CN104233021B - A kind of strong mechanical performance and the corrosion resisting alloy of good mechanical processing characteristics - Google Patents
A kind of strong mechanical performance and the corrosion resisting alloy of good mechanical processing characteristics Download PDFInfo
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Abstract
nullThe present invention relates to field of aluminum alloys，A kind of strong mechanical performance and the corrosion resisting alloy of good mechanical processing characteristics,This alloy is made up of following component: Mg4.25 4.95wt%、Mn0.48‑0.8wt%、Cr0.15‑0.25wt%、Si0.005‑0.15wt%、Fe 0.005‑0.15 wt%、Cu 0.01‑0.04 wt%、Zn 0.006‑0.2 wt%、Ti 0.10‑0.15 wt%，Surplus is Al and inevitable impurity,The invention has the beneficial effects as follows: aluminium alloy of the present invention is by changing alloying element kind and content，Crystal grain in the alloy of the present invention is more refined，Organize more uniform，Thus improve the machining property of alloy，And by controlling Al、Zn、Mg、The content of Cu greatly strengthen its requirement of strength，The addition of Mn substantially increases the corrosion resistance of alloy，And Mn is controlled at 0.48 0.8wt% by the present invention，I.e. eliminate the impression of unnecessary Fe，Also improve corrosion resistance，To sum up，The strong mechanical performance of present invention alloy by the control realization to the selection of composition and proportioning and good machining property，Also the alloy the realized requirement to corrosion resistance.
Description
Technical field
The present invention relates to field of aluminum alloys, a kind of strong mechanical performance and the corrosion resisting alloy of good mechanical processing characteristics.
Background technology
The density of fine aluminium is little (ρ=2.7g/cm3), about the 1/3 of ferrum, fusing point low (660 DEG C), aluminum is face-centred cubic structure, therefore has the highest plasticity (δ: 32 ~ 40%, ψ: 70 ~ 90%), it is easy to processing, can be made into various section bar, sheet material, and corrosion resistance is good；But the intensity of fine aluminium is the lowest, annealed condition
σ b value is about 8kgf/mm2, therefore should not make structural material.By long-term production practices and scientific experiments, people are gradually to add alloying element and to use the methods such as heat treatment to carry out reinforced aluminum, this has just obtained a series of aluminium alloy, aluminium alloy is a most widely used class non-ferrous metal structural material in industry, widely applies in Aeronautics and Astronautics, automobile, machine-building, boats and ships and chemical industry.Along with science and technology and the developing rapidly of industrial economy, increasing to the demand of Welded structural member, aluminium alloy density is low, but strength ratio is higher, near or above high-quality steel, plasticity is good, various section bar can be processed into, having excellent electric conductivity, heat conductivity and a corrosion stability, industrial be widely used, usage amount is only second to steel.
But different demands is different for the performance requirement of aluminium alloy, such as high-strength aluminum alloy, high toughness Al-alloy, anticorrosion aluminium, easy welding aluminum alloy etc. etc., and for for dredging pipeline, barnacle, the aluminium alloy of fuel storage tank, environment due to its practicality, it is firstly the need of high mechanical property, it is secondary has good corrosion resistance and to be prone to processing, and the aluminium alloy that can simultaneously meet conditions above at present does not also occur.
Summary of the invention
The goal of the invention of the present invention is for above weak point of the prior art, it is provided that a kind of corrosion resisting alloy with strong mechanical performance and good mechanical processing characteristics.
The present invention is achieved by the following technical solutions:
A kind of strong mechanical performance and the corrosion resisting alloy of good mechanical processing characteristics, this alloy is made up of following component: Mg4.25-4.95wt%, Mn0.48-0.8wt%, Cr0.15-0.25wt%, Si0.005-0. 15wt%, Fe 0.005-0. 15 wt%, Cu 0.01-0.04 wt%, Zn 0.006-0.2 wt%, Ti 0.10-0.15 wt%, and surplus is Al and inevitable impurity.
Above-mentioned alloy is made up of following component: Mg4.45-4.65wt%, Mn0.58-0.7wt%, Cr0.15-0.25wt%, Si0.008-0. 08wt%, Fe 0.008-0.08 wt%, Cu 0.02-0.03 wt%, Zn 0.010-0.10wt%, Ti 0.12-0.14 wt%, and surplus is Al and inevitable impurity.
Optimizing, above-mentioned alloy is made up of following component: Mg4.55wt%, Mn0.62wt%, Cr0.20wt%, Si0.010wt%, Fe 0.010 wt%, Cu 0.015 wt%, Zn 0.05wt%, Ti 0.13 wt%, and surplus is Al and inevitable impurity.
Present component scope is narrow, it is to avoid crosses great fluctuation process due to chemical composition and causes interior tissue uneven and mechanical property scattered error is excessive；nullFe adds according to essential element in this alloy，Make Fe and Mg、Si forms hardening constituent，Mn is main adding elements in this alloy，Mainly for neutralizing unnecessary Fe,Thus reduce the harmful effect of Fe，And crystal grain thinning，And Mn is the element in order to obtain required corrosion resistance and intensity level is added，It should not be the most unsuitable the most very few，Add Cu element，A small amount of Cu and main strengthening composition Si、Mg combines，Mechanical property is made to significantly improve，Mechanical property can be made close to the performance of duralumin，Aluminum is simultaneously introduced zinc and magnesium，Form hardening constituent Mg/Zn2，Alloy is produced obvious invigoration effect，Increase tensile strength and yield strength，Add copper on the basis of Al-Zn-Mg simultaneously，Form Al-Zn-Mg-Cu system alloy，Base strengthening effect is maximum in all aluminium alloys.
Above-mentioned a kind of strong mechanical performance and the preparation method of the corrosion resisting alloy of good mechanical processing characteristics, it comprises the steps: alloy cast ingot, Extrusion-quenched, tension force stretching and Ageing Treatment, takes a sample to check, packs.
Above-mentioned alloy cast ingot includes melting and refine, smelting temperature 560-760 DEG C, steadily stirs, forbid being involved in molten metal surface scum when furnace charge melts about about 90%；Every heat carries out 2-5 furnace bottom stirring in fusion process；Body agitated uniformly after sample immediately, carry out on-the-spot sample analysis, probe temperature must not be less than 730 DEG C；Carry out refine with furnace charge, according to the result of sample analysis, calculate the magnitude of recruitment of material；Sample analysis for the second time, stands 10 minutes, casting.
Optimizing, above-mentioned smelting temperature is 730-760 DEG C.
The technical parameter of above-mentioned Extrusion-quenched is: ingot casting is quickly charged with in recipient after being heated to 330-350 DEG C, extrusion temperature 330 DEG C-350 ± 5 DEG C, extrusion speed 3 ± 0.5m/min, hardening heat 330-350 ± 5 DEG C, quenching velocity 250～280 DEG C/minute.
Mentioned strain stretching with aging treatment process parameter is: extensibility 1.5～1.7%, aging temp 150-175 DEG C, metal heat preservation 8-15 hour, goes out aging furnace.
The invention has the beneficial effects as follows: aluminium alloy of the present invention is by changing alloying element kind and content, crystal grain in the alloy of the present invention is more refined, organize more uniform, thus improve the machining property of alloy, and by controlling Al, Zn, Mg, the content of Cu greatly strengthen its requirement of strength, the addition of Mn substantially increases the corrosion resistance of alloy, and Mn is controlled at 0.48-0.8wt% by the present invention, i.e. eliminate the impression of unnecessary Fe, also improve corrosion resistance, to sum up, the strong mechanical performance of present invention alloy by the control realization to the selection of composition and proportioning and good machining property, also the alloy the realized requirement to corrosion resistance.
Detailed description of the invention
Below in conjunction with specific embodiment, the present invention will be further described, and those skilled in the art can be better understood by the present invention, but and is not so limited the present invention.
The preparation method of alloy of the present invention is as follows: alloy cast ingot, Extrusion-quenched, tension force stretching and Ageing Treatment, takes a sample to check, pack.
Alloy cast ingot includes melting and refine, smelting temperature 730-760 DEG C, steadily stirs, forbid being involved in molten metal surface scum when furnace charge melts about about 90%；Every heat carries out 2-5 furnace bottom stirring in fusion process；Body agitated uniformly after sample immediately, carry out on-the-spot sample analysis, probe temperature must not be less than 730 DEG C；Carry out refine with furnace charge, according to the result of sample analysis, calculate the magnitude of recruitment of material；Sample analysis for the second time, stands 10 minutes, casting.
The technical parameter of Extrusion-quenched is: ingot casting is quickly charged with in recipient after being heated to 330-350 DEG C, extrusion temperature 330 DEG C-350 ± 5 DEG C, extrusion speed 3 ± 0.5m/min, hardening heat 330-350 ± 5 DEG C, quenching velocity 250～280 DEG C/minute.
Tension force stretching and aging treatment process parameter be: extensibility 1.5～1.7%, aging temp 150-175 DEG C, metal heat preservation 8-15 hour, goes out aging furnace.
Without specified otherwise, following embodiment all uses this method to produce.
Embodiment 1
A kind of strong mechanical performance and the corrosion resisting alloy of good mechanical processing characteristics, being made up of following component: Mg4.45wt%, Mn0.60wt%, Cr0.18wt%, Si0.010wt%, Fe 0.010 wt%, Cu 0.02 wt%, Zn 0.010wt%, Ti 0.12 wt%, surplus is Al and inevitable impurity.
Embodiment 2
A kind of strong mechanical performance and the corrosion resisting alloy of good mechanical processing characteristics, being made up of following component: Mg4.55wt%, Mn0.62wt%, Cr0.20wt%, Si0.010wt%, Fe 0.010 wt%, Cu 0.015 wt%, Zn 0.05wt%, Ti 0.13 wt%, surplus is Al and inevitable impurity.
Embodiment 3
A kind of strong mechanical performance and the corrosion resisting alloy of good mechanical processing characteristics, be made up of following component: Mg4.65wt%, Mn0.58-0.7wt%, Cr0.25wt%, Si0.07wt%, Fe
0.07 wt%, Cu 0.03 wt%, Zn 0.10wt%, Ti 0.14 wt%, surplus is Al and inevitable impurity.
Above-described embodiment 1-3 gained alloy is placed individually in saline immersion 60 days, observes surface corrosion and count.
Claims (1)
1. a strong mechanical performance and the corrosion resisting alloy of good mechanical processing characteristics, it is characterized in that: this alloy is made up of following component: Mg4.55wt%, Mn0.62wt%, Cr0.20wt%, Si0.010wt%, Fe 0.010 wt%, Cu 0.015 wt%, Zn 0.05wt%, Ti 0.13 wt%, surplus is Al and inevitable impurity；
The preparation method of described corrosion resisting alloy, it comprises the steps: alloy cast ingot, Extrusion-quenched, tension force stretching and Ageing Treatment, takes a sample to check, packs；
Described alloy cast ingot includes melting and refine, smelting temperature 730-760 DEG C, steadily stirs, forbid being involved in molten metal surface scum when furnace charge melts about 90%；Every heat carries out 2-5 furnace bottom stirring in fusion process；Melt agitated uniformly after sample immediately, carry out on-the-spot sample analysis, probe temperature must not be less than 730 DEG C；Carry out refine with furnace charge, according to the result of sample analysis, calculate the magnitude of recruitment of material；Sample analysis for the second time, stands 10 minutes, casting；
The technical parameter of described Extrusion-quenched is: ingot casting is quickly charged with in recipient after being heated to 330-350 DEG C, extrusion temperature 330 DEG C-350 DEG C, extrusion speed 3 ± 0.5m/min, hardening heat 330 DEG C-350 DEG C, quenching velocity 250～280 DEG C/minute；
Described tension force stretching and aging treatment process parameter be: extensibility 1.5～1.7%, aging temp 150-175 DEG C, metal heat preservation 8-15 hour, goes out aging furnace.
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| CN101538668A (en) * | 2009-04-28 | 2009-09-23 | 中铝河南铝业有限公司 | Production process of aluminum alloy hot rolling medium plate |
| CN101649406B (en) * | 2009-08-31 | 2011-06-29 | 郑州明泰实业有限公司 | High-strength aluminium alloy plate and production method thereof |
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Denomination of invention: A corrosion resistant alloy with high mechanical properties and good machinability Effective date of registration: 20220309 Granted publication date: 20160817 Pledgee: China Xinda Asset Management Co.,Ltd. Shandong Branch Pledgor: SHANDONG YUHANG SPECIAL ALLOY EQUIPMENT CO.,LTD. Registration number: Y2022980002321 |
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