CN108118184A - The production technology for preventing brass from cracking when being processed into valve body - Google Patents
The production technology for preventing brass from cracking when being processed into valve body Download PDFInfo
- Publication number
- CN108118184A CN108118184A CN201711382151.8A CN201711382151A CN108118184A CN 108118184 A CN108118184 A CN 108118184A CN 201711382151 A CN201711382151 A CN 201711382151A CN 108118184 A CN108118184 A CN 108118184A
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- CN
- China
- Prior art keywords
- temperature
- valve body
- processed
- cracking
- annealing
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C9/00—Alloys based on copper
- C22C9/04—Alloys based on copper with zinc as the next major constituent
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
- B23P15/001—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass valves or valve housings
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/26—Methods of annealing
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
- C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
- C22F1/08—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of copper or alloys based thereon
Abstract
The present invention refers in particular to a kind of production technology for preventing brass from cracking when being processed into valve body, belong to technical field of valve manufacturing, discriminating and screening including copper material, high temperature forging, the processing steps such as heat treatment and metal working processing, the present invention is in the production of valve body, stringent Filtering system is just employed from the selection of raw material, eliminate underproof raw material, and in the step of forging and heat treatment, the each element in copper material is made uniformly to be distributed in crystal, eliminate stress, improve the overall performance of product, it ensures in metal working process, more than 99% qualification rate can be reached, improve the quality of product, save substantial amounts of raw material and the energy.
Description
Technical field
The invention belongs to technical field of valve manufacturing, refer in particular to a kind of production work for preventing brass from cracking when being processed into valve body
Skill.
Background technology
Material used in production angle valve is generally brass, main chemical compositions：Cu (61%), Sn (0.8%), As
(0.05%), impurity (<0.3), Zn (surplus), the fusing point of main component：Copper is 1083.4 DEG C, and zinc is 419.5 DEG C, and tin is
327.5 DEG C, since comparision contents of the zinc in brass are high, and the molten difference formed between fusing point and fine copper is too big, if zinc is in Huang
Be unevenly distributed in copper, temperature rise, more than zinc fusing point when, be easy for Dezincification corrosion phenomenon occur, cause product occur point,
The problem of crackle and cracking, rejection rate is excessively high, and product quality is low, wastes substantial amounts of raw material and the energy.
The content of the invention
The object of the present invention is to provide a kind of production technologies for preventing brass from cracking when being processed into valve body, can reduce the number of rejects and seconds
Rate improves product quality.
The object of the present invention is achieved like this：The chemical composition of the brass is：Cu：59%-62%, Sn：0.5%-
1%, Pb：0.2%, Fe：0.1%, P：0.2%, As：0.02%-0.06%, Zn：37.418%, include the following steps：
Step 1: the discriminating and screening of copper material, copper material is subjected to high-temperature firing, temperature is 750-800 DEG C, and the firing time is
60-100 seconds, surface color is observed, point occurs, illustrates dezincification under high temperature, it is unqualified, surface then is beaten with iron hammer,
Surface texture is observed, it is cracked, illustrate unqualified, finally by machine tooling, vehicle game clock skin has seen whether interlayer and miscellaneous
Matter there are interlayer or impurity, illustrates unqualified, filters out qualified copper material through the above way；
It Step 2: high temperature forging, 700-740 DEG C is heated to by copper material, is made by the red machine that rushes, because copper material is from adding
Taken out in hot stove move to it is red rush machine during have the loss of heat, so temperature range when making is beaten at 680-730 DEG C
Time processed is within 5 seconds；
Step 3: heat treatment, the component after forging is made annealing treatment, annealing temperature is 440-500 DEG C, annealing time
For 6h, the type of cooling is that annealing furnace is air-cooled after being cooled to 300 DEG C；
Step 4: metal working is processed, the component after annealing is carried out turning is made valve body, while adds coolant holding
Component cools down.
Further optimization：Temperature is made as 710-720 DEG C in the step 2, is made at a temperature of the section, no
It is present with the bad defect of fracture and scaling, qualification rate reaches more than 99%.
Further optimization：Annealing temperature is 480-490 DEG C in the step 3, is annealed at a temperature of the section, product
It will not cracking, qualification rate reaches more than 96%.
Further optimization：In the step 4, when turning, adds coolant, and the temperature of holding member is less than less than 400 DEG C
The fusing point of zinc can reduce machining stress, prevent product from cracking.
The present invention is prominent and beneficial compared with prior art to be had the technical effect that：In the production of valve body, from the choosing of raw material
It selects and just employs stringent Filtering system, eliminate underproof raw material, and in the step of forging and heat treatment, make
Each element in copper material is uniformly distributed in crystal, eliminates stress, improves the overall performance of product, it is ensured that metal working adds
During work, more than 99% qualification rate can be reached, improve the quality of product, save substantial amounts of raw material and the energy.
Specific embodiment
With specific embodiment, the invention will be further described below, and the chemical composition of the brass is：Cu：59%-62%,
Sn：0.5%-1%, Pb：0.2%, Fe：0.1%, P：0.2%, As：0.02%-0.06%, Zn：37.418%, on the market
Corresponding former material model C46500 or C36500, when producing valve, the problem of being susceptible to crackle, cracking or point, sternly
The service life for having an effect on product of weight, when showing that processing temperature is excessively high in practice, the phenomenon that being susceptible to Dezincification corrosion, from
And cause the problem of point, crackle and cracking occur, in order to improve the qualification rate of product, summarized in multiple demonstration and experiment
Go out following production technology, specifically comprise the following steps：
Step 1: the discriminating and screening of copper material, copper material is subjected to high-temperature firing, temperature is 750-800 DEG C, and the firing time is
60-100 seconds, surface color is observed, point occurs, illustrates dezincification under high temperature, it is unqualified, surface then is beaten with iron hammer,
Surface texture is observed, it is cracked, illustrate unqualified, finally by machine tooling, vehicle game clock skin has seen whether interlayer and miscellaneous
Matter there are interlayer or impurity, illustrates unqualified, filters out qualified copper material through the above way；
It Step 2: high temperature forging, 700-740 DEG C is heated to by copper material, is made by the red machine that rushes, because copper material is from adding
Taken out in hot stove move to it is red rush machine during have the loss of heat, so temperature range when making is beaten at 680-730 DEG C
Time processed, the optimal temperature of making in the step 2 was made, no for 710-720 DEG C at a temperature of the section within 5 seconds
It is present with the bad defect of fracture and scaling, qualification rate reaches more than 99%, in order to verify optimal temperature of making for 710-720
DEG C, it for 680-730 DEG C of silicon carbide when making, compares one by one, when temperature is more than 720 DEG C, under qualification rate starts
Drop, comparing result such as following table；
| Make temperature DEG C | Qualification rate % after machining | Bad defect | Remarks |
| 680 | 82 | Fracture, scaling | |
| 690 | 85 | Fracture, scaling | |
| 700 | 97 | Fracture | |
| 710 | 99.5 | ||
| 720 | 99.7 | ||
| 730 | 97 | Fracture |
Step 3: heat treatment, the component after forging is made annealing treatment, annealing temperature is 440-500 DEG C, annealing time
For 6h, the type of cooling is that annealing furnace is air-cooled after being cooled to 300 DEG C, and annealing temperature is 480-490 DEG C in the step 3, at this
It anneals at a temperature of section, product will not cracking, and qualification rate reaches more than 96%, contrast and experiment such as following table；
| Annealing temperature DEG C | Annealing time (h) | Cooling means | Qualification rate % | Remarks |
| 440 | 6 | Furnace temperature is down to 300 | 70 | It cracks bad |
| 450 | 6 | Furnace temperature is down to 300 | 82 | It cracks bad |
| 465 | 6 | Furnace temperature is down to 300 | 85 | It cracks bad |
| 480 | 6 | Furnace temperature is down to 300 | 96 | |
| 490 | 6 | Furnace temperature is down to 300 | 97 | |
| 500 | 6 | Furnace temperature is down to 300 | 95 |
Step 4: metal working is processed, the component after annealing is carried out turning is made valve body, while adds coolant holding
Component cools down, and in the step 4, when turning adds coolant, and the temperature of holding member is less than 400 DEG C, less than the fusing point of zinc,
Machining stress can be reduced, prevents product from cracking, in order to verify the validity of coolant, processed product has been divided into eight batches
Secondary, wherein be not added with coolant during four batch turning, when four additional batch turning, adds coolant, final qualification rate comparison knot
Fruit such as following table：
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, should all be covered by within protection scope of the present invention.
Claims (4)
1. the production technology for preventing brass from cracking when being processed into valve body, the chemical composition of the brass are：Cu：59%-62%, Sn：
0.5%-1%, Pb：0.2%, Fe：0.1%, P：0.2%, As：0.02%-0.06%, Zn：37.418%, which is characterized in that
Include the following steps：
Step 1: the discriminating and screening of copper material, carry out high-temperature firing, temperature is 750-800 DEG C, firing time 60- by copper material
100 seconds, surface color is observed, then beats surface with iron hammer, surface texture is observed, finally by machine tooling, Che Kai
Epidermis has seen whether interlayer and impurity, filters out qualified copper material；
Step 2: high temperature forging, 700-740 DEG C is heated to by copper material, made by the red machine that rushes, temperature range when making
At 680-730 DEG C, the time is made within 5 seconds；
Step 3: heat treatment, the component after forging is made annealing treatment, annealing temperature is 440-500 DEG C, and annealing time is
6h, the type of cooling are that annealing furnace is air-cooled after being cooled to 300 DEG C；
Step 4: metal working is processed, the component after annealing is carried out turning is made valve body, while adds cooling liquid holding component
Cooling.
2. the production technology according to claim 1 for preventing brass from cracking when being processed into valve body, it is characterised in that：The step
Temperature is made as 710-720 DEG C in rapid two.
3. the production technology according to claim 1 for preventing brass from cracking when being processed into valve body, it is characterised in that：The step
Annealing temperature is 480-490 DEG C in rapid three.
4. the production technology according to claim 1 for preventing brass from cracking when being processed into valve body, it is characterised in that：The step
In rapid four, when turning, adds coolant, and the temperature of holding member is less than 400 DEG C.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711382151.8A CN108118184A (en) | 2017-12-20 | 2017-12-20 | The production technology for preventing brass from cracking when being processed into valve body |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711382151.8A CN108118184A (en) | 2017-12-20 | 2017-12-20 | The production technology for preventing brass from cracking when being processed into valve body |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108118184A true CN108118184A (en) | 2018-06-05 |
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ID=62229535
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711382151.8A Pending CN108118184A (en) | 2017-12-20 | 2017-12-20 | The production technology for preventing brass from cracking when being processed into valve body |
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| CN (1) | CN108118184A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109794569A (en) * | 2019-01-17 | 2019-05-24 | 宁波埃美柯铜阀门有限公司 | A kind of brass water nozzle hot forging of valve body bends molding production technology |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101573462A (en) * | 2006-12-28 | 2009-11-04 | 株式会社开滋 | Lead-free brass alloy with excellent resistance to stress corrosion cracking |
| CN102312123A (en) * | 2011-09-02 | 2012-01-11 | 浙江艾迪西流体控制股份有限公司 | Brass alloy |
| CN103831597A (en) * | 2014-04-01 | 2014-06-04 | 台州市中奥特种设备检测技术服务有限公司 | Copper alloy valve forging production processing technique |
| CN106460135A (en) * | 2014-04-30 | 2017-02-22 | 株式会社开滋 | Production method for hot-forged articles using brass, hot-forged article, and fluid-contact product such as valve or tap, molded using same |
-
2017
- 2017-12-20 CN CN201711382151.8A patent/CN108118184A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101573462A (en) * | 2006-12-28 | 2009-11-04 | 株式会社开滋 | Lead-free brass alloy with excellent resistance to stress corrosion cracking |
| CN102312123A (en) * | 2011-09-02 | 2012-01-11 | 浙江艾迪西流体控制股份有限公司 | Brass alloy |
| CN103831597A (en) * | 2014-04-01 | 2014-06-04 | 台州市中奥特种设备检测技术服务有限公司 | Copper alloy valve forging production processing technique |
| CN106460135A (en) * | 2014-04-30 | 2017-02-22 | 株式会社开滋 | Production method for hot-forged articles using brass, hot-forged article, and fluid-contact product such as valve or tap, molded using same |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109794569A (en) * | 2019-01-17 | 2019-05-24 | 宁波埃美柯铜阀门有限公司 | A kind of brass water nozzle hot forging of valve body bends molding production technology |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| CB02 | Change of applicant information | ||
| CB02 | Change of applicant information |
Address after: 317600 Huandong Industrial Zone, Yucheng street, Yuhuan City, Zhejiang Province Applicant after: Taizhou Jinlong Dafeng water heating Co., Ltd Address before: 317600, Dong Cheng Industrial Zone, Chengguan Town, Taizhou, Zhejiang, Yuhuan County Applicant before: YUHUAN JINLONG KLOE SANITARYWARE CO., LTD. |
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| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20180605 |