CN105154767A - Corrosion-resistant noble metal powder metallurgy composite material and preparation method thereof - Google Patents
Corrosion-resistant noble metal powder metallurgy composite material and preparation method thereof Download PDFInfo
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- CN105154767A CN105154767A CN201510541948.2A CN201510541948A CN105154767A CN 105154767 A CN105154767 A CN 105154767A CN 201510541948 A CN201510541948 A CN 201510541948A CN 105154767 A CN105154767 A CN 105154767A
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Abstract
The invention discloses a corrosion-resistant noble metal powder metallurgy composite material and a preparation method thereof. The corrosion-resistant noble metal powder metallurgy composite material consists of the following components in percentage by mass: 15%-35% of copper, 2.0%-5.6% of palladium, 0.25%-1.45% of platinum, 1.0%-4.5% of silicon dioxide, 0.38%-1.85% of cadmium, 1.5%-5.6% of nickel, 1.2%-3.4% of titanium dioxide, 2.5%-4.9% of polyimide and the balance of Fe. According to the corrosion-resistant noble metal powder metallurgy composite material, noble metal elements and the polyimide are added into the powder metallurgy material, so that corrosion resistance of the material can be effectively improved, a corrosion rate of the material is reduced and the service life of the material is prolonged. The corrosion-resistant noble metal powder metallurgy composite material is respectively soaked in acidic, basic and high-salt solvents to investigate corrosion resistance; and according to the results, the corrosion rate of the material in acidic and basic salt systems is lower than 0.01mm/a.
Description
Technical field
The present invention relates to metallurgical matrix material of a kind of corrosion-resistant noble metal powder and preparation method thereof, belong to mmaterial technical field.
Background technology
Powder metallurgy is with metal-powder (or mixture of metal-powder and non-metal powder) for starting material, manufactures the advanced technologies of metal, matrix material and all kinds of manufactured part through the serial operation such as overmulling powder, compacting, sintering.Because sintered metal product working accuracy is high, size is easy to control, especially in the production of complicated shape part, almost reach disposal molding, significantly reduce post-treatment loss, there is superior economic benefit.Metallic corrosion phenomenon is very general, as steel and iron member getting rusty in an atmosphere, brass work is long verdigris in malaria, and the pipeline being embedded in underground is bored a hole because of corrosion, the generation of iron scale in rolling process, the brittle rupture etc. of thermal power plant's boiler is all the example of metallic corrosion.
The strong corrosive medias such as the frequent contact acid of chemical process, alkali, salt and organic solvent, therefore corrosion and Chemical Manufacture are accompanied, the particularly development of modern chemical industry, require to produce to run under high temperature, high pressure, successively operational condition.Under working condition harsh like this, once corrosion failure appears in equipment, whole production equipment just will be stopped production, and causes serious financial loss.The local failures such as stress corrosion, hydrogen embrittlement, pitting be difficult to prediction, easily cause the paroxysmal disaster accidents such as the blast of chemical industry equipment, fire, jeopardize the personnel safety of worker.Corrode " run, drip, leak " of equipment that cause, make many toxicants leak in air, soil, water source, the severe contamination environment of human lives, the health of harm humans.In addition, if inflammable and explosive content leaks is in environment, consequence is by hardly imaginable.Cause the serious accidents such as air crash, steamer sinking, train accident, bridge breaking due to key position generation corrosion cracking, seriously jeopardize personnel safety.Study a kind of highly corrosion resistant alloy material being applicable to chemical industry extremely urgent.
Summary of the invention
The object of this invention is to provide metallurgical matrix material of a kind of corrosion-resistant noble metal powder and preparation method thereof, in mmaterial, add precious metal element and polyimide, effectively can improve the corrosion resistance nature of material, reduce erosion rate, increase the service life.
To achieve these goals, the technique means that the present invention adopts is:
The metallurgical matrix material of corrosion-resistant noble metal powder, composition and each composition quality percentage composition are: copper 15% ~ 35%, palladium 2.0% ~ 5.6%, platinum 0.25% ~ 1.45%, silica 1 .0% ~ 4.5%, cadmium 0.38% ~ 1.85%, nickel 1.5% ~ 5.6%, titanium dioxide 1.2% ~ 3.4%, polyimide 2.5% ~ 4.9%, surplus is Fe.
The metallurgical matrix material of described corrosion-resistant noble metal powder, composition and each composition quality percentage composition are: copper 18% ~ 28%, palladium 2.6% ~ 4.2%, platinum 0.55% ~ 1.05%, silicon-dioxide 2.4% ~ 3.5%, cadmium 0.78% ~ 1.35%, nickel 2.8% ~ 4.6%, titanium dioxide 1.8% ~ 2.4%, polyimide 2.8% ~ 3.8%, surplus is Fe.
The metallurgical matrix material of described corrosion-resistant noble metal powder, composition and each composition quality percentage composition are: copper 22%, palladium 3.6%, platinum 0.85%, silicon-dioxide 2.8%, cadmium 1.15%, nickel 3.5%, titanium dioxide 2.2%, polyimide 3.5%, and surplus is Fe.
The preparation method of the metallurgical matrix material of described corrosion-resistant noble metal powder, comprises the steps:
1) batch mixing: each composition is joined in mixer and carries out batch mixing, rotating speed is 30 ~ 50rpm, and mixing time is 40 ~ 60min;
2) join in press equipment by the batch mixing of step 1), extrusion forming, pressure is 400 ~ 600MPa, pressurize 40 ~ 60min;
3) by step 2) sample that suppresses sinters in sintering oven, and sintering temperature is 950 ~ 1150 DEG C, and sintering time is 30 ~ 50min, and then at 550 ~ 650 DEG C, be incubated 10 ~ 30min, cancellation, is finally incubated tempering 1 ~ 3h at 250 ~ 350 DEG C;
4) casting: alloy material step 3) being incubated tempering is cast as required component.
Step 2) in pressure be 500MPa, pressurize 50min.
In step 3), sintering temperature is 1050 DEG C, and sintering time is 40min.
Beneficial effect: the invention provides metallurgical matrix material of a kind of corrosion-resistant noble metal powder and preparation method thereof, precious metal element and polyimide is added in mmaterial, effectively can improve the corrosion resistance nature of material, reduce erosion rate, increase the service life.Soak in acidity, alkalescence and high salt solvent respectively, investigate its corrosion resistance nature, result shows, in acid-alkali salt system, corrosion speed is lower than 0.01mm/a.
Embodiment
Embodiment 1
The metallurgical matrix material of corrosion-resistant noble metal powder, composition and each composition quality percentage composition are: copper 15%, palladium 2.0%, platinum 0.25%, silica 1 .0%, cadmium 0.38%, nickel 1.5%, titanium dioxide 1.2%, polyimide 2.5%, and surplus is Fe.
Preparation method, comprises the steps:
1) batch mixing: each composition is joined in mixer and carries out batch mixing, rotating speed is 40rpm, and mixing time is 50min;
2) join in press equipment by the batch mixing of step 1), extrusion forming, pressure is 500MPa, pressurize 50min;
3) by step 2) sample that suppresses sinters in sintering oven, and sintering temperature is 1050 DEG C, and sintering time is 40min, then at 600 DEG C, is incubated 20min, cancellation, finally at 300 DEG C, is incubated tempering 2h;
4) casting: alloy material step 3) being incubated tempering is cast as valve.
Embodiment 2
The metallurgical matrix material of corrosion-resistant noble metal powder, composition and each composition quality percentage composition are: copper 35%, palladium 5.6%, platinum 1.45%, silicon-dioxide 4.5%, cadmium 1.85%, nickel 5.6%, titanium dioxide 3.4%, polyimide 4.9%, and surplus is Fe.
Preparation method, comprises the steps:
1) batch mixing: each composition is joined in mixer and carries out batch mixing, rotating speed is 40rpm, and mixing time is 50min;
2) join in press equipment by the batch mixing of step 1), extrusion forming, pressure is 500MPa, pressurize 50min;
3) by step 2) sample that suppresses sinters in sintering oven, and sintering temperature is 1050 DEG C, and sintering time is 40min, then at 600 DEG C, is incubated 20min, cancellation, finally at 300 DEG C, is incubated tempering 2h;
4) casting: alloy material step 3) being incubated tempering is cast as valve.
Embodiment 3
The metallurgical matrix material of corrosion-resistant noble metal powder, composition and each composition quality percentage composition are: copper 18%, palladium 2.6%, platinum 0.55%, silicon-dioxide 2.4%, cadmium 0.78%, nickel 2.8%, titanium dioxide 1.8%, polyimide 2.8%, and surplus is Fe.
Preparation method, comprises the steps:
1) batch mixing: each composition is joined in mixer and carries out batch mixing, rotating speed is 40rpm, and mixing time is 50min;
2) join in press equipment by the batch mixing of step 1), extrusion forming, pressure is 500MPa, pressurize 50min;
3) by step 2) sample that suppresses sinters in sintering oven, and sintering temperature is 1050 DEG C, and sintering time is 40min, then at 600 DEG C, is incubated 20min, cancellation, finally at 300 DEG C, is incubated tempering 2h;
4) casting: alloy material step 3) being incubated tempering is cast as valve.
Embodiment 4
The metallurgical matrix material of corrosion-resistant noble metal powder, composition and each composition quality percentage composition are: copper 28%, palladium 4.2%, platinum 1.05%, silicon-dioxide 3.5%, cadmium 1.35%, nickel 4.6%, titanium dioxide 2.4%, polyimide 3.8%, and surplus is Fe.
Preparation method, comprises the steps:
1) batch mixing: each composition is joined in mixer and carries out batch mixing, rotating speed is 40rpm, and mixing time is 50min;
2) join in press equipment by the batch mixing of step 1), extrusion forming, pressure is 500MPa, pressurize 50min;
3) by step 2) sample that suppresses sinters in sintering oven, and sintering temperature is 1050 DEG C, and sintering time is 40min, then at 600 DEG C, is incubated 20min, cancellation, finally at 300 DEG C, is incubated tempering 2h;
4) casting: alloy material step 3) being incubated tempering is cast as valve.
Embodiment 5
The metallurgical matrix material of corrosion-resistant noble metal powder, composition and each composition quality percentage composition are: copper 22%, palladium 3.6%, platinum 0.85%, silicon-dioxide 2.8%, cadmium 1.15%, nickel 3.5%, titanium dioxide 2.2%, polyimide 3.5%, and surplus is Fe.
The application of the metallurgical matrix material of described corrosion-resistant noble metal powder in production construction equipment, be valve by metallurgical for corrosion-resistant noble metal powder composite processing, working method comprises the steps:
1) batch mixing: each composition is joined in mixer and carries out batch mixing, rotating speed is 60rpm, and mixing time is 40min;
2) join in press equipment by the batch mixing of step 1), extrusion forming, pressure is 500MPa, pressurize 20min;
3) by step 2) sample that suppresses sinters in sintering oven, and sintering temperature is 1150 DEG C, and sintering time is 20min, then at 280 DEG C, is incubated 10min, cancellation, finally at 150 DEG C, is incubated tempering 2h;
4) casting: alloy material step 3) being incubated tempering is cast as valve.
Performance test is carried out to the fluid origin valve of embodiment 1 ~ 5, the results are shown in Table shown in 1.
Table 1:
| Embodiment 1 | Embodiment 2 | Embodiment 3 | Embodiment 4 | Embodiment 5 | |
| Corrosion speed/(mm/a) | 0.009 | 0.008 | 0.008 | 0.007 | 0.005 |
| Spot corrosion time/d | 1050 | 1120 | 1310 | 1380 | 1540 |
Spot corrosion refers to that the corrosion resistant material surface of crevice corrosion medium produces the corrosion phenomenon of perforation or pit, and the spot corrosion time of the present invention is the time occurring spot corrosion when acid (pH=3), alkalescence (pH=9).
Claims (6)
1. the metallurgical matrix material of corrosion-resistant noble metal powder, it is characterized in that composition and each composition quality percentage composition are: copper 15% ~ 35%, palladium 2.0% ~ 5.6%, platinum 0.25% ~ 1.45%, silica 1 .0% ~ 4.5%, cadmium 0.38% ~ 1.85%, nickel 1.5% ~ 5.6%, titanium dioxide 1.2% ~ 3.4%, polyimide 2.5% ~ 4.9%, surplus is Fe.
2. the metallurgical matrix material of corrosion-resistant noble metal powder according to claim 1, it is characterized in that composition and each composition quality percentage composition are: copper 18% ~ 28%, palladium 2.6% ~ 4.2%, platinum 0.55% ~ 1.05%, silicon-dioxide 2.4% ~ 3.5%, cadmium 0.78% ~ 1.35%, nickel 2.8% ~ 4.6%, titanium dioxide 1.8% ~ 2.4%, polyimide 2.8% ~ 3.8%, surplus is Fe.
3. the metallurgical matrix material of corrosion-resistant noble metal powder according to claim 2, is characterized in that composition and each composition quality percentage composition are: copper 22%, palladium 3.6%, platinum 0.85%, silicon-dioxide 2.8%, cadmium 1.15%, nickel 3.5%, titanium dioxide 2.2%, polyimide 3.5%, surplus is Fe.
4. the preparation method of the metallurgical matrix material of corrosion-resistant noble metal powder described in claim 1, is characterized in that comprising the steps:
1) batch mixing: each composition is joined in mixer and carries out batch mixing, rotating speed is 30 ~ 50rpm, and mixing time is 40 ~ 60min;
2) join in press equipment by the batch mixing of step 1), extrusion forming, pressure is 400 ~ 600MPa, pressurize 40 ~ 60min;
3) by step 2) sample that suppresses sinters in sintering oven, and sintering temperature is 950 ~ 1150 DEG C, and sintering time is 30 ~ 50min, and then at 550 ~ 650 DEG C, be incubated 10 ~ 30min, cancellation, is finally incubated tempering 1 ~ 3h at 250 ~ 350 DEG C;
4) casting: alloy material step 3) being incubated tempering is cast as required component.
5. the preparation method of the metallurgical matrix material of corrosion-resistant noble metal powder according to claim 4, is characterized in that: step 2) in pressure be 500MPa, pressurize 50min.
6. the preparation method of the metallurgical matrix material of corrosion-resistant noble metal powder according to claim 4, it is characterized in that: in step 3), sintering temperature is 1050 DEG C, sintering time is 40min.
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Citations (7)
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| JPS57161048A (en) * | 1981-03-31 | 1982-10-04 | Hitachi Metals Ltd | Thin alloy strip with high permeability |
| JPS6151024B2 (en) * | 1984-01-24 | 1986-11-07 | Tohoku Metal Ind Ltd | |
| US5512080A (en) * | 1992-11-27 | 1996-04-30 | Toyota Jidosha Kabushiki Kaisha | Fe-based alloy powder adapted for sintering, Fe-based sintered alloy having wear resistance, and process for producing the same |
| CN104328343A (en) * | 2014-10-23 | 2015-02-04 | 苏州莱特复合材料有限公司 | Compression-resistance powder metallurgical gear material and preparation method thereof |
| CN104372244A (en) * | 2014-10-29 | 2015-02-25 | 苏州莱特复合材料有限公司 | Nitrogen-phosphorus mixed corrosion-resistant alloy material and applications thereof |
| CN104388822A (en) * | 2014-10-31 | 2015-03-04 | 苏州莱特复合材料有限公司 | Powder metallurgy material for brake pads and preparation method thereof |
| CN104674107A (en) * | 2014-12-26 | 2015-06-03 | 昆山迪赛斯恩模具设计有限公司 | Cast iron die material |
-
2015
- 2015-08-31 CN CN201510541948.2A patent/CN105154767A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57161048A (en) * | 1981-03-31 | 1982-10-04 | Hitachi Metals Ltd | Thin alloy strip with high permeability |
| JPS6151024B2 (en) * | 1984-01-24 | 1986-11-07 | Tohoku Metal Ind Ltd | |
| US5512080A (en) * | 1992-11-27 | 1996-04-30 | Toyota Jidosha Kabushiki Kaisha | Fe-based alloy powder adapted for sintering, Fe-based sintered alloy having wear resistance, and process for producing the same |
| CN104328343A (en) * | 2014-10-23 | 2015-02-04 | 苏州莱特复合材料有限公司 | Compression-resistance powder metallurgical gear material and preparation method thereof |
| CN104372244A (en) * | 2014-10-29 | 2015-02-25 | 苏州莱特复合材料有限公司 | Nitrogen-phosphorus mixed corrosion-resistant alloy material and applications thereof |
| CN104388822A (en) * | 2014-10-31 | 2015-03-04 | 苏州莱特复合材料有限公司 | Powder metallurgy material for brake pads and preparation method thereof |
| CN104674107A (en) * | 2014-12-26 | 2015-06-03 | 昆山迪赛斯恩模具设计有限公司 | Cast iron die material |
Non-Patent Citations (1)
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| 李元元等: "《新型材料科学与技术 金属材料卷》", 30 September 2012, 广州：华南理工大学出版社 * |
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