CN107738030B - A kind of law temperature joining method of aluminium bronze and stainless steel - Google Patents
A kind of law temperature joining method of aluminium bronze and stainless steel Download PDFInfo
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- CN107738030B CN107738030B CN201710849354.7A CN201710849354A CN107738030B CN 107738030 B CN107738030 B CN 107738030B CN 201710849354 A CN201710849354 A CN 201710849354A CN 107738030 B CN107738030 B CN 107738030B
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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
- B23K23/00—Alumino-thermic welding
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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
- B23K37/00—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups
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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
- B23K2103/00—Materials to be soldered, welded or cut
- B23K2103/18—Dissimilar materials
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- Pressure Welding/Diffusion-Bonding (AREA)
Abstract
The invention discloses a kind of law temperature joining method of aluminium bronze and stainless steel, specifically: surface clean is carried out to aluminium bronze coupon and stainless steel sample block first；The upper surface of stainless steel sample block after cleaning is punched, and aluminium powder is filled in hole, then spreads aluminium powder in upper surface, and aluminium bronze coupon is placed in the upper surface of stainless steel sample block；Aluminium bronze coupon and stainless steel sample block are finally subjected to the liquid-solid connection of microcell at low temperature to get aluminium bronze-rustless steel double-metal composite material is arrived.The present invention realizes the metallurgical bonding of aluminium bronze and two kinds of materials of stainless steel by the liquid-solid diffusion of microcell；Simultaneously, stainless steel crystallite dimension is grown up when lower connection temperature not only avoids high temperature, so that the intensity of stainless steel is guaranteed, and reduce production cost, finally with low cost obtain interface bond strength is stable, near combined area excellent material performance aluminium bronze-rustless steel double-metal composite material.
Description
Technical field
The invention belongs to dissimilar materials interconnection technique fields, and in particular to a kind of law temperature joining side of aluminium bronze and stainless steel
Method.
Background technique
With the development of modern science and technology, variation with rapid changepl. never-ending changes and improvements, single metal or conjunction also occur for material industry
Gold has been difficult to fully meet demand of the modern high technology production to material comprehensive performance, and dissimilar materials is because having both different materials respectively
Excellent performance is widely used in the industrial circles such as aerospace, nuclear energy engineering, petrochemical industry, automobile manufacture.
Thus, the interconnection technique in relation to dissimilar materials becomes one of the hot issue of present material connection area.
Aluminium bronze be using copper-aluminium system as the alloy of base, because of its higher intensity, hardness, wearability and corrosion resistance, with
And relatively low material cost, have become the substitute of the alloy materials such as nickel-base alloy, stainless steel and tin bronze, is modern
Using a kind of extremely extensive Novel copper alloy in industry.Stainless steel as the greatest invention of Material Field early 20th century it
One, other than with excellent corrosion resistance and heat resistance, also have relatively high intensity, good moulding and toughness with
And without magnetic or the advantages that weak magnetic, obtained extensively in fields such as petrochemical industry, energy project, industrial manufacture, building decorations
Application.Complementarity in view of aluminium bronze and stainless steel in performance and economically is needed in actual application field by two kinds
Material is attached, and is prepared into a kind of aluminium bronze-rustless steel double-metal composite material of excellent combination property.This aluminium bronze-
Rustless steel double-metal composite material had not only had aluminium bronze good wear-resisting and corrosion resistance, but also had stainless steel high-intensitive, high
The characteristics such as hardness, as high-intensitive anti-attrition, wear-resisting and resistant material in High Voltage hydraulic system and high abrasion bushing material
Equal fields have broad application prospects.
Currently, the interconnection technique that aluminium bronze and stainless steel are most widely used is liquid-solid connection method, it is by two kinds of materials
While heated to the fusing point temperatures above of aluminium bronze, guarantees aluminium bronze fusing under high temperature environment, and stainless steel keeps solid-state, leads to
It crosses liquid to spread admittedly, realizes the metallurgical bonding of the two.The higher double metallic composite material of bond strength can be obtained in this method, still
It is connected under high temperature environment, is easy to be roughened stainless crystalline grain of steel, is reduced its intensity, while after high temperature conjunction, needing
Composite material is heat-treated again, complex technical process, higher cost.It is, thus, sought for new connection method, is dropping
On the basis of low connection temperature, guarantee two kinds of materials respectively excellent properties and the good interface bond strength of composite material.
Summary of the invention
The object of the present invention is to provide a kind of law temperature joining methods of aluminium bronze and stainless steel, solve prior art connection
It is easy two kinds of basis material tissues of roughening in the process, so that the problem of basis material strength reduction.
The technical scheme adopted by the invention is that a kind of law temperature joining method of aluminium bronze and stainless steel, specifically according to
Lower step is implemented:
Step 1, surface clean is carried out to aluminium bronze coupon and stainless steel sample block；
Step 2, aluminium bronze coupon and the combination of stainless steel sample block:
The upper surface of stainless steel sample block after cleaning is punched, and aluminium powder is filled in hole, then spreads aluminium in upper surface
Powder, and aluminium bronze coupon is placed in the upper surface of stainless steel sample block；
Step 3, it is liquid-solid that the aluminium bronze coupon and stainless steel sample block combined to step 2 carries out microcell at low temperature
It connects to get aluminium bronze-rustless steel double-metal composite material is arrived.
Feature of the present invention also resides in,
The surface clean of aluminium bronze coupon and stainless steel sample block in step 1, specifically: first with 600#~1000#Sand paper
Grinding process stainless steel sample block and aluminium bronze coupon surface, are then wiped clean surface and oil contaminant with soft cloth or paper,
It is immersed in progress 10~30min of supersonic oscillations in alcohol reagent later, removes remaining greasy dirt.
The diameter that stainless steel sample block upper surface is punched in step 2 is 1~3mm, depth is 0.3~1mm.
Stainless steel sample block upper surface, which is punched, in step 2 is evenly distributed on stainless steel sample block upper surface, the area in hole
Account for the 15%~25% of stainless steel upper surface area.
Stainless steel sample block upper surface is machined with the pit of invagination along edge in step 2, and hole is located in pit, aluminium bronze examination
Sample block is located in pit.
The spread aluminium powder of stainless steel sample block pit surface is in step 2 with a thickness of 0.1~1mm.
Step 3 specifically: the aluminium bronze coupon combined and stainless steel sample block are placed in heating furnace, vacuumized,
Aluminium bronze coupon and stainless steel sample block are heated, when temperature reaches 700~800 DEG C, apply the pressure of 3~5MPa
After keeping the temperature 20~60min, furnace cooling.
Heat temperature raising speed is 10~20 DEG C/min.
Vacuum degree is vacuumized in rear furnace in 1~10Pa.
The invention has the advantages that a kind of law temperature joining method of aluminium bronze and stainless steel of the present invention, first in ultrasound
Stainless steel surface after wave cleaning carries out laser boring, and then plug fills out aluminium powder in the hole of stainless steel surface, and in stainless steel
The surface of punching spreads a thin layer aluminium powder, the liquid-solid connection of microcell is carried out under the lower temperature more than aluminium powder fusing point later, by micro-
The metallurgical bonding of the two is realized in the liquid-solid diffusion in area；Meanwhile lower connection temperature not only avoids stainless crystalline grain of steel ruler when high temperature
Modest ability is big, so that the intensity of stainless steel is guaranteed, and reduces production cost, finally obtains interface cohesion with low cost
Aluminium bronze-rustless steel double-metal composite material of excellent material performance near intensity stabilization, combined area.
Detailed description of the invention
Fig. 1 is the process flow chart of the law temperature joining method of a kind of aluminium bronze of the present invention and stainless steel；
Fig. 2 is the placement order schematic diagram of coupon in connection method of the present invention.
In figure, 1. aluminium bronze coupons, 2. stainless steel sample blocks, 3. aluminium powders.
Specific embodiment
The following describes the present invention in detail with reference to the accompanying drawings and specific embodiments.
A kind of law temperature joining method of aluminium bronze and stainless steel of the present invention, first to the aluminium bronze coupon to be attached
It is cleaned with stainless steel sample block；Then laser boring is carried out in stainless steel surface, fills in and fills out in the hole of stainless steel surface
Aluminium powder, and a thin layer aluminium powder is spread on the surface of stainless steel punching；Finally aluminium bronze is placed in above the stainless steel for being covered with aluminium powder,
Pass through the liquid-solid connection of microcell at low temperature to get aluminium bronze-rustless steel double-metal composite material is arrived.
As shown in Figure 1, being specifically implemented according to the following steps:
Step 1, the stainless steel bars that material is 1Cr18Ni9Ti oxide layer post-processing is machined out to deposit at surface
In the coupon of Φ 28mm × 35mm of Φ 26mm × 5mm pit；Aluminium bronze bar is cut into Φ 24mm × 30mm's
Coupon.
Step 2, first with 600#~1000#The stainless steel sample block and aluminium bronze coupon that sand paper grinding process step 1 obtains
Surface, then surface and oil contaminant is wiped clean with soft cloth or paper, is immersed in alcohol reagent progress ultrasonic wave vibration later
10~30min is swung, remaining greasy dirt is removed；
Step 3, the stainless steel sample block after step 2 cleaning is mounted on to the three-coordinate moving operating platform of laser-beam drilling machine
On, by adjusting laser pulse power and laser beam radius, stainless steel sample block pit surface process 1~3mm of diameter,
The hole of 0.3~1mm of depth, by the way that movable workbench program is arranged, so that hole is evenly distributed on stainless steel sample block surface,
Hole area accounts for the 15%~25% of stainless steel watch area simultaneously；
Step 4, plug fills out aluminium powder in the hole on the stainless steel sample block surface after step 3 laser boring, and in stainless steel
The surface of punching spreads a thin layer aluminium powder, with a thickness of 0.1~1mm, then aluminium bronze coupon is placed in the stainless steel for being covered with aluminium powder
Above coupon, i.e., in pit (as shown in Figure 2), the liquid-solid connection of microcell, specific operation process are carried out under low temperature later are as follows:
Low vacuum is taken out to furnace body to be heated after vacuum degree reaches 1~10Pa in furnace with the heating speed of 10~20 DEG C/min, when
When temperature reaches 700~800 DEG C, apply 3~5MPa 20~60min of pressure heat insulating after furnace cooling to get to aluminium bronze-no
Become rusty bimetal copper-steel composite material.
A kind of law temperature joining method of aluminium bronze and stainless steel of the present invention, by the liquid-solid diffusion of microcell realize aluminium bronze and
The metallurgical bonding of two kinds of materials of stainless steel；Meanwhile lower connection temperature when not only avoiding high temperature stainless steel crystallite dimension it is long
Greatly, so that the intensity of stainless steel is guaranteed, and production cost is reduced, interface bond strength is finally obtained with low cost
Stable, excellent material performance near combined area aluminium bronze-rustless steel double-metal composite material.
Embodiment 1
Step 1, the stainless steel bars that material is 1Cr18Ni9Ti oxide layer post-processing is machined out to deposit at surface
In the coupon of Φ 28mm × 35mm of Φ 26mm × 5mm pit；Aluminium bronze bar is cut into Φ 24mm × 30mm's
Coupon.
Step 2, first with 600#~1000#The stainless steel sample block and aluminium bronze coupon that sand paper grinding process step 1 obtains
Surface, then surface and oil contaminant is wiped clean with soft cloth or paper, is immersed in alcohol reagent progress ultrasonic wave vibration later
10min is swung, remaining greasy dirt is removed；
Step 3, the stainless steel sample block after step 2 cleaning is mounted on to the three-coordinate moving operating platform of laser-beam drilling machine
On, by adjusting laser pulse power and laser beam radius, diameter 3mm, depth are processed in stainless steel sample block pit surface
The hole for spending 1mm, by the way that movable workbench program is arranged, so that hole is evenly distributed on stainless steel sample block surface, while hole
Hole area accounts for the 15% of stainless steel watch area；
Step 4, plug fills out aluminium powder in the hole on the stainless steel sample block surface after step 3 laser boring, and in stainless steel
The surface of punching spreads a thin layer aluminium powder, with a thickness of 1mm, then aluminium bronze coupon is placed in the stainless steel sample block for being covered with aluminium powder
Top carries out the liquid-solid connection of microcell, specific operation process under low temperature later are as follows: low vacuum is taken out to furnace body, when vacuum degree in furnace
It after reaching 10Pa, is heated with the heating speed of 10 DEG C/min, when temperature reaches 700 DEG C, applies the pressure heat insulating of 5MPa
After 60min furnace cooling to get arrive aluminium bronze-rustless steel double-metal composite material.
Embodiment 2
Step 1, the stainless steel bars that material is 1Cr18Ni9Ti oxide layer post-processing is machined out to deposit at surface
In the coupon of Φ 28mm × 35mm of Φ 26mm × 5mm pit；Aluminium bronze bar is cut into Φ 24mm × 30mm's
Coupon.
Step 2, first with 600#~1000#The stainless steel sample block and aluminium bronze coupon that sand paper grinding process step 1 obtains
Surface, then surface and oil contaminant is wiped clean with soft cloth or paper, is immersed in alcohol reagent progress ultrasonic wave vibration later
20min is swung, remaining greasy dirt is removed；
Step 3, the stainless steel sample block after step 2 cleaning is mounted on to the three-coordinate moving operating platform of laser-beam drilling machine
On, by adjusting laser pulse power and laser beam radius, diameter 2mm, depth are processed in stainless steel sample block pit surface
The hole for spending 0.5mm, by the way that movable workbench program is arranged, so that hole is evenly distributed on stainless steel sample block surface, simultaneously
Hole area accounts for the 20% of stainless steel watch area；
Step 4, plug fills out aluminium powder in the hole on the stainless steel sample block surface after step 3 laser boring, and in stainless steel
The surface of punching spreads a thin layer aluminium powder, with a thickness of 0.8mm, then aluminium bronze coupon is placed in the stainless steel sample for being covered with aluminium powder
Above block, the liquid-solid connection of microcell, specific operation process are carried out under low temperature later are as follows: low vacuum is taken out to furnace body, when vacuum in furnace
After degree reaches 5Pa, is heated with the heating speed of 15 DEG C/min, when temperature reaches 750 DEG C, apply the pressure heat insulating of 4MPa
After 40min furnace cooling to get arrive aluminium bronze-rustless steel double-metal composite material.
Embodiment 3
Step 1, the stainless steel bars that material is 1Cr18Ni9Ti oxide layer post-processing is machined out to deposit at surface
In the coupon of Φ 28mm × 35mm of Φ 26mm × 5mm pit；Aluminium bronze bar is cut into Φ 24mm × 30mm's
Coupon.
Step 2, first with 600#~1000#The stainless steel sample block and aluminium bronze coupon that sand paper grinding process step 1 obtains
Surface, then surface and oil contaminant is wiped clean with soft cloth or paper, is immersed in alcohol reagent progress ultrasonic wave vibration later
30min is swung, remaining greasy dirt is removed；
Step 3, the stainless steel sample block after step 2 cleaning is mounted on to the three-coordinate moving operating platform of laser-beam drilling machine
On, by adjusting laser pulse power and laser beam radius, diameter 1mm, depth are processed in stainless steel sample block pit surface
The hole for spending 0.3mm, by the way that movable workbench program is arranged, so that hole is evenly distributed on stainless steel sample block surface, simultaneously
Hole area accounts for the 25% of stainless steel watch area；
Step 4, plug fills out aluminium powder in the hole on the stainless steel sample block surface after step 3 laser boring, and in stainless steel
The surface of punching spreads a thin layer aluminium powder, with a thickness of 0.5mm, then aluminium bronze coupon is placed in the stainless steel sample for being covered with aluminium powder
Above block, the liquid-solid connection of microcell, specific operation process are carried out under low temperature later are as follows: low vacuum is taken out to furnace body, when vacuum in furnace
After degree reaches 1Pa, is heated with the heating speed of 20 DEG C/min, when temperature reaches 800 DEG C, apply the pressure heat insulating of 3MPa
After 20min furnace cooling to get arrive aluminium bronze-rustless steel double-metal composite material.
Embodiment 4
Step 1, the stainless steel bars that material is 1Cr18Ni9Ti oxide layer post-processing is machined out to deposit at surface
In the coupon of Φ 28mm × 35mm of Φ 26mm × 5mm pit；Aluminium bronze bar is cut into Φ 24mm × 30mm's
Coupon.
Step 2, first with 600#~1000#The stainless steel sample block and aluminium bronze coupon that sand paper grinding process step 1 obtains
Surface, then surface and oil contaminant is wiped clean with soft cloth or paper, is immersed in alcohol reagent progress ultrasonic wave vibration later
15min is swung, remaining greasy dirt is removed；
Step 3, the stainless steel sample block after step 2 cleaning is mounted on to the three-coordinate moving operating platform of laser-beam drilling machine
On, by adjusting laser pulse power and laser beam radius, stainless steel sample block pit surface process diameter 1.5mm,
The hole of depth 0.4mm, by the way that movable workbench program is arranged, so that hole is evenly distributed on stainless steel sample block surface, together
When hole area account for the 20% of stainless steel watch area；
Step 4, plug fills out aluminium powder in the hole on the stainless steel sample block surface after step 3 laser boring, and in stainless steel
The surface of punching spreads a thin layer aluminium powder, with a thickness of 0.3mm, then aluminium bronze coupon is placed in the stainless steel sample for being covered with aluminium powder
Above block, the liquid-solid connection of microcell, specific operation process are carried out under low temperature later are as follows: low vacuum is taken out to furnace body, when vacuum in furnace
It after degree reaches 3Pa, is heated with the heating speed of 12 DEG C/min, when temperature reaches 730 DEG C, the pressure for applying 4.5MPa is protected
After warm 50min furnace cooling to get arrive aluminium bronze-rustless steel double-metal composite material.
Embodiment 5
Step 1, the stainless steel bars that material is 1Cr18Ni9Ti oxide layer post-processing is machined out to deposit at surface
In the coupon of Φ 28mm × 35mm of Φ 26mm × 5mm pit；Aluminium bronze bar is cut into Φ 24mm × 30mm's
Coupon.
Step 2, first with 600#~1000#The stainless steel sample block and aluminium bronze coupon that sand paper grinding process step 1 obtains
Surface, then surface and oil contaminant is wiped clean with soft cloth or paper, is immersed in alcohol reagent progress ultrasonic wave vibration later
25min is swung, remaining greasy dirt is removed；
Step 3, the stainless steel sample block after step 2 cleaning is mounted on to the three-coordinate moving operating platform of laser-beam drilling machine
On, by adjusting laser pulse power and laser beam radius, stainless steel sample block pit surface process diameter 2.5mm,
The hole of depth 0.7mm, by the way that movable workbench program is arranged, so that hole is evenly distributed on stainless steel sample block surface, together
When hole area account for the 25% of stainless steel watch area；
Step 4, plug fills out aluminium powder in the hole on the stainless steel sample block surface after step 3 laser boring, and in stainless steel
The surface of punching spreads a thin layer aluminium powder, with a thickness of 0.1mm, then aluminium bronze is placed in above the stainless steel for being covered with aluminium powder, later
The liquid-solid connection of microcell, specific operation process are carried out under low temperature are as follows: low vacuum is taken out to furnace body, when vacuum degree reaches 7Pa in furnace
Afterwards, it is heated with the heating speed of 18 DEG C/min, when temperature reaches 7800 DEG C, applies the pressure heat insulating 30min of 3.5MPa
Afterwards furnace cooling to get arrive aluminium bronze-rustless steel double-metal composite material.
Claims (7)
1. a kind of law temperature joining method of aluminium bronze and stainless steel, which is characterized in that be specifically implemented according to the following steps:
Step 1, surface clean is carried out to aluminium bronze coupon and stainless steel sample block；
Step 2, aluminium bronze coupon and the combination of stainless steel sample block:
Stainless steel sample block after cleaning upper surface processing diameter be 1~3mm, the aperture that depth is 0.3~1mm, Kong Jun
Even to be distributed in stainless steel sample block upper surface, the area in hole accounts for the 15%~25% of stainless steel upper surface area；And it is filled out in hole
Aluminium powder is filled, then spreads aluminium powder in upper surface, and aluminium bronze coupon is placed in the upper surface of stainless steel sample block；Step 3, to step
The rapid 2 aluminium bronze coupons combined and stainless steel sample block carry out the liquid-solid connection of microcell at low temperature to get aluminium bronze-is arrived
Rustless steel double-metal composite material.
2. the law temperature joining method of a kind of aluminium bronze according to claim 1 and stainless steel, which is characterized in that the step
The surface clean of aluminium bronze coupon and stainless steel sample block in 1, specifically: first with 600#~1000#Sand paper grinding process is stainless
Steel curved beam blocks and aluminium bronze coupon surface, surface and oil contaminant is then wiped clean with soft cloth or paper, be immersed in wine later
10~30min of supersonic oscillations is carried out in smart reagent, removes remaining greasy dirt.
3. the law temperature joining method of a kind of aluminium bronze according to claim 1 and stainless steel, which is characterized in that the step
Stainless steel sample block upper surface is machined with the pit of invagination along edge in 2, and hole is located in pit, and aluminium bronze coupon is located at pit
It is interior.
4. the law temperature joining method of a kind of aluminium bronze according to claim 1 and stainless steel, which is characterized in that the step
The spread aluminium powder of stainless steel sample block pit surface is in 2 with a thickness of 0.1~1mm.
5. the law temperature joining method of a kind of aluminium bronze according to claim 1 and stainless steel, which is characterized in that the step
3 specifically: the aluminium bronze coupon combined and stainless steel sample block are placed in heating furnace, vacuumized, to aluminium bronze sample
Block and stainless steel sample block are heated, when temperature reaches 700~800 DEG C, apply 3~5MPa pressure heat insulating 20~
After 60min, furnace cooling.
6. the law temperature joining method of a kind of aluminium bronze according to claim 5 and stainless steel, which is characterized in that the heating
Heating rate is 10~20 DEG C/min.
7. the law temperature joining method of a kind of aluminium bronze according to claim 5 and stainless steel, which is characterized in that described to take out very
After sky in furnace vacuum degree in 1~10Pa.
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|---|---|---|---|---|
| JPH0397815A (en) * | 1989-09-08 | 1991-04-23 | Kuroki Kogyosho:Kk | Insert material for joining |
| CN103008873A (en) * | 2012-12-24 | 2013-04-03 | 黄山学院 | Method and device for improving surface performance of packing auger blade steel for mine |
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| CN101745736B (en) * | 2009-12-23 | 2011-06-15 | 西北工业大学 | Diffusion welding method of copper alloy and stainless steel |
| CN103252572B (en) * | 2013-05-10 | 2015-02-04 | 山东大学 | Transient liquid phase diffusion bonding process of molybdenum copper alloy and stainless steel |
| CN103722294B (en) * | 2013-11-29 | 2016-01-27 | 西安理工大学 | A kind of chromiumcopper and stainless method of attachment |
| CN105798450A (en) * | 2016-05-31 | 2016-07-27 | 浙江三瑞铜业有限公司 | Instant liquid-phase diffusion connecting process of molybdenum-copper alloy and stainless steel |
| CN106271033B (en) * | 2016-08-28 | 2019-01-08 | 中航力源液压股份有限公司 | A kind of diffusion welding method of tin bronze and steel welding construction |
| CN106271013B (en) * | 2016-08-30 | 2019-05-07 | 郑州机械研究所有限公司 | A kind of low vacuum diffusion welding method of copper and copper alloy and steel |
| CN107127441A (en) * | 2017-06-16 | 2017-09-05 | 中国人民解放军第五七九工厂 | A kind of diffusion welding method of structural steel and copper alloy banjo fixing butt jointing |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0397815A (en) * | 1989-09-08 | 1991-04-23 | Kuroki Kogyosho:Kk | Insert material for joining |
| CN103008873A (en) * | 2012-12-24 | 2013-04-03 | 黄山学院 | Method and device for improving surface performance of packing auger blade steel for mine |
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