CN1291054C - Precipitation strengthened high nickel iron ratio tungsten alloy material and processing technology - Google Patents
Precipitation strengthened high nickel iron ratio tungsten alloy material and processing technology Download PDFInfo
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- CN1291054C CN1291054C CN 02129378 CN02129378A CN1291054C CN 1291054 C CN1291054 C CN 1291054C CN 02129378 CN02129378 CN 02129378 CN 02129378 A CN02129378 A CN 02129378A CN 1291054 C CN1291054 C CN 1291054C
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Abstract
The present invention relates to a tungsten-alloy material with high comprehensive performance and a treating technology thereof. The material comprises the following ingredients: 85% to 97% of tungsten, and nickel and ferrum as the rest. The ratio of the nickel to the ferrum is from 8:2 to 9.5:0.5. The treating technology comprises solid-dissolving sudden-cold treatment, deformation processing and pre-strain ageing. In the technology of the solid-dissolving sudden-cold treatment, solid-dissolving treatment is carried out for 1 to 3 hours at 1100 DEG C to 1300 DEG C in a heat-treating furnace under the protection of nitrogen, and then sudden-cold treatment in water is carried out. In the deformation processing, deformation is realized by rolling or rotary swaging, and deformation quantity is from 5% to 20%. In the pre-strain ageing, ageing is carried out for 12 to 36 hours at 650 to 950 DEG C. The material has the advantages of high strength and high ductility.
Description
Technical field:
The invention belongs to metal material field, specially referring to a kind of tungsten-Ni-Fe is the high density tungsten alloy material.
Background technology
Tungsten-Ni-Fe is that high density tungsten alloy is that a kind of W content (massfraction) is between 85%～97%, the two-phase composite material for preparing through liquid phase sintering by the mixing pressed compact of tungsten W, nickel, iron Fe three constituent element powder, this material has the high and intensity advantages of higher of density, is mainly used in fields such as national defense and military industry, electric heating processing, sports apparatus and radiation shielding material.For satisfying harsh day by day service requirements, the high strength of tungstenalloy and high tenacity are the main performance index of pursuing in production and the scientific research always.At present, tungsten-Ni-Fe is that high density tungsten alloy all adopts 7/3 or 1/1 Ni/Fe than (relative mass mark ratio) both at home and abroad, its major cause is: according to tungsten-Ni-Fe ternary phase diagrams and actual comparative study, when W content (massfraction) be 85%～97% and Ni/Fe than between 4/6～8/2 the time, do not have intermetallic compound to separate out in the tungstenalloy that obtains under the slow cooling condition after the liquid phase sintering, have preferable performance; When Ni/Fe than less than 4/6 the time since Ni very little alloy can not realize sintering densification well; And after the Ni/Fe ratio is greater than 8/2, will separate out fragility WNi in the alloy under the slow cooling condition behind the sintering
4Phase also is called the β phase, and the mechanical property of alloy is reduced, and especially the plasticity of alloy reduces significantly.
Summary of the invention:
The object of the present invention is to provide a kind of tungsten alloy material with higher comprehensive performance, this material has the high-intensity high toughness that also keeping simultaneously.In fact, when Ni/Fe than greater than 8/2 the time, because the raising of sintering activating element nickel content, the wettability of relative tungsten particle of boning is better, and sintering densification speed is higher, and the sintering defective is few, more help shortening sintering time and obtain fine grained texture, unique shortcoming is to reduce with the solid solubility of tungsten in the annealing process behind the sintering, separates out the β phase in bonding in mutually near 970 ℃, causes alloy plasticity to reduce.But, it should be noted that separating out of β phase is the precipitation process of a supersaturated solid solution, can control its precipitation behavior by solid solution aging fully, make it the bonding mutually in disperse separate out.Therefore, under the solid solution aging condition, adopt and be higher than 8/2 high Ni/Fe ratio, not only help obtaining fine grained texture, but also help utilizing β phase dispersion-strengthened bonding phase, satisfy the mechanical property matching conditions between bonding phase and the tungsten particle, alloy is further strengthened, thus preparation intensity and the good tungstenalloy of toughness tool.
A kind of high nickel iron ratio tungsten alloy material of precipitation strength is characterized in that the prescription of material is: the content of tungsten (massfraction) is between 85%～97%, and all the other are nickel and iron, and described ferronickel relative mass mark is than between 8/2～9.5/0.5.
Aforesaid high nickel iron ratio tungsten alloy material treatment process is: solid solution chilling processing → deformation processing → strain-aging.The technology that the solid solution chilling is handled is 1100 ℃～1300 ℃ following solution treatment 1～3 hour in the nitrogen protection heat treatment furnace, immediately chilling in water; Described deformation processing is rolling or the distortion of swaging, and deflection is 5%～20%; Described strain-aging is 650～950 ℃ of following timeliness 12～36 hours.
Treatment process of the present invention is intended to suppress non-dispersivity β separates out mutually, make its intergranular precipitation the bonding of tungstenalloy mutually in, reach the effect of highly malleablized tungstenalloy.Its characteristics are by the thermal treatment of solid solution chilling, make the non-dispersivity β that separates out in the annealing process behind the sintering be dissolved in bonding mutually again and form supersaturated solid solution in mutually; Carry out deformation processing then, make and produce a large amount of lattice defects in the tungstenalloy; Quicken the intergranular precipitation of β in boning mutually by strain aging at last.
Compared with prior art, the invention has the advantages that:
(1) density of the high nickel iron ratio tungsten alloy material of employing the present invention preparation is higher, and defective still less;
(2) adopt the high nickel iron ratio tungsten alloy material of the present invention's preparation to have the high-intensity while, can also keep higher plasticity, have excellent comprehensive performances.
Embodiment:
The content of tungsten (massfraction) is 89～97% in the tungsten alloy material of the present invention, and all the other are nickel and iron, and ferronickel relative mass mark is than between 8/2～9.5/0.5.Tungstenalloy adopts the preparation of powder metallurgy liquid-phase sintering process.
Its concrete technical process is:
1, raw material powder was done in mixer mixed 8～12 hours, composition is mixed;
2, the press forming in the liquid isostatic pressing machine of the powder that mixes being packed in the rubber finger sleeve, pressing pressure is 140MPa～190MPa, 30 seconds～45 seconds dwell time;
3, with pressed compact thermal sintering in the molybdenum filament push rod furnace of hydrogen shield, sintering temperature is 1450 ℃～1500 ℃, is incubated 20～60 minutes;
4, the material behind the sintering carries out the dehydrogenation processing in vacuum oven, and the dehydrogenation temperature is 1100 ℃～1300 ℃, is incubated 1～3 hour;
5, then in the nitrogen protection heat treatment furnace at 1100 ℃～1300 ℃ following solution treatment 1～3 hour, immediately chilling in water;
6, carry out the rolling of 5%～20% deflection or the distortion of swaging;
7, the tungsten alloy material after will being out of shape at last was 650～950 ℃ of following strain agings 12～36 hours.
Table 1 has provided several preferred embodiments of the present invention:
Table 1 preferred embodiment
| Preferred embodiment | Embodiment 1 | Embodiment 2 | Embodiment 3 | |
| The massfraction of tungsten | 93％ | 93％ | 93％ | |
| Ferronickel relative mass mark ratio | 8.5/0.5 | 9/1 | 9.5/0.5 | |
| Solid solution emergency cooling process parameter | Temperature (℃) | 1100 | 1200 | 1300 |
| Soaking time (h) | 3 | 2 | 1 | |
| Deflection (%) | 5 | 10 | 20 | |
| The strain-aging parameter | Aging temp (℃) | 950 | 800 | 600 |
| Aging time (h) | 12 | 24 | 36 | |
| Tensile strength (MPa) | 1090 | 1180 | 1350 | |
| Unit elongation (%) | 28 | 20 | 12 | |
In sum, method of the present invention can prepare intensity and the good tungsten alloy material of toughness tool.
Claims (1)
1. the treatment process of the high nickel iron ratio tungsten alloy material of a precipitation strength, its component comprises tungsten, nickel, iron, the massfraction that it is characterized in that tungsten in the described component is between 85%～97%, and all the other are nickel and iron, and ferronickel relative mass mark is than between 8/2～9.5/0.5; Treatment process is solid solution chilling processing → deformation processing → strain-aging, and the solid solution chilling is handled: in the nitrogen protection heat treatment furnace in 1100 ℃～1300 ℃ following solution treatment 1～3 hour, immediately chilling in water; Deformation processing: rolling or 5%～20% the deflection of swaging; Strain-aging: aging temp is 650～950 ℃, and aging time is 12～36 hours.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02129378 CN1291054C (en) | 2002-09-06 | 2002-09-06 | Precipitation strengthened high nickel iron ratio tungsten alloy material and processing technology |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02129378 CN1291054C (en) | 2002-09-06 | 2002-09-06 | Precipitation strengthened high nickel iron ratio tungsten alloy material and processing technology |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1414128A CN1414128A (en) | 2003-04-30 |
| CN1291054C true CN1291054C (en) | 2006-12-20 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 02129378 Expired - Fee Related CN1291054C (en) | 2002-09-06 | 2002-09-06 | Precipitation strengthened high nickel iron ratio tungsten alloy material and processing technology |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100590210C (en) * | 2007-09-19 | 2010-02-17 | 中国科学院金属研究所 | Technological process for improving twin boundary amount in gamma' precipitation strengthened type ferrous alloy |
| CN102717078A (en) * | 2012-05-10 | 2012-10-10 | 株洲乐泰金属粉末制品有限公司 | Process of tungsten alloy rotary swaging rod with high density and high performance |
| CN106834856B (en) * | 2017-01-16 | 2018-11-16 | 西安华山金属制品有限公司 | A kind of W-Ni-Fe-Y-ZrB2Heterogeneous alloy material and preparation method thereof |
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2002
- 2002-09-06 CN CN 02129378 patent/CN1291054C/en not_active Expired - Fee Related
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Granted publication date: 20061220 Termination date: 20090906 |