Nickel content is less than 0.1%, it is difficult to meets the items of industrially needs
Performance requirement, nickel content is more than 0.3% can increase the manufacturing cost of alloy and reduce cutting ability again, therefore nickel content should control
0.1~0.3%.
Addition tin is to aid in tin to strengthen anti-dezincification, the performance that resistance to stress is split and improve thermo forming performance, is allowed to reach
To standard as defined in International Environmental Protection health and safety.Secondly in the brass add tin can with deoxidation, increase alloy mobility,
Improve the cutting ability and intensity of alloy.Tin be solution strengthening and suppress dezincification element, be advantageous to each phase be uniformly dispersed and
The formation of hardening constituent, be advantageous to the raising of intensity, wearability and cutting ability, it is particularly advantageous to anti dezincification character energy and thermoforming
The raising of performance.The content general control of tin is advisable 0.1~0.3%, too high to reduce cutting ability.
Silicon is added, first, for improving casting and welding mobility, the welding technological properties of the alloy is improved, particularly exists
Silicon can also suppress zinc evaporation in welding process and oxide is mingled with；Second, consistency and the pressure-resistant, anti-wear performance of enhancing alloy
And cutting ability, rather than the firmly crisp phases of γ for making alloy generate high silicon.General addition is 0.7-3.0%, when silicone content is small
Above-mentioned action effect unobvious when 0.7%；The brittle phases such as more iron suicide can be generated when silicone content is more than 3.0%, and
Strengthen alloy brittle failure, cutting resistance increase.
The present invention is prominent and beneficial compared with prior art to be had the technical effect that：Firstth, brass alloy material drop of the invention
Low lead content so that its lead content is less than 0.1%, meets Compulsory Feature of the country to lead content, due to the silicon of the present invention
Brass alloys are mainly used in the first-class sanitary equipment industry of the fire hose, big to Health Impact, then in its alloy lead element content
It is significantly less than the content standard of traditional brass alloys.
Secondth, on the basis of environment protection health standard is met, the present invention replaces lead element using element silicon, controls its content
And the use level with other elements, it is possessed any surface finish of excellent casting character, either mobility or casting
Degree and grain size and uniformity coefficient all meet the quality requirements of sanitary equipment particularly high-grade sanitary appliance.
3rd, brass alloys of the invention are more conducive to gravitational casting compared with the brass alloys of prior art, right in gravitational casting
The mobility of alloy molten solution requires more much higher than conventional cast, represents the trend of sanitary equipment industry casting, and brass of the invention closes
It is that the mobility of alloy molten solution greatly improves that gold is most prominent, ensure that the quality and yield rate of brass gravitational casting.
Embodiment
With specific embodiment, the invention will be further described below, a kind of leadless environment-friendly silicon brass alloy material, the conjunction
The chemical composition of golden material is as follows：
Surplus is zinc and inevitable impurity.
The method for preparing above-mentioned alloy is as follows：The first step, power frequency induction furnace is preheated, from tough cathode and charcoal, to power frequency
Fed in induction furnace, charcoal is covered on tough cathode；
Second step, power frequency induction furnace is progressively heated, melt tough cathode；
3rd step, copper silicon intermediate alloy is added, the wherein mass percent of silicon is 10~20%；
4th step, fusing be sufficiently stirred plus No. zero zinc, is sufficiently stirred so that alloy molten solution is well mixed；
5th step, add refining agent and stir；
6th step, in sampling analysis, composition adjustment after being sufficiently stirred, until meeting above-mentioned casting character requirement；
7th step, stand, drag for slag, 1000~1100 DEG C of insulations, voltage 210V, standing 20 minutes makes contamination precipitation or float
To purify alloy molten solution；
8th step, it is warming up to 1150~1160 DEG C of cast of coming out of the stove.
The mass percent of the refining agent of 5th step forms：5 parts of ammonium chloride, 5 parts of potassium sulfate, 10 parts of sodium chloride,
5 parts of sodium carbonate, 10 parts of borax, 20 parts of coke powder, 10 parts of ice crystal.The refining agent can remove miscellaneous in brass refining agent solution
Matter, brass refining agent purity is improved, can more effectively remove impurity and slag inclusion inside copper alloy, purify copper liquid, reduce or disappear
Except copper ingot mirror-finishes impure point, Optimization of Copper alloy property, raw material production cost is reduced.
The content analyzed in 6th step includes：1. constituent analysis, element ratio is adjusted after analysis；2. metallographic crystal grain is examined
Survey and fluidity test, do not reach requirement addition refining agent such as；3. minute surface detects, the Hard Inclusion number after sample polishing is checked.
Following table is alloy formula (mass percent), three set products prepared
| Numbering | Copper | Silicon | Aluminium | Lead | Iron | Tin | Nickel | Zinc |
| Product 1 | 72 | 0.9 | 0.1 | 0.05 | 0.1 | 0.1 | 0.1 | Surplus |
| Product 2 | 75 | 1.9 | 0.12 | 0.07 | 0.15 | 0.15 | 0.2 | Surplus |
| Product 3 | 78 | 2.8 | 0.15 | 0.1 | 0.2 | 0.2 | 0.3 | Surplus |
First, casting character is tested
Following table is alloy product of the invention compared with HSi80-3 casting character
Learnt by the contrast of upper table, product 1- products 3 are relative to increase with HSi80-3 in casting character, especially
It is that product 2 substantially improves the defects of casting process, and yields significantly improves.
2nd, cutting ability is tested
Under identical machine-sensible conditions, the cutting force of each invention alloy is measured using cutting force experiment instrument, and thus
Calculate cutting sex index of each invention alloy relative to C36000, C36000 be universally acknowledged machinability it is best contain lead and yellow-collation
Copper, its machinability are considered as 100%.
Machine-sensible conditions
Cut evaluation result
| Alloy | Cut sex index (%) |
| C36000 | 100 |
| Product 1 | 88 |
| Product 2 | 92 |
| Product 3 | 89 |
It can be learnt by above-mentioned evaluation result, product 1-3 cutting ability is improved.
3rd, Mechanics Performance Testing
By the alloy and comparative example HSi80-3 alloys, standard tensile specimen is made, is carried out with universal material pull-test machine
Normal tensile property is tested, and product 1 and the mechanical property of product 3 slightly improve, and the mechanical property of product 2 is significantly improved, hence it is evident that
Better than product 1,3 and comparative example HSi80-3.
Following table is the Mechanics Performance Testing table of comparisons
Therefore the alloy in the present invention has extremely excellent cutting ability, excellent casting character, good welding performance, machine
Tool performance, the parts being molded especially suitable for machining, forging, casting and the parts material as other manufacture methods
Material.
Above-described embodiment is only presently preferred embodiments of the present invention, is not limited the scope of the invention according to this, therefore：It is all according to
The equivalence changes that structure, shape, the principle of the present invention is done, all should be covered by within protection scope of the present invention.
Claims (6)
1. a kind of leadless environment-friendly silizin shell of water flowmeter, it is characterised in that the chemical composition of the alloy material of the shell of water flowmeter is as follows：
A kind of 2. leadless environment-friendly silizin shell of water flowmeter according to claim 1, it is characterised in that the alloy material of the shell of water flowmeter
The chemical composition of material is as follows：
3. a kind of leadless environment-friendly silizin shell of water flowmeter according to claim 1 or 2, it is characterised in that the copper is electrolysis
Copper.
A kind of 4. leadless environment-friendly silizin shell of water flowmeter according to claim 1 or 2, it is characterised in that：Can not in the alloy
The impurity content avoided is no more than 0.8%.
A kind of 5. side of alloy in a kind of leadless environment-friendly silizin shell of water flowmeter prepared described in claim 1 or claim 2
Method, it is characterised in that comprise the following steps：
The first step, power frequency induction furnace is preheated, from tough cathode and charcoal, is fed into power frequency induction furnace, charcoal is covered in the moon
On the copper of pole；
Second step, power frequency induction furnace is progressively heated, melt tough cathode；
3rd step, copper silicon intermediate alloy is added, the wherein mass percent of silicon is 10~20%；
4th step, fusing be sufficiently stirred plus No. zero zinc, is sufficiently stirred so that alloy molten solution is well mixed；
5th step, add refining agent and stir；
6th step, in sampling analysis, composition adjustment after being sufficiently stirred, until meeting above-mentioned casting character requirement；
7th step, stand, drag for slag, 1000~1100 DEG C of insulations, voltage 210V, standing 20 minutes makes contamination precipitation or float with net
Alloy liquation；
8th step, it is warming up to 1150~1160 DEG C of cast of coming out of the stove.
6. the preparation method of alloy in a kind of leadless environment-friendly silizin shell of water flowmeter according to claim 5, it is characterised in that：
The mass percent of the refining agent of 5th step forms：5 parts of ammonium chloride, 5 parts of potassium sulfate, 10 parts of sodium chloride, sodium carbonate 5
Part, 10 parts of borax, 20 parts of coke powder, 10 parts of ice crystal.
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| CN201710697950.8A CN107604206A (en) | 2017-08-15 | 2017-08-15 | A kind of leadless environment-friendly silizin shell of water flowmeter and alloy preparation method |
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|---|---|---|---|---|
| CN101343702A (en) * | 2008-09-03 | 2009-01-14 | 浙江天申铜业有限公司 | Leadless environment friendly silicon brass alloy material suitable for gravity force cast and manufacture method thereof |
| CN101633987A (en) * | 2009-06-19 | 2010-01-27 | 浙江天申铜业有限公司 | Lead-free environmental silicon brass alloy bar or alloy ingot and preparation method thereof |
| CN104032164A (en) * | 2014-05-12 | 2014-09-10 | 蚌埠市宏威滤清器有限公司 | Leadless free-cutting silicon brass alloy material and preparation method thereof |
| CN104372199A (en) * | 2014-11-25 | 2015-02-25 | 浙江三瑞铜业有限公司 | Lead-free environment-friendly silicon brass |
| CN104775042A (en) * | 2015-04-16 | 2015-07-15 | 新疆大学 | Low-metal-loss smelting method of copper alloy |
-
2017
- 2017-08-15 CN CN201710697950.8A patent/CN107604206A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101343702A (en) * | 2008-09-03 | 2009-01-14 | 浙江天申铜业有限公司 | Leadless environment friendly silicon brass alloy material suitable for gravity force cast and manufacture method thereof |
| CN101633987A (en) * | 2009-06-19 | 2010-01-27 | 浙江天申铜业有限公司 | Lead-free environmental silicon brass alloy bar or alloy ingot and preparation method thereof |
| CN104032164A (en) * | 2014-05-12 | 2014-09-10 | 蚌埠市宏威滤清器有限公司 | Leadless free-cutting silicon brass alloy material and preparation method thereof |
| CN104372199A (en) * | 2014-11-25 | 2015-02-25 | 浙江三瑞铜业有限公司 | Lead-free environment-friendly silicon brass |
| CN104775042A (en) * | 2015-04-16 | 2015-07-15 | 新疆大学 | Low-metal-loss smelting method of copper alloy |
Non-Patent Citations (1)
| Title |
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Address after: 317200 Guan Tang Village (West Industrial Park), Shifeng street, Tiantai County, Taizhou, Zhejiang Applicant after: Zhejiang Zhonghan intelligent control Limited by Share Ltd Address before: 317200 Guan Tang Village (West Industrial Park), Shifeng street, Tiantai County, Taizhou, Zhejiang Applicant before: Zhejiang Han alloy materials Co., Ltd. |
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Application publication date: 20180119 |