CN102601527A - Welding method for magnesium matrix composite - Google Patents
Welding method for magnesium matrix composite Download PDFInfo
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- CN102601527A CN102601527A CN2012100610304A CN201210061030A CN102601527A CN 102601527 A CN102601527 A CN 102601527A CN 2012100610304 A CN2012100610304 A CN 2012100610304A CN 201210061030 A CN201210061030 A CN 201210061030A CN 102601527 A CN102601527 A CN 102601527A
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Abstract
The invention discloses a welding method for a magnesium matrix composite, and relates to the welding method for a metal composite material. The welding method comprises the steps of: firstly carrying out pre-welding treatment, including processes of polishing, cleaning, clamping and baking, on a welded sample; in a welding process by utilizing laser welding, selecting proper welding parameters, for example, a spot diameter of 1.5mm, a pulse width of 0.5ms, a laser pulse frequency of 60Hz, a welding power of 340-360W and a laser scanning speed of 300-400mm/min; and finally obtaining a good welding result, namely the welding line is continuous, completely penetrated, fish-scale and small in joint deformation; the highest strength of the joint can be up to 80.6Mpa, and the microhardness of the welding line is 180-200HV.
Description
Technical field
The present invention relates to the welding method of metallic composite, specifically is a kind of magnesium base composite material welding method.
Background technology
Magnesium base composite material (MMCs) has high specific strength and elastic modelling quantity, good wearability, approach zero thermal coefficient of expansion and good dimensional stability; Can be used for the manufacturing of high-performing car parts; Satisfy automobile loss of weight requirements of saving energy; At aerospace field, being successfully used to make artificial satellite support, L frequency band flat plane antenna, space telescope, artificial satellite parabola antenna etc. simultaneously, is the new material of giving priority to 21 century.Yet, must face the problem of welding in the manufacturing of magnesium base composite material member, this is the brand-new problem that modern manufacturing industry faces.
Magnesium is active maximum metal; Its fusing point (651 ℃) and boiling point (1107 ℃) are low; In hot procedure, volatilization, burning (in air, being heated to 550 ℃ will burn suddenly) oxidation, air-breathing appear easily; Therefore, the welding fabrication of magnesium alloy and composite thereof is unusual stubborn problem.At present, the welding method of magnesium alloy has Tungsten-arc Inert-Gas welding (TIG), metal arc inert gas-shielded arc welding (MIG), plasma arc welding (PAW), electron beam welding and friction welding (FW) etc.TIG and MIG are magnesium alloy topmost two kinds of welding methods at present, but have that speed of welding is low, the heat affected area is big, the melting zone is wide, shrinkage factor is high, tissue and problems such as the performance dispersion is big, the alloying element vaporization loss is serious, weld stress and distortion are big, magnesium base composite material member density is low simultaneously; Fusing point is low, and thermal conductivity and electrical conductivity are big, and thermal coefficient of expansion is big; Chemical activity is very strong; Be prone to oxidation, and the fusing point of oxide is very high, these two kinds of methods all are difficult to obtain the welding point that is complementary with the mother metal performance; Particularly, worsened its weldability more owing to added the enhancing body in the magnesium base composite material.
Summary of the invention
In order to solve the above-mentioned Welding Problems that present magnesium base composite material exists, the present invention provides a kind of welding method of magnesium base composite material Laser Welding, and optimizes welding condition, has finally reached good welding result.
Technical scheme of the present invention is: a kind of magnesium base composite material welding method; At first the method with the line cutting cuts into 20mm * 60mm size with magnesium base composite material; The sheet sheet coupon of thick 1.5mm, and to the cutting after sample carry out pre-welding treatment, pre-welding treatment may further comprise the steps:
A. polishing
Before welding, remove the oxide skin on the material with coarse sandpaper polishing specimen surface and solder joint earlier, make its smooth;
B. clean
With the sample after the acetone polishing, the oxide skin under removing oil stain and polishing after cleaning, is put the ventilation and is dried;
C. clamping
After treating that sample dries, the clamping sample, avoiding in the clamping process catches touches welding region, particularly solder joint place, the living harmful effect in order to avoid butt welding is practiced midwifery;
D. oven dry
Need oven dry after the sample clamping is intact, put into whole anchor clamps the baking oven baking of 100 ℃ (the too high meeting of temperature makes the composite oxidation) and took out cooling naturally in 5 minutes.
In clamping sample process; The thick tagger of pad one deck 0.2mm between the clamping plate of anchor clamps and sample, and exceed the inboard part of clamping plate, behind the solder joint of two samples of alignment; Strap; With thin scraper (width be slightly less than between two clamping plate distance and greater than the distance between the tagger) dip in and get the solder joint place that the aluminium powder slurry spreads upon two samples, and smooth with thin scraper scraped finish, the thickness of aluminium powder slurry equates with the thickness of tagger.Used aluminium powder slurry is that 4% polyvinyl alcohol water solution and 200 purpose aluminium powders mix to mix well and form by mass concentration; The addition of aluminium powder makes the sliminess of slurry for can just form drop; Like this in ensuing laser beam welding; The aluminium powder slurry can replenish the part of molten bath oxidization burning loss in the welding process, helps the formation in molten bath.
Used anchor clamps are the self-control anchor clamps, and it is made up of a substrate and two clamping plates, and substrate is horizontally disposed with; Two clamping plates is parallel to be located on the substrate; Connect through screw between clamping plate and the substrate, the bottom of the side that two clamping plates is relative is respectively equipped with a boss, and the thickness of clamping plate is 2mm; The thickness of boss is 0.5mm, also is provided with v-depression on the upper surface of substrate.
The Laser Welding welding procedure: adopt hot conduction-type welding method, welding point is the butt joint type, spot diameter 1.5mm, pulsewidth 0.5ms; Laser pulse frequency 60Hz, bonding power 340 ~ 360W, laser scanning speed 300 ~ 400mm/min; Protection gas is argon gas, and the argon gas channel that flows has two, one with the coaxial protection amasthenic lens of laser beam; Flow velocity is 1.2L/min, and another protective gas is the duck eye protection Laser Welding molten bath of 0.3mm through the diameter of proper alignment, and flow velocity is 1.75L/min.
Beneficial effect: adopt welding method of the present invention that magnesium base composite material is welded; Can form weld seam preferably; Weld seam continuously, fully penetration, be the fish scale shape, joint distortion is little, strength of joint reaches as high as 80.6Mpa, the weld seam microhardness is at 180 ~ 200HV; And the present invention compares with conventional welding methods, has that the input heat is low, the heat affected area is little, molten width, stress and remarkable advantages such as deformation is little, speed of welding height.
Description of drawings
Fig. 1 is the front view of the anchor clamps used among the present invention.
Fig. 2 is the vertical view of the anchor clamps used among the present invention.
Fig. 3 is for smearing the sketch map of aluminium powder slurry among the present invention at the solder joint place of two samples.
Be labeled as among the figure: 1, substrate, 2, clamping plate, 3, screw, 4, boss, 5, v-depression, 6, sample, 7, tagger, 8, thin scraper, 9, the aluminium powder slurry.
The specific embodiment
At first the method with line cutting cuts into 20mm * 60mm size with magnesium base composite material, the sheet sheet coupon of thick 1.5mm, then with coarse sandpaper polishing specimen surface and solder joint to remove the oxide skin on surface, make its smooth; With the sample after the acetone polishing, the oxide skin under removing oil stain and polishing after cleaning, is put the ventilation and is dried again; After treating that sample dries, carry out the clamping sample, in the clamping process; At the thick tagger 7 of pad one deck 0.2mm between the clamping plate 2 of anchor clamps and sample 6, and exceed clamping plate 2 inboard parts, behind the solder joint of two samples 6 of alignment; Strap 2; Dip in the solder joint place that the aluminium powder slurry 9 that takes a morsel spreads upon two samples 6 with thin scraper 8, and smooth with thin scraper 8 scraped finishes, and the thickness of aluminium powder slurry 9 equates with the thickness of tagger 7; Used aluminium powder slurry is that 4% polyvinyl alcohol water solution and 200 purpose aluminium powders mix to mix well and form by mass concentration, and the addition of aluminium powder makes the sliminess of slurry for can just form drop; After the sample clamping is intact, put into 100 ℃ baking oven baking taking-up in 5 minutes to whole anchor clamps, cool off naturally; The parameter of regulating laser welder then is provided with carries out laser weld to sample, wherein adopts hot conduction-type welding method in the welding process, and the sample welding joint is the butt joint type; Spot diameter 1.5mm, pulsewidth 0.5ms, laser pulse frequency 60Hz; Bonding power 340 ~ 360W, laser scanning speed 300 ~ 400mm/min, protection gas is argon gas; The argon gas channel that flows has two, one with the coaxial protection amasthenic lens of laser beam, flow velocity is 1.2L/min; Another protective gas is the duck eye protection Laser Welding molten bath of 0.3mm through the diameter of proper alignment, and flow velocity is 1.75L/min.
After having welded, the weld seam preferably that obtained being shaped, weld seam continuously, fully penetration, be the fish scale shape, joint distortion is little, strength of joint is 70.2 ~ 80.6Mpa, the weld seam microhardness is 180 ~ 200HV.
Claims (2)
1. magnesium base composite material welding method, it is characterized in that: process is following:
(1), at first the method with line cutting cuts into 20mm * 60mm size with magnesium base composite material, the sheet sheet coupon of thick 1.5mm is removed the oxide skin on surface then with coarse sandpaper polishing specimen surface and welding point, make its smooth;
(2), with the sample after the acetone polishing, remove oil stain and polishing oxide skin down, clean after, put the ventilation and dry;
(3), treat that sample dries after; On anchor clamps, the thick tagger of pad one deck 0.2mm between the clamping plate of anchor clamps and sample is behind the solder joint of two samples of alignment with two sample clampings; Strap; Dip in thin scraper then and get the aluminium powder slurry and spread upon the sample welding seam crossing, and scraped finish is smooth, the thickness of aluminium powder slurry equates with the thickness of tagger;
Described aluminium powder slurry is that 4% polyvinyl alcohol water solution and 200 purpose aluminium powders mix to mix well and form by mass concentration, and the addition of aluminium powder makes the sliminess of slurry for can just form drop;
(4), the sample clamping intact after, after 5 minutes, take out the nature cooling to its baking oven baking of putting into 100 ℃;
(5), the parameter of regulating laser welder is provided with sample carried out laser weld, wherein adopts hot conduction-type welding method, the sample welding joint is the butt joint type; Spot diameter 1.5mm, pulsewidth 0.5ms, laser pulse frequency 60Hz; Bonding power 340 ~ 360W, laser scanning speed 300 ~ 400mm/min, protection gas is argon gas; Wherein the argon gas flow velocity with laser beam coaxial direction protection amasthenic lens is 1.2L/min, and the argon gas flow velocity in protection Laser Welding molten bath is 1.75L/min.
2. the anchor clamps that a kind of magnesium base composite material welding method as claimed in claim 1 is adopted; It is characterized in that: form by a substrate (1) and two clamping plates (2); Substrate (1) is horizontally disposed with, and two clamping plates (2) is parallel to be located on the substrate (1), connects through screw (3) between clamping plate and the substrate; The bottom of the side that two clamping plates (2) is relative is respectively equipped with a boss (4); The thickness of clamping plate (2) is 2mm, and the thickness of boss (4) is 0.5mm, and the upper surface of substrate (1) also is provided with v-depression (5).
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| CN2012100610304A CN102601527A (en) | 2012-03-09 | 2012-03-09 | Welding method for magnesium matrix composite |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103071923A (en) * | 2012-12-28 | 2013-05-01 | 江苏大学 | Laser transmission composite connecting method |
| CN103753023A (en) * | 2014-02-14 | 2014-04-30 | 苏州大学 | Welding method of hot-rolled nano reinforced steel plates |
| CN103801842A (en) * | 2014-01-17 | 2014-05-21 | 河南科技大学 | Jig special for laser welding |
| CN103878484A (en) * | 2014-03-25 | 2014-06-25 | 西安交通大学 | Efficient butt-joint laser welding method for laminated duplex-metal composite material |
| CN104889579A (en) * | 2015-06-05 | 2015-09-09 | 江苏科技大学 | Clamp used for laser full-penetration welding of T-shaped joint and welding method using clamp |
| CN109530882A (en) * | 2018-11-14 | 2019-03-29 | 陈欣洁 | A kind of weldment surface treatment method |
| CN110261303A (en) * | 2019-07-26 | 2019-09-20 | 兰州大学 | A kind of superconducting tape transverse direction peel strength testing device and test method |
| CN114054909A (en) * | 2021-11-10 | 2022-02-18 | 唐旭勇 | Metal plate welding machine and welding process thereof |
| CN114918542A (en) * | 2022-03-04 | 2022-08-19 | 南京理工大学 | Nanoparticle reinforced laser powder filling welding method for high-strength aluminum alloy |
| CN116372323A (en) * | 2023-06-05 | 2023-07-04 | 四川吉埃智能科技有限公司 | Industrial intelligent welding robot and driving and controlling method |
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Cited By (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103071923A (en) * | 2012-12-28 | 2013-05-01 | 江苏大学 | Laser transmission composite connecting method |
| CN103071923B (en) * | 2012-12-28 | 2016-05-25 | 江苏大学 | A kind of laser-transmitting composite connecting method |
| CN103801842A (en) * | 2014-01-17 | 2014-05-21 | 河南科技大学 | Jig special for laser welding |
| CN103753023A (en) * | 2014-02-14 | 2014-04-30 | 苏州大学 | Welding method of hot-rolled nano reinforced steel plates |
| CN103753023B (en) * | 2014-02-14 | 2016-08-17 | 苏州大学 | The welding method of hot rolling nano reinforcement steel plate |
| CN103878484A (en) * | 2014-03-25 | 2014-06-25 | 西安交通大学 | Efficient butt-joint laser welding method for laminated duplex-metal composite material |
| CN103878484B (en) * | 2014-03-25 | 2015-08-26 | 西安交通大学 | The efficient docking laser welding method of a kind of layered bi-metal composite |
| CN104889579A (en) * | 2015-06-05 | 2015-09-09 | 江苏科技大学 | Clamp used for laser full-penetration welding of T-shaped joint and welding method using clamp |
| CN109530882A (en) * | 2018-11-14 | 2019-03-29 | 陈欣洁 | A kind of weldment surface treatment method |
| CN109530882B (en) * | 2018-11-14 | 2020-06-26 | 浙江永强集团股份有限公司 | Surface treatment method for weldment |
| CN110261303A (en) * | 2019-07-26 | 2019-09-20 | 兰州大学 | A kind of superconducting tape transverse direction peel strength testing device and test method |
| CN114054909A (en) * | 2021-11-10 | 2022-02-18 | 唐旭勇 | Metal plate welding machine and welding process thereof |
| CN114918542A (en) * | 2022-03-04 | 2022-08-19 | 南京理工大学 | Nanoparticle reinforced laser powder filling welding method for high-strength aluminum alloy |
| CN114918542B (en) * | 2022-03-04 | 2024-04-19 | 南京理工大学 | Nanoparticle reinforced laser powder filling welding method for high-strength aluminum alloy |
| CN116372323A (en) * | 2023-06-05 | 2023-07-04 | 四川吉埃智能科技有限公司 | Industrial intelligent welding robot and driving and controlling method |
| CN116372323B (en) * | 2023-06-05 | 2023-08-18 | 四川吉埃智能科技有限公司 | Industrial intelligent welding robot and driving and controlling method |
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Application publication date: 20120725 |