CN1868636A - Preparation method of aluminium magnesium alloy powder - Google Patents
Preparation method of aluminium magnesium alloy powder Download PDFInfo
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- CN1868636A CN1868636A CN 200510026166 CN200510026166A CN1868636A CN 1868636 A CN1868636 A CN 1868636A CN 200510026166 CN200510026166 CN 200510026166 CN 200510026166 A CN200510026166 A CN 200510026166A CN 1868636 A CN1868636 A CN 1868636A
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Abstract
A process for preparing Al-Mg alloy powder used as the deoxidizing agent and nitrogen fixating agent of flux-cored welding wire includes such steps as loading the Al, Mg and RE mixture proportionally in a sealed smelting furnace, vacuumizing, filling Ar gas, heating at 600-800 deg.C for 1-2 hr, holding the temp while stirring, cooling, ball grinding in flowing Ar gas, and sieving.
Description
Technical field
The present invention relates to a kind of preparation method of Al-Mg alloy powder, relate in particular to a kind of flux-cored wire that can be used for and be used as Al-Mg alloy powder of deoxidier and nitrogen fixation agent and preparation method thereof, the alternative welding bar for hand electric arc-welding of this flux-cored wire is widely used in fields such as shipbuilding, petrochemical industry, pressure melting device, large-scale steel.
Background technology
Common Al-Mg alloy powder is the luminous agent of pyrotechnics industry and munitions industry, is used to deoxidier, cleanser in metallurgical industry more, and the present Al-Mg alloy powder of China is produced according to GB5150-2004.This Al-Mg alloy powder is by the explained hereafter of opening wide melting, nitrogen protection ball milling, and the resultant metal activity only is 96%, and harmful element C, P, the S of wlding do not examined or check.Since the last century the nineties,, extensively used the nearly 40% instead of manual welding rod of developed country's flux-cored wire in fields such as shipbuilding, high-pressure bottle, large-scale steels as the flux-cored wire of continuous high-efficient welding material along with the progress of industrial technology.China also develops rapidly, the proportion of flux-cored wire in whole wlding in recent years, by almost blank to 2004 about 5%, use almag as deoxidier and nitrogen fixation agent in the flux-cored wire manufacture process, and our traditional Al-Mg alloy powder on still being size distribution, chemical property all can not satisfy the specific (special) requirements in extraordinary wlding field fully.
Flux-cored wire is the all-position welding of a kind of energy; it is fast to have deposition rate; arc manipulation speed is fast; mechanical property is good; the composition adjustment is flexible; can weld the tool development prospect that welding procedures such as submerged-arc welding combine with gas shiled; the novel welding material of alternative welding bar for hand electric arc-welding; China is from late nineteen nineties in last century, and the sector development is rapid, and flux-cored wire is mainly by outer steel band; internal layer medicinal powder is formed; core medicinal powder is mainly by the slag former of suitable fusing point; deoxidier; denitrifier constitutes, and reduces weld porosity sensitiveness to greatest extent, obtains good deposited metal toughness simultaneously; it is the core technology that flux-cored wire is made; and oxygen and nitrogen produce the weld porosity of flux-cored wire material impact are arranged, and play aggravation and amplification mutually, and therefore deoxidation and denitrogenation are the keys that flux-cored wire is made effectively.
Summary of the invention
The objective of the invention is to invent a kind of preparation method who can be used in the flux-cored wire manufacture process as the Al-Mg alloy powder of deoxidier and nitrogen fixation agent.
For realizing above purpose, technical scheme of the present invention provides a kind of preparation side of Al-Mg alloy powder
Method is characterized in that, its method is:
(1) batching at first: select A00 aluminium ingot, 1# magnesium ingot (C＜0.05%, S＜0.01%, P＜0.01%), cleaning-drying adds the mixed rare-earth elements of 0.1%-0.5% with the ratio of aluminium 50 ± 3%, magnesium 50 ± 3%;
(2) melting then: 10
-2Under the handkerchief vacuum degree condition, applying argon gas to 1 atmospheric pressure state, smelting temperature is set at 650-800 ℃, reaches in design temperature 1-2 hour to make almagization, after fusing, be incubated, and continuous stirring 0.5-1 hour, and be cooled to room temperature;
(3) powder process again: on the vertical high energy stirring ball mill, applying argon gas protection fire ball powder-grinding, argon flow amount be the 0.1-0.5 liter/minute.
(4) final sizing classification: use the multistage sieve screening of shaking of revolving, make the alloyed powder granularity reach+180 μ are not more than 0.3% ,-75 μ m are not more than 50% distribution.
(5) packing ware-house-in inspection.
The present invention adopts and pass through to add a certain proportion of rare earth element in the vacuum melting alloying process, thereby the oxidation in the inhibition almag process reduces the oxygen content in the alloy, improves the activity of alloy; Rapidly crushing under the argon shield condition, the nitrogen protection powder process that breaks traditions reduces oxidation on the one hand, reduces nitrogenize on the other hand; To the selection of raw material, be conceived to control the content of harmful elements such as C in the final products, S, P, make it more can meet the requirement of wlding.
Magnalium is very strong to the affinity of oxygen, is the very strong deoxidier of a kind of deoxidizing capacity, and aluminium, magnesium mainly reduce the heat of oxidation of arc atmosphere by precedent desoxydation, and its deoxygenation is:
Aluminium and nitrogen also have very strong binding ability in addition, can form stable nitride and are insoluble to liquid steel and enter slag, and its reaction is as follows:
Therefore the Al-Mg alloyed powder can play good deoxidation, nitrogen fixation in flux-cored wire, and as the production of almag, its key problem in technology is how to improve product activity effectively, reduction itself contain oxygen, nitrogen content, thereby reach good deoxidation, nitrogen fixation effect.
Advantage of the present invention is to can be used in the flux-cored wire manufacture process having controlled the content of harmful elements such as C, S, P in the final products as deoxidier and nitrogen fixation agent.
The specific embodiment
The invention will be further described below in conjunction with drawings and Examples.
Embodiment
A kind of preparation method of Al-Mg alloy powder, its method is:
(1) batching at first: select A00 aluminium ingot, 1# magnesium ingot (C＜0.05%, S＜0.01%, P＜0.01%), cleaning-drying adds 0.2 part mixed rare-earth elements with the ratio of 51 parts in aluminium, 48.8 parts in magnesium;
(2) melting then: 10
-2Under the handkerchief vacuum degree condition, applying argon gas to 1 atmospheric pressure state, smelting temperature is set at 750 ℃, reaches design temperature and makes almagization in 1 hour, after fusing, be incubated, and continuous stirring 0.5 hour, and be cooled to room temperature;
(3) powder process again: on the vertical high energy stirring ball mill, applying argon gas protection fire ball powder-grinding, argon flow amount is 0.3 liter/minute.
(4) final sizing classification: use the multistage sieve screening of shaking of revolving, make the alloyed powder granularity reach+180 μ are not more than 0.3% ,-75 μ m are not more than 50% distribution.
(5) packing ware-house-in inspection: product is packed in the polybag, packs into after sealing and can hold in the metal bucket or fiber can of 50kg product.
The performance of final products is:
1. chemical analysis: Al 50 ± 3% Mg50 ± 3% activity 〉=98%
Fe≤0.15％ Si≤0.3％ H
2O≤0.2％
C≤0.05％ S≤0.01％ P≤0.01％
2. granularity :+180 μ m≤0.3%-75 μ≤50%
Claims (1)
1. the preparation method of an Al-Mg alloy powder is characterized in that, its method is:
(1) batching at first: select A00 aluminium ingot, 1# magnesium ingot (C＜0.05%, S＜0.01%, P＜0.01%), cleaning-drying adds the mixed rare-earth elements of 0.1%-0.5% with the ratio of aluminium 50 ± 3%, magnesium 50 ± 3%;
(2) melting then: under 10-2 handkerchief vacuum degree condition, applying argon gas to 1 atmospheric pressure state, smelting temperature are set at 600-800 ℃, reach in design temperature 1-2 hour and make almagization, after fusing, be incubated, and continuous stirring 0.5-1 hour, and be cooled to room temperature;
(3) powder process again: on the vertical high energy stirring ball mill, applying argon gas protection fire ball powder-grinding, argon flow amount be the 0.1-0.5 liter/minute;
(4) final sizing classification: use the multistage sieve screening of shaking of revolving, make the alloyed powder granularity reach+180 μ are not more than 0.3% ,-75 μ m are not more than 50% distribution;
(5) packing ware-house-in inspection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200510026166 CN1868636A (en) | 2005-05-25 | 2005-05-25 | Preparation method of aluminium magnesium alloy powder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200510026166 CN1868636A (en) | 2005-05-25 | 2005-05-25 | Preparation method of aluminium magnesium alloy powder |
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| CN1868636A true CN1868636A (en) | 2006-11-29 |
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| CN 200510026166 Pending CN1868636A (en) | 2005-05-25 | 2005-05-25 | Preparation method of aluminium magnesium alloy powder |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108637264A (en) * | 2018-06-05 | 2018-10-12 | 广东省材料与加工研究所 | A kind of ball mill improves the 3D printing method of metal powder mobility and 3D printing metal powder |
-
2005
- 2005-05-25 CN CN 200510026166 patent/CN1868636A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108637264A (en) * | 2018-06-05 | 2018-10-12 | 广东省材料与加工研究所 | A kind of ball mill improves the 3D printing method of metal powder mobility and 3D printing metal powder |
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Open date: 20061129 |