CN100455687C - Process of making zinc-base alloy wire and rod with high strength and high toughness - Google Patents
Process of making zinc-base alloy wire and rod with high strength and high toughness Download PDFInfo
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- CN100455687C CN100455687C CNB2006101551257A CN200610155125A CN100455687C CN 100455687 C CN100455687 C CN 100455687C CN B2006101551257 A CNB2006101551257 A CN B2006101551257A CN 200610155125 A CN200610155125 A CN 200610155125A CN 100455687 C CN100455687 C CN 100455687C
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Abstract
The present invention relates to process of making zinc-base alloy wire and rod with high strength and high toughness. The production process includes the steps of providing zinc-base alloy material with Al content not less than 10 wt%, smelting, heat preservation and extruding at 300-450 deg.c, drawing, heat treatment at 150-300 deg.c for 30-120 min, and quenching. The production process can obtain zinc-base alloy wire and rod of different sizes for producing various mechanical parts, such as screw, nut, pull rod, wire, etc.
Description
Technical field
The present invention relates to the zinc-base alloy wire or the bar manufacture method of the manufacture method of a kind of zinc-base alloy wire or bar, particularly a kind of high-intensity high-tenacity.
Background technology
Zinc base alloy is a kind of important non-ferrous metal alloy, have corrosion-resistant, easily processing, characteristic such as raw material is cheap is widely used in fields such as machinofacture and anticorrosives.The fusing point of zinc base alloy is low, good fluidity, and the product of general zinc base alloy adopts extrusion process, promptly by the direct machine-shaping of liquid state, makes the different shape complex devices.Yet, the process of cooling of the Zn-base alloy that the employing extrusion process is made is inhomogeneous, make alloy be in the thermodynamics nonequilibrium situations, in use can have the processes such as precipitation decomposition of supersaturated solid solution, have low thermostability and low dimensional stability; It is lower then to show as intensity on macroscopic view, and the face shrinking percentage is lower, and unit elongation generally is lower than 15%, be that toughness is lower, make material in follow-up mechanical processing process, have a lot of insoluble problems, thereby limited its application at many other fields.
High Strength Zinc-Alloy is a kind of novel material of development in recent years, and the weight percent of aluminium has obtained certain raising generally greater than 10% by its strength of materials of improvement of filling a prescription in its prescription.But with regard to its preparation method, most research work still is confined to casting technique, makes that the unit elongation of material is low, has had a strong impact on the widespread use of high strength zinc base alloy.Show by Zn-Al-Cu-Sb-Mg zinc base alloy number of research projects that as the U.S. EasternAlloys company limited tensile strength of casting attitude zinc-base alloy wire or bar can reach 480Mpa, and maximum unit elongation has only 14% to high alumina; People such as Gen Haoren make the intensity of alloy wire or bar can reach 500Mpa to the casting zinc-base heat treatment of alloy process modification that the trade mark is respectively ZA-27 and ZAS35 type, and maximum unit elongation also has only 11.5% (to see Materials Science; EngineeringA, 316 (2001) 109-114).G.Purcek etc. are the alloy (Al:10% of ZA-12 to the trade mark, Cu:0.84%, Mg:0.25%, Zn: surplus, all be weight percentage) the composite measurement result show that its intensity is 245MPa, unit elongation is 3%, the face shrinking percentage is 5%, and Vickers' hardness is 100 (seeing Journal of Materials ProcessingTechnology.1699 (2005) 242-248).
High performance alloy often has the excellent comprehensive use properties, the disappearance of any performance all can reduce the Application Areas of material greatly, the unit elongation of alloy and face shrinking percentage play conclusive effect to its follow-up part and finished product processing, therefore, on the basis of existing prescription, be necessary to develop the toughness that a kind of new manufacture method improves material.
Summary of the invention
The object of the present invention is to provide a kind of zinc-base alloy wire or bar manufacture method with high-intensity high-tenacity.
Technical scheme of the present invention is: the zinc-base alloy wire of this high-intensity high-tenacity or bar manufacture method, and its production process is: zinc base alloy raw material-melting-insulation and the extruding-drawing-thermal treatment-quenching of aluminium content 〉=10wt% are provided; Wherein, insulation and extrusion temperature are in 300～450 ℃ of scopes; Described drawing process can be single track or multiple tracks drawing process, and wherein the sectional area deflection of the material that causes of per pass drawing process is in 5%～50% scope; Heat treated temperature is in 150～300 ℃ of scopes, and the time is between 30～120min.
The present invention uses the means of plastic forming of metals, the method that adopts extruding and drawing to combine makes zinc base alloy produce very big viscous deformation, in thinning microstructure, produce a large amount of dislocations, in deformation process, stop the slippage of dislocation, the intensity of its alloy and toughness are improved simultaneously.In low temperature heat treatment, by the appearance of the new ternary compound of phase change induction, increase the content of equilibrium state tissue, and make the further refinement of matrix reach the high-intensity while of maintenance to improve unit elongation greatly.
The zinc-base mother alloy that the present invention uses uses traditional induction melting, punching block or semicontinuous casting.In 300～450 ℃ of temperature ranges, adopt the method for extruding, the zinc-base mother alloy is made stock greater than finished product wire rod or bar.The alloy stock is adopted drawing and heat treatment phase bonded method, make the wire rod or the bar of desired size.Quenching behind the wire rod that the process drawing is later or bar process low temperature (150～300 ℃) thermal treatment 30～120min to keep high strength to have good unit elongation again, and wherein, the quenching technology process is preferably shrend.
The zinc-base alloy wire of high-intensity high-tenacity of the present invention or bar manufacture method can also have annealing process between described multiple tracks drawing process, annealing temperature is 350～420 ℃, and annealing time is 100～140min.
Use the zinc-base alloy wire of the high-intensity high-tenacity that technological line of the present invention obtains or the maximum tensile strength of bar can reach 600MPa, maximum unit elongation is 22%.Cutting test shows that cutting is shaped as discontinuous sheet, shows to have good machinability.Cold punching test shows, becomes diameter 9mm bar that cracking phenomena does not take place the zinc-base alloy wire cold punching of the present invention of diameter 6mm, and the amount of finish of cold punching can reach 50%, shows violent cold working such as can being used for cold forging and cold punching.
The invention has the advantages that: use method of the present invention, the zinc-base alloy wire or the bar that can be had the virtually any size of high strength and high tenacity simultaneously, the tensile strength of its wire rod and bar, Vickers' hardness, unit elongation, face shrinking percentage all improve a lot.Its wire rod and bar can be processed into various mechanical component, screw for example, nut, pull bar and lead etc.
Description of drawings
The metallograph of zinc base alloy after 400 ℃ of extruding that Fig. 1 is ZA-27 for the Comparative Examples trade mark of the present invention.
After Fig. 2 is the zinc base alloy process drawing of ZA-27 for the embodiment of the invention 1 trade mark, the metallograph of 200 ℃ of thermal treatment shrends after 1 hour.
Embodiment
Comparative Examples
According to the trade mark is zinc base alloy prescription (Al:26.5%, Cu:2.2%, the Mg:0.05% of ZA-27, Zn: surplus all is weight percentage) material of batching, adopt traditional induction melting, after 400 ℃ of insulations in hour, be squeezed into the bar of diameter 12.5mm.As seen from Figure 1 because the extruding attitude is not passed through follow-up drawing and low temperature heat-treatment process, organize thicker, the visible chequered with black and white alloy phase structure of naked eyes; The unit elongation of this material has only 3% after tested.
Embodiment 1
According to the trade mark is zinc base alloy prescription (Al:26.5%, Cu:2.2%, the Mg:0.05% of ZA-27, Zn: surplus all is weight percentage) material of batching, adopt traditional induction melting, after 300 ℃ of insulations in hour, be squeezed into the bar of diameter 12.5mm; Pull to 11mm through 1 time, after 400 ℃ of annealing in two hours, pull to 9.5mm the 2nd time,, pull to 8.1mm, through 200 ℃ of thermal treatment shrends after 1 hour, obtain required wire rod at last for the 3rd time again through after 400 ℃ of annealing in two hours.After tested, wire rod tensile strength is 420MPa, and Vickers' hardness is 118, and unit elongation is 22%, and the face shrinking percentage is 62%.As shown in Figure 2, with respect to the alloy of Comparative Examples, after the alloy process drawing and low-temperature heat treatment of this extruding attitude, organize obvious refinement, on the metallograph of 100 times of amplifications, be difficult to differentiate phase constitution, unit elongation can obviously improve after this showed structure refinement.
Embodiment 2
According to the trade mark is the zinc base alloy prescription (Al:28.5% of ZA-27, Cu:2.0%, Mg:0.03%, Zn: surplus all is weight percentage) material of batching, adopt traditional induction melting, after 400 ℃ of half hour insulations, be squeezed into the bar of 12.5mm diameter, after once pulling to 10.3mm, the sectional area deflection is 50%, in 150 ℃ of thermal treatment shrends after 60 minutes thereafter.2 of embodiment adopt one drawing process as different from Example 1, do not have annealing process, and the extrusion temperature difference.This bar tensile strength is 460MPa, and Vickers' hardness is 128, and unit elongation is 20%, and the face shrinking percentage is 60%.
Embodiment 3
According to the trade mark is the zinc base alloy prescription (Al:10% of ZA-12, Cu:1.0%, Mg:0.05%, Zn: surplus all is weight percentage) material of batching, adopt traditional induction melting, through being hot extruded into the bar of diameter 8mm after 450 ℃ of half hour insulations, through each 5% sectional area deformation rate, be drawn into the wire rod of diameter 7mm 6 times, through shrend after 300 ℃ of half hour thermal treatments.The prescription (trade mark) of different with embodiment 1,2 is alloy changes, and extrusion temperature is also different with last thermal treatment temp.This wire rod tensile strength is 408MPa, and Vickers' hardness is 105, and unit elongation is 15%, face shrinking percentage 58%.
Embodiment 4
According to document Materials Science ﹠amp; Engineering A, zinc base alloy prescription (Al:35%, Cu:1.6%, Mg:0.05% that the disclosed Zn-Al-Cu-Sb-Mg of 316 (2001) 109-114 forms, Sb:1%, Zn: surplus all is weight percentage) material of batching, adopt traditional induction melting, after 380 ℃ of half hour insulations, be squeezed into the wire rod of diameter 8mm, pass through each 30% sectional area deflection, be drawn into the wire rod of diameter 6mm.In the middle of wherein each drawing through 400 ℃, 2 hours stress relieving, with the wire rod after the drawing through the thermal treatment of 250 ℃ of half hours after shrend.With embodiment 1,2,3 different be the prescription difference of zinc base alloy, deflection and thermal treatment temp are also different.This wire rod tensile strength is 410Mpa, and Vickers' hardness is 108, and unit elongation is 18%, and the face shrinking percentage is 55%.
The foregoing description is used for explaining the present invention, rather than limits the invention, so long as adopt the zinc base alloy raw material of aluminium content 〉=10wt%, according to manufacture method of the present invention, can obtain the wire rod or the bar of high-intensity high-tenacity.In spirit of the present invention and claim protection domain, any modification and change to the present invention makes all fall into protection scope of the present invention.
Claims (3)
1, a kind of zinc-base alloy wire of high-intensity high-tenacity or bar manufacture method, its production process is: zinc base alloy raw material-melting-insulation and the extruding-drawing-thermal treatment-quenching of aluminium content 〉=10wt% are provided; Wherein, insulation and extrusion temperature are in 300～450 ℃ of scopes; Described drawing process is single track or multiple tracks drawing process, and the sectional area deflection of per pass drawing process is between 5%～50%; Heat treated temperature is in 150～300 ℃ of scopes, and the time is between 30～120min.
2, the zinc-base alloy wire of high-intensity high-tenacity according to claim 1 or bar manufacture method is characterized in that: also have annealing process between described multiple tracks drawing process, annealing temperature is 350～420 ℃, and annealing time is 100～140min.
3, the zinc-base alloy wire of high-intensity high-tenacity according to claim 1 or bar manufacture method, it is characterized in that: described quenching refers to shrend.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102051551A (en) * | 2011-01-14 | 2011-05-11 | 南京信息工程大学 | Heat-resisting zinc alloy material and preparation method thereof |
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| CN101698912B (en) * | 2009-11-06 | 2011-08-17 | 湖南华康新材料有限公司 | Copper alloy substitute material high-performance deformation zinc base alloy suitable for continuous extrusion |
| CN102011027A (en) * | 2010-04-23 | 2011-04-13 | 佛山市南海区大沥国东铜材制造有限公司 | Lead-free free-cutting zinc alloy as well as preparation method and application thereof |
| CN102463271B (en) * | 2010-11-08 | 2014-01-08 | 北京有色金属研究总院 | Production method of zinc base alloy thin-wall pipe |
| CN102051552B (en) * | 2011-01-14 | 2012-02-22 | 南京信息工程大学 | High-toughness zinc alloy material and preparation method thereof |
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| CN102703762B (en) * | 2012-01-13 | 2014-06-11 | 江苏麟龙新材料股份有限公司 | Ce-Nd-containing zinc-aluminum alloy wire and production method thereof |
| CN102703763B (en) * | 2012-01-13 | 2014-06-11 | 江苏麟龙新材料股份有限公司 | Multielement zinc-aluminum alloy wire and manufacturing method thereof |
| CN102703759A (en) * | 2012-01-13 | 2012-10-03 | 江苏麟龙新材料股份有限公司 | La-Ce-containing zinc-aluminum alloy wire and production method thereof |
| CN102703758B (en) * | 2012-01-13 | 2014-06-11 | 江苏麟龙新材料股份有限公司 | La-Nd-containing zinc-aluminum alloy wire and production method thereof |
| CN103924179B (en) * | 2014-03-28 | 2017-01-18 | 上海龙烁焊材有限公司 | Heat treatment method of zinc-aluminum rolled strip |
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| CN104805331B (en) * | 2015-04-22 | 2017-03-15 | 山东省科学院新材料研究所 | A kind of engineering machinery U-shaped material of the wear-resisting extruded zinc alloy of high-strength and high ductility and preparation method thereof |
| CN117137543B (en) * | 2023-11-01 | 2024-02-02 | 山东瑞安泰医疗技术有限公司 | Degradable plugging device and preparation method and application thereof |
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| CN1226606A (en) * | 1999-02-12 | 1999-08-25 | 天津德塔超塑技术发展有限公司 | High strength wear-resistant metal cylinder and its processing method and apparatus |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1226606A (en) * | 1999-02-12 | 1999-08-25 | 天津德塔超塑技术发展有限公司 | High strength wear-resistant metal cylinder and its processing method and apparatus |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102051551A (en) * | 2011-01-14 | 2011-05-11 | 南京信息工程大学 | Heat-resisting zinc alloy material and preparation method thereof |
| CN102051551B (en) * | 2011-01-14 | 2012-06-20 | 南京信息工程大学 | Heat-resisting zinc alloy material and preparation method thereof |
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Effective date of registration: 20091120 Address after: Zhejiang city of Ningbo province Yinzhou District Yunlong Town of Taiping Bridge Patentee after: Ningbo Powerway Alloy Materials Co., Ltd. Address before: Yunlong Town, Ningbo, Zhejiang, Yinzhou District Patentee before: Bowei Group Co., Ltd., Ningbo |