CN109014563A - A method of improving material stirring friction welding joint performance of the same race - Google Patents
A method of improving material stirring friction welding joint performance of the same race Download PDFInfo
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- CN109014563A CN109014563A CN201811218576.XA CN201811218576A CN109014563A CN 109014563 A CN109014563 A CN 109014563A CN 201811218576 A CN201811218576 A CN 201811218576A CN 109014563 A CN109014563 A CN 109014563A
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- welding
- friction
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- same race
- material stirring
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K20/00—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating
- B23K20/12—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating the heat being generated by friction; Friction welding
- B23K20/122—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating the heat being generated by friction; Friction welding using a non-consumable tool, e.g. friction stir welding
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K20/00—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating
- B23K20/12—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating the heat being generated by friction; Friction welding
- B23K20/122—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating the heat being generated by friction; Friction welding using a non-consumable tool, e.g. friction stir welding
- B23K20/123—Controlling or monitoring the welding process
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Pressure Welding/Diffusion-Bonding (AREA)
Abstract
The present invention relates to a kind of methods for improving material stirring friction welding joint performance of the same race.The present invention has the asinh constitutive equation of Zener-Hollomon parameter according to visco-plasticity metal in the Campbell criterion and welding process of stretching plastic deformation's phenomenological, establishes the boundary condition of flow stress in agitating friction weldering welding process；Mathematics relationship between physical parameter and constitutive equation parameter based on agitating friction weldering welding condition, flow stress boundary condition and material, establishes the analytic modell analytical model of agitating friction weldering nugget area peak temperature and technological parameter；By inputting actual peak temperature, the welding condition that can be optimized after the calculating of mathematics analytic modell analytical model instructs welding production to be greatly improved the performance of material stirring friction welding joint of the same race with this parameter.The present invention provides a kind of new high efficiency method for the optimization of material stirring friction welding (FW) welding condition of the same race and the improvement of performance.
Description
Technical field
The present invention relates to agitating frictions to weld field, specifically a kind of side for improving material stirring friction welding joint performance of the same race
Method.
Background technique
Aluminium alloy, magnesium alloy, titanium alloy are most widely used non-ferrous metal structural materials in industry, Aeronautics and Astronautics,
It has been widely applied in automobile, machine-building, ship and chemical industry.The rapid development of industrial economy, to aluminium alloy, magnesium alloy,
The demand of the welding structural elements such as titanium alloy is increasing, gos deep into the research of its weldability also therewith.
Agitating friction welding technology is the commissure that two welded pieces are inserted into using a high temperature resistant, the non-stirring-head from damage property
It rubs with workpiece, heat caused by this friction makes the raising of the metal temperature around stirring-head reach plasticity softening rank
Section, as stirring-head is rotationally advancing, these visco-plasticity metals being softened flow under the stirring action of mixing needle, weld seam
The metal mixed at place recrystallizes a kind of solid-phase welding technology of connection together.Agitating friction welding technology is efficient, environmentally friendly.At present
Agitating friction welding technology is increasingly by the concern of aerospace field.
In agitating friction weldering welding process, temperature is to influence the master of plastic metal flowing, defect formation and strength of joint
Want factor.When heat input is excessively high, extra plastic metal can generate overlap, surface flash and nugget and collapse, if hot
Input quantity is too low, and the mobility decline of plastic metal causes advanced side the defects of groove, hole or non-soldering occur, therefore,
During agitating friction weldering, temperature cannot be too high or too low.Be further stirred for a variety of welding defects existing for friction welding (FW) all with do not conform to
The welding procedure of reason is related, such as lack of penetration, non-soldering, tunnel, hole, surface grooves, galled spots, nugget are collapsed and kissed
Connect etc. it is mainly related with the technological parameters such as rotation speed, forward speed, in the welding process, due to the inappropriate office of process choice
Portion, which melts, to happen occasionally, and then will cause that welding quality forming property is poor, and intensity cannot reach required requirement.Cause
This, is avoided these defects, and the optimization of technological parameter is just particularly important.
Currently, numerous studies are devoted to find out the influence that technological parameter forms defect, rub to reach optimization stirring
The purpose of Welding parameter is wiped, and the optimization of technological parameter is obtained by testing, this method is time-consuming, laborious,
And the module design including the complexity such as online detection module, Signal acquiring and processing module, welding procedure control module, it increases
Production cost is added.
Summary of the invention
Fig. 1 is a kind of method flow diagram for improving friction stir welding performance.The present invention is by using for reference draft flowing deformation only
As the flow stress stability criteria and welding process visco-plasticity metal of Campbell criterion have Zener-Hollomon parameter
Stress, strain rate, the asinh constitutive equation of relationship between temperature establishes corresponding material stirring friction welding (FW) stream of the same race
Visco-plasticity metal layer thickness is equal to the ratio of forward speed and speed of welding later, utilizes this by the boundary condition of varying stress
Relationship introduces the technological parameter during agitating friction weldering, establishes the solution between the peak temperature of optimization and the technological parameter of optimization
Analyse model；The actual peak temperature determined by input by temperature field, the technological parameter optimized by analytic modell analytical model, from
And many defects during avoiding agitating friction from welding.The invention is raising and the technological parameter that agitating friction welds welding performance
Optimization a kind of new efficient method is provided.
A kind of method improving material stirring friction welding joint performance of the same race of the invention, Fig. 1 are a kind of raising material of the same race
The method flow diagram of matter friction stir welding performance, the specific steps are that:
(1) it determines welding process actual temperature field: determining target by weldering metal by the method for experiment or software simulation
Temperature field；(2) the actual peak temperature in nugget area: according to quasi-definite real by weldering metal via experiment or software mould in step 1
The temperature field on border obtains the actual peak temperature in nugget area in welding process in turn；(3) it establishes peak temperature and welding procedure is joined
Number analytic modell analytical model: the process specific order of foundation are as follows: the flow stress that a. uses for reference draft flowing deformation phenomenological Campbell criterion is stablized
Property criterion and welding process visco-plasticity metal have the asinh constitutive equation of Zener-Hollomon parameter, establish corresponding
The boundary condition of material stirring friction welding (FW) flow stress of the same race；B. the visco-plasticity metal layer thickness etc. in stir friction welding process
In the ratio of forward speed and speed of welding, the technological parameter of Friction Stir Welding is introduced by this relationship；C. with fluid force
The conservation of mass and the conservation of momentum are governing equation, using material stirring friction welding (FW) flow stress of the same race as boundary condition in,
It establishes between stirring friction-welding technique parameter, the physical parameter of material and constitutive equation parameter and agitating friction weldering peak temperature
Analytic modell analytical model；(4) acquisition of welding process Optimizing Process Parameters: the technological parameter of optimization obtained in step 2 by stirring
The analytic modell analytical model established in actual peak temperature and step 3 in friction welding process obtains；(5) with certain shapes, one
The stirring-head at constant inclination angle, is welded on friction stir welding machine, uses uniform thickness by weldering metal, the mode of docking is according to optimization
The welding of technological parameter constant speed.
A kind of method improving material stirring friction welding joint performance of the same race, it is characterised in that: the mode of welding
Using uniform thickness, the plate of docking is welded using the technological parameter constant speed of optimization.
A kind of method improving material stirring friction welding joint performance of the same race, it is characterised in that: welding material packet
Include aluminium alloy, magnesium alloy, titanium alloy.
Detailed description of the invention
Fig. 1 is a kind of method flow diagram for improving material stirring friction welding joint performance of the same race
Fig. 2 is the 5083 aluminium alloy tensile strength figures that different process is drawn
Example is embodied
In order to more clearly express usefulness of the present invention, the present invention is carried out specifically below with reference to example
Bright, following instance will be helpful to those skilled in the art and further understand the present invention, but the invention is not limited in any way,
It should be pointed out that those skilled in the art, under the premise of not departing from design of the invention, can also do
Several variations out, these are all within the scope of protection of the present invention.
Specific embodiment: present embodiment is described in conjunction with Fig. 1.The method and step of present embodiment is as follows:
It is respectively 30mm, 15mm, 4mm, welding equipment nine having a size of length, width and height using 5083 aluminium alloy plates as welding material
Side's welding gantry two dimension FSW welding machine, stirring-head are non-threaded stirring-head.
It is 769k that step 1:, which obtaining the temperature field of aluminium alloy 5083 by experiment, and then obtains its peak temperature.
Step 2: according to the stirring friction-welding technique parameter of foundation, the physical parameter of material and constitutive equation parameter with
Agitating friction welds the analytic modell analytical model between peak temperature, obtains the technological parameter of welding process optimization, i.e. forward speed is
200mm/min, rotation speed 1000rpm.
Step 3: 5083 aluminium are welded with forward speed 200mm/min, rotation speed 1000rpm in a manner of uniform thickness, docking
Sheet alloy, it is 302.85Mpa that stretched performance test, which obtains tensile strength, has reached the 87.3% of base material, and then obtain
The weldment of good mechanical performance.
Examples detailed above is only to illustrate an example in homogeneity aluminum alloy stirring friction welding, is not intended to limit the invention
Thought.
Claims (3)
1. a kind of method for improving material stirring friction weldability of the same race, feature is realized by following steps:
(1) it determines welding process actual temperature field: determining target by the temperature of weldering metal by the method for experiment or software simulation
?；
(2) the actual peak temperature in nugget area is determined: according to actual via experiment or the quasi-definite metal of software mould in step 1
Temperature field obtains the actual peak temperature in nugget area in welding process in turn；
(3) peak temperature and welding condition analytic modell analytical model: the stream of a. reference draft flowing deformation phenomenological Campbell criterion are established
Varying stress stability criteria and welding process visco-plasticity metal have this structure of the asinh of Zener-Hollomon parameter side
Journey establishes the boundary condition of corresponding material stirring friction welding (FW) flow stress of the same race；B. the visco-plasticity in stir friction welding process
Metal layer thickness is equal to the ratio of forward speed and speed of welding, is joined by the technique that this relationship introduces Friction Stir Welding
Number；C. welding flow stress as governing equation, with homogeneity agitating friction using the conservation of mass in hydrodynamics and the conservation of momentum is
Boundary condition, establishes stirring friction-welding technique parameter, and the physical parameter and constitutive equation parameter and agitating friction of material weld peak
The analytic modell analytical model being worth between temperature；
(4) acquisition of welding process Optimizing Process Parameters: the technological parameter of optimization passes through Friction Stir Welding obtained in step 2
The analytic modell analytical model established in actual peak temperature in the process and step 3 obtains；
(5) with certain shapes, the stirring-head at certain inclination angle is welded on friction stir welding machine, uses uniform thickness by weldering metal,
The mode of docking is welded according to the technological parameter constant speed of optimization.
2. a kind of method for improving material stirring friction welding joint performance of the same race according to claim 1, it is characterised in that:
The mode of welding uses uniform thickness, and the plate of docking is welded using the technological parameter constant speed of optimization.
3. a kind of method for improving material stirring friction welding joint performance of the same race according to claim 1, it is characterised in that:
Welding material includes aluminium alloy, magnesium alloy, titanium alloy.
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| CN201811218576.XA CN109014563A (en) | 2018-10-18 | 2018-10-18 | A method of improving material stirring friction welding joint performance of the same race |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114406447A (en) * | 2022-01-25 | 2022-04-29 | 东北大学 | Preparation method of high-strength high-toughness friction stir welding joint of pipeline steel |
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2018
- 2018-10-18 CN CN201811218576.XA patent/CN109014563A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114406447A (en) * | 2022-01-25 | 2022-04-29 | 东北大学 | Preparation method of high-strength high-toughness friction stir welding joint of pipeline steel |
| CN114406447B (en) * | 2022-01-25 | 2022-09-20 | 东北大学 | Preparation method of high-strength high-toughness friction stir welding joint of pipeline steel |
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Application publication date: 20181218 |