CN104313387B - A kind of corrosion-resistant brass material and preparation method thereof - Google Patents
A kind of corrosion-resistant brass material and preparation method thereof Download PDFInfo
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- CN104313387B CN104313387B CN201410525330.2A CN201410525330A CN104313387B CN 104313387 B CN104313387 B CN 104313387B CN 201410525330 A CN201410525330 A CN 201410525330A CN 104313387 B CN104313387 B CN 104313387B
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- copper
- lanthana
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Abstract
The present invention relates to a kind of corrosion-resistant brass material and preparation method thereof.The percentage by weight composition of described alloy material: copper (Cu) 55 ~ 74%, remaining is the inevitable impurity that zinc (Zn) and total amount are not more than 0.5%, lanthana (La2O3) treating capacity is 0.2 ~ 1.5%.The present invention uses lanthana to process basis brass material, make alloy microstructure generation significant change, tissue is purified, improve corrosion resistance and the plasticity thereof of alloy material, reduce the yield strength of alloy material, make it have good comprehensive mechanical property, be adapted to manufacture cleaners and polishes, plumbing, instrument and meter condenser pipe and the valve etc. that corrosion resistance requires.With pure simple substance rare-earth phase ratio, rare earth oxide is readily available, low price, and rare earth utilization rate is high.
Description
Technical field
The present invention relates to a kind of employing lanthana process and improve the corrosion proof process of basis brass material, belong to material
Material anticorrosion technique and Metal Melting technical field.
Background technology
Brass has excellent mechanical property, corrosion resistance, conduction and heat conductivility and processing technology, thus by extensively
It is used for manufacturing cleaners and polishes, plumbing, instrument and meter and hydraulic valve etc..But in use there is Dezincification corrosion in brass
Problem, i.e. Zn-ef ficiency is preferentially corroded and comes off, and leaves loose and porous structure, the serious mechanical property reducing brass, shortens
In service life, also bring potential safety hazard.For many years in order to suppress the Dezincification corrosion of brass, researchers take multiple arranging
Executing, wherein, adding alloying element is effective method.Currently used alloying element has arsenic, boron, tin, nickel, rare earth etc..Its
Middle As is the element being most widely used, but As has severe toxicity, and the health of human body can be caused by the volatilization during producing, using
Injury, should avoid using future as far as possible.
In recent years, rare earth element is widely studied in metal alloy because of physics and the chemical property of its uniqueness, people
Have studied interpolation rare earth metal to improve the Dezincification corrosion performance of brass, have a significant effect, the mechanics to Cu alloy material
Performance also creates favorable influence.The most reasonably utilize the rare earth resources of China with improve brass material corrosion resistance,
Improve its mechanical property and there is important research and actual application value.
Summary of the invention
It is an object of the invention to use lanthana process technique, it is provided that a kind of anti-Dezincification corrosion performance is good, plasticity is high and
There is the brass material of higher-strength and hardness；It is a further object of the present invention to provide the preparation method of above-mentioned brass material.
The present invention is realized by following measures:
A kind of high corrosion-resistant brass material of the present invention, is made up of the material of following percentage by weight: copper (Cu) 55 ~
74%, remaining is the inevitable impurity that zinc (Zn) and total amount are not more than 0.5%, lanthana (La2O3) treating capacity is 0.2 ~
1.5%。
The corrosion resistance brass material of the invention described above, the optimal set of described material becomes: copper (Cu) 60.5 ~ 63.5%, remaining
The inevitable impurity of 0.5%, optimum oxidation lanthanum (La it is not more than for zinc (Zn) and total amount2O3) treating capacity is 0.8%.
Owing to lanthana is powder, and density is less, and fusing point is higher, so adding relatively difficult, the recovery rate of lanthanum is relatively
Low.For solving this problem, the present invention uses copper powder mixing briquet bigger to lanthanum oxide powder and density, adds gold
Belong to the process of liquation.
The invention described above corrosion resistance brass material is realized by following preparation method, the steps include:
(1) by copper powder (200 mesh) and La2O3(200 mesh) uniformly mixes according to the mass ratio of 1:1, then is pressed into hydraulic press
Bulk, pressure used is 50 ~ 80 MPa, and the dwell time is 1 ~ 5 minute；
(2) electrolysis copper billet (plate) is put in graphite-clay crucible, add heat fusing with medium-frequency induction furnace.Will melt at copper
Before changing, addition cullet are as coverture, prevent the oxidation of metallic copper, heat up and are melted to 1100 ~ 1200 DEG C, add the zinc of preheating
Ingot bar, makes zinc be completely melt with carbon-point stirring；
(3) aluminium alloy is continuously heating to 1300 ~ 1400 DEG C, adds block lanthana and copper powder mixture, stirs with carbon-point
Mixing, stand 5 ~ 10 minutes, turn down temperature, aluminium alloy is at about 1200 DEG C castables of coming out of the stove.
The present invention uses the method that lanthana processes on the basis of basis brass so that the microstructure of brass there occurs
Bigger change, is changed into equiax crystal, and grain coarsening by dendrite time untreated, and this makes crystal boundary reduce, simultaneously to de-
The quantity of the second phase β phase that zine corrosion is more sensitive also reduces, and these factors make the anti-Dezincification corrosion performance of material of the present invention
Increase.The experiment display of standard anti-Dezincification corrosion, the weight-loss corrosion speed of brass material of the present invention is significantly less than existing basis brass
The weight-loss corrosion speed of material.
The transformation of crystalline form makes the elongation percentage of brass material of the present invention be greatly improved, and yield strength, tensile strength
And hardness has slightly reduction.Brass is usually utilized to manufacture tubing, the raising of material elongation percentage of the present invention and yield strength
Suitably reduce and be conducive to plastic working shaping, reduce power consumption, protect mold for forming, and now its tensile strength and hardness decline
Not quite, there is preferable comprehensive mechanical property.
In sum, material of the present invention has good corrosion resistance and comprehensive mechanical property, and being adapted to manufacture has anti-corrosion
Property require cleaners and polishes, plumbing, instrument and meter condenser pipe and valve etc..
Accompanying drawing explanation
Fig. 1 embodiment of the present invention and the Performance comparision of comparative example material.
Detailed description of the invention
Embodiment 1
The composition weight proportion (wt%) of invention embodiment material is: 62%Cu, and remaining is Zn and inevitable impurity, oxygen
Change lanthanum (La2O3) treating capacity is 0.2%.
Following steps are taked to prepare:
(1) by copper powder and La2O3Mix according to the mass ratio of 1:1, then be pressed into bulk, pressure used with hydraulic press
For 50MPa, the dwell time is 1 minute；
(2) copper billet is put in graphite crucible, add heat fusing with medium-frequency induction furnace, broken glass will be added before melting at copper
Glass, as coverture, heats up and melts and be superheated to 1150 DEG C, adds the spelter of preheating, allows zinc be completely melt with carbon-point stirring；
(3) aluminium alloy is continuously heating to 1330 DEG C, adds block lanthana and copper powder mixture, stir with carbon-point, quiet
Putting 10 minutes, aluminium alloy is at about 1200 DEG C castables of coming out of the stove.The performance of gained alloy is shown in Fig. 1.
Embodiment 2
The composition weight proportion (wt%) of invention embodiment material is: 62%Cu, and remaining is Zn and inevitable impurity.Oxygen
Change lanthanum (La2O3) treating capacity is 0.8%.
Following steps are taked to prepare:
(1) by copper powder and La2O3Mix according to the mass ratio of 1:1, then be pressed into bulk, pressure used with hydraulic press
For 60MPa, the dwell time is 3 minutes；
(2) copper billet is put in graphite crucible, add heat fusing with medium-frequency induction furnace, broken glass will be added before melting at copper
Glass, as coverture, heats up and melts and be superheated to 1170 DEG C, adds the spelter of preheating, allows zinc be completely melt with carbon-point stirring；
(3) aluminium alloy is continuously heating to 1370 DEG C, adds block lanthana and copper powder mixture, stir with carbon-point, quiet
Putting 8 minutes, aluminium alloy is at about 1200 DEG C castables of coming out of the stove.The performance of gained alloy is shown in Fig. 1.
Embodiment 3
The composition weight proportion (wt%) of invention embodiment material is: 62%Cu, and remaining is Zn and inevitable impurity, oxygen
Change lanthanum (La2O3) treating capacity is 1.4%.
Following steps are taked to prepare:
(1) by copper powder and La2O3Mix according to the mass ratio of 1:1, then be pressed into bulk, pressure used with hydraulic press
For 70MPa, the dwell time is 5 minutes；
(2) copper billet is put in graphite crucible, add heat fusing with medium-frequency induction furnace, broken glass will be added before melting at copper
Glass, as coverture, heats up and melts and be superheated to 1180 DEG C, adds the spelter of preheating, allows zinc be completely melt with carbon-point stirring；
(3) aluminium alloy is continuously heating to 1380 DEG C, adds block lanthana and copper powder mixture, stir with carbon-point, quiet
Putting 10 minutes, aluminium alloy is at about 1200 DEG C castables of coming out of the stove.The performance of gained alloy is shown in Fig. 1.
Embodiment 4
The composition weight proportion (wt%) of invention embodiment material is: 70 %Cu, 0.8% La2O3, remaining is Zn and can not
Avoid impurity, lanthana (La2O3) treating capacity is 1.4%.
Following steps are taked to prepare:
(1) by copper powder and La2O3Mix according to the mass ratio of 1:1, then be pressed into bulk, pressure used with hydraulic press
For 50MPa, the dwell time is 3 minutes；
(2) copper billet is put in graphite crucible, add heat fusing with medium-frequency induction furnace, broken glass will be added before melting at copper
Glass, as coverture, heats up and melts and be superheated to 1170 DEG C, adds the spelter of preheating, allows zinc be completely melt with carbon-point stirring；
(3) aluminium alloy is continuously heating to 1370 DEG C, adds block lanthana and copper powder mixture, stir with carbon-point, quiet
Putting 8 minutes, aluminium alloy is at about 1200 DEG C castables of coming out of the stove.The performance of gained alloy is shown in Fig. 1.
Choosing the H62 copper alloy close with embodiment alloy constituent element as a comparison case 1, its constituent is: 62%Cu, its
Remaining is Zn and inevitable impurity.Each performance comparison result of comparative example 1 and embodiment is as shown in Figure 1.Result shows, this
The Dezincification corrosion resistant of bright alloy ratio H62 copper alloy is obviously improved, and weight-loss corrosion speed is minimum drops to 12.592g m-2·h-1, fall
Low by 24%.The elongation percentage of alloy ratio H62 copper alloy the most of the present invention is the highest rises to 45.8%, improves 48.7 %, and surrender is strong
Degree reduces 12 %.Optimum oxidation lanthanum treating capacity is 0.8% as shown in Figure 1.
Choose H62 copper alloy that is close with embodiment alloy constituent element and that be added thereto to simple substance lanthanum (La) as a comparison simultaneously
Example 2, its constituent is: 62%Cu, 0.6%La, remaining be Zn and inevitable impurity.Comparative example 2 and each property of embodiment
Energy comparing result is as shown in Figure 1.Result shows, when lanthanum amount is suitable with the treating capacity of lanthana, (comparative example 2 compares with embodiment 2
Relatively), what the effect of lanthanum did not use that lanthana processes is effective.With pure simple substance rare-earth phase ratio, rare earth oxide is readily available, valency
Lattice are cheap, and rare earth utilization rate is high.So using lanthana to process brass, its corrosion resistance of raising and comprehensive mechanical property are had bright
Aobvious advantage.
Claims (3)
1. a corrosion-resistant brass material, is characterized in that being made up of the material of following weight proportion: copper (Cu) is 55 ~ 74%, remaining
The inevitable impurity of 0.5%, lanthana (La it is not more than for zinc (Zn) and total amount2O3) treating capacity is 0.2 ~ 1.5%.
Brass material the most according to claim 1, the most preferred group of described material becomes: copper (Cu) is 60.5 ~ 63.5%,
Remaining is the inevitable impurity that zinc (Zn) and total amount are not more than 0.5%, optimum oxidation lanthanum (La2O3) treating capacity is 0.8%.
3. a preparation method for corrosion-resistant brass material described in claim 1, it is characterized in that use following steps:
(1) by copper powder and the La of 200 mesh granularities of 200 mesh granularities2O3Uniformly mix according to the mass ratio of 1:1, re-compacted one-tenth block
Shape, pressure used is 50 ~ 80 MPa, and the dwell time is 1 ~ 5 minute；
(2) electrolytic copper plate is put in graphite-clay crucible, add heat fusing with medium-frequency induction furnace, front addition will be melted at copper
Cullet, as coverture, prevent the oxidation of metallic copper, and being heated up by aluminium alloy is melted to 1100 ~ 1200 DEG C, adds the zinc of preheating
Ingot bar, makes zinc be completely melt with carbon-point stirring；
(3) aluminium alloy is continuously heating to 1300 ~ 1400 DEG C, adds block lanthana and copper powder mixture, stir with carbon-point,
Standing 5 ~ 10 minutes, turn down temperature, aluminium alloy is at about 1200 DEG C castables of coming out of the stove.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410525330.2A CN104313387B (en) | 2014-10-09 | 2014-10-09 | A kind of corrosion-resistant brass material and preparation method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410525330.2A CN104313387B (en) | 2014-10-09 | 2014-10-09 | A kind of corrosion-resistant brass material and preparation method thereof |
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| Publication Number | Publication Date |
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| CN104313387A CN104313387A (en) | 2015-01-28 |
| CN104313387B true CN104313387B (en) | 2016-08-17 |
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| CN106399746A (en) * | 2016-07-04 | 2017-02-15 | 济南大学 | High-strength corrosion-resistant brass material and preparation and application thereof |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101805841A (en) * | 2009-11-23 | 2010-08-18 | 中南大学 | Rare earth oxide unleaded free-cutting brass and preparation method thereof |
| CN104073679A (en) * | 2014-06-30 | 2014-10-01 | 中色奥博特铜铝业有限公司 | Environment-friendly rare earth aluminum brass alloy with high corrosion resistance and preparation method thereof |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5629643A (en) * | 1979-08-16 | 1981-03-25 | Furukawa Kinzoku Kogyo Kk | Corrosion resistant free cutting brass |
| US10351933B2 (en) * | 2012-02-01 | 2019-07-16 | Toto Ltd. | Brass with excellent corrosion resistance |
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2014
- 2014-10-09 CN CN201410525330.2A patent/CN104313387B/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101805841A (en) * | 2009-11-23 | 2010-08-18 | 中南大学 | Rare earth oxide unleaded free-cutting brass and preparation method thereof |
| CN104073679A (en) * | 2014-06-30 | 2014-10-01 | 中色奥博特铜铝业有限公司 | Environment-friendly rare earth aluminum brass alloy with high corrosion resistance and preparation method thereof |
Non-Patent Citations (1)
| Title |
|---|
| 黄铜脱锌腐蚀的研究进展;李勇 等;《腐蚀与防护》;20060531;第27卷(第5期);第224页右栏最后1段-第225页左栏前2段，图3 * |
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