CN109676210A - A kind of hard alloy-drill rod plumb joint - Google Patents
A kind of hard alloy-drill rod plumb joint Download PDFInfo
- Publication number
- CN109676210A CN109676210A CN201710972007.3A CN201710972007A CN109676210A CN 109676210 A CN109676210 A CN 109676210A CN 201710972007 A CN201710972007 A CN 201710972007A CN 109676210 A CN109676210 A CN 109676210A
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- CN
- China
- Prior art keywords
- hard alloy
- drill rod
- plumb joint
- rod plumb
- ball
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F5/00—Manufacture of workpieces or articles from metallic powder characterised by the special shape of the product
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F9/00—Making metallic powder or suspensions thereof
- B22F9/02—Making metallic powder or suspensions thereof using physical processes
- B22F9/04—Making metallic powder or suspensions thereof using physical processes starting from solid material, e.g. by crushing, grinding or milling
-
- 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
- B23K1/00—Soldering, e.g. brazing, or unsoldering
- B23K1/002—Soldering by means of induction heating
-
- 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
- B23K1/00—Soldering, e.g. brazing, or unsoldering
- B23K1/06—Soldering, e.g. brazing, or unsoldering making use of vibrations, e.g. supersonic vibrations
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F9/00—Making metallic powder or suspensions thereof
- B22F9/02—Making metallic powder or suspensions thereof using physical processes
- B22F9/04—Making metallic powder or suspensions thereof using physical processes starting from solid material, e.g. by crushing, grinding or milling
- B22F2009/043—Making metallic powder or suspensions thereof using physical processes starting from solid material, e.g. by crushing, grinding or milling by ball milling
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Earth Drilling (AREA)
Abstract
In order to improve hardness, the wearability of soldered fitting, it is prepared for a kind of hard alloy-drill rod plumb joint.Use YG15 hard alloy and 5Cr-Mo steel for raw material, hard alloy-drill rod plumb joint, the addition of the solder containing Ni is able to ascend the mechanical property of hard alloy.Its mechanism for promoting Cemented Carbide Properties shows as that one layer of solid solution layer with strong mechanical performance can be formed between matrix and force environment.Hard alloy obtained is compared with using without hard alloy prepared by Ni solder, and mechanical property will promote 20% or so.Obtained hard alloy-drill rod plumb joint, hardness, densification degree, bending strength are all increased dramatically.The present invention can provide a kind of new production technology to prepare high performance soldered fitting.
Description
Technical field
The present invention relates to a kind of cemented carbide material more particularly to a kind of hard alloy-drill rod plumb joints.
Background technique
Hard alloy is the method using powder metallurgy, using infusible compounds such as WC, TiC, TaC as matrix, with transition group
Metal is the alloy that binding metal is prepared, with higher-strength, impact resistance and preferable wearability, therefore in knife
The fields such as tool, wear part, cold forming tool, which have, to be widely applied.WC-Co hard alloy is known as " industrial tooth " how
It is targetedly the research hotspot in the field according to purposes research or development high performance material.The toughness of hard alloy is lower, often
It is used with drill rod postwelding.
Soldering is to make solder using metal material more low-melting than base material, and weldment and solder heat are melted to higher than solder
Point is lower than base material fusion temperature, soaks base material using liquid solder, fills play movement and realizes connection with base material phase counterdiffusion
The method of weldment.Brazing deformation is small, connector smooth and beautiful appearance, is suitable for accurate welding, complexity and the component being made of different materials,
Such as honeycomb panel, turbine blade, hard alloy cutter and printed circuit board.Careful processing must be carried out to workpiece before soldering
Guarantee interface fit-up gap except degreasing and blocked up oxidation film with stringent cleaning.Gap is generally required in 0.01~0.1 milli
Between rice.
Summary of the invention
The purpose of the invention is to improve the hardness of soldered fitting, wearability, a kind of hard alloy-drill rod weldering is devised
Connector.
The technical solution adopted by the present invention to solve the technical problems is:
Hard alloy-drill rod plumb joint prepare raw material include: base material thickness 3.5mm, amount containing Co be 15% YG15 hard alloy and
The 35Cr-Mo steel of base material thickness 10mm.
Hard alloy-drill rod plumb joint preparation step are as follows: by raw material by experimental design weighing, ingredient, after preparing
It pours into and carries out wet-milling in hard alloy ball mill, ball-milling medium is the sintered carbide ball of diameter 25mm, drum's speed of rotation 90r/
Min, carbon tetrachloride additive amount are 210mL/kg, and ratio of grinding media to material 7:1, Ball-milling Time is for 24 hours.After ball milling, by grain obtained
Material is dried in vacuo, drying time 50min, and drying temperature is 40 DEG C, and binder is then added and pelletizes.By what is made
Powder, which adds to, carries out compression moulding in hydraulic press, be subsequently placed into vacuum sintering furnace and be sintered, and sintering temperature is 1450 DEG C, protects
The warm time is 70min.Hardmetal samples obtained are subjected to high-frequency induction brazing and ultrasonic assistant brazing.
Hard alloy-drill rod plumb joint detecting step are as follows: quality F210 type electronic balance, density use Archimedes
Drainage, material phase analysis D8Advance type X-ray diffractometer, microstructure are sent out using NanoSEM430 ultrahigh resolution field
Scanning electron microscope, hardness and fracture toughness is penetrated to measure by Vickers indentation method.
The hard alloy-drill rod plumb joint, the addition of the solder containing Ni are able to ascend the mechanical property of hard alloy.Its
The mechanism for promoting Cemented Carbide Properties shows as that one layer of consolidating with strong mechanical performance can be formed between matrix and force environment
Solution layer.Hard alloy obtained is compared with using without hard alloy prepared by Ni solder, and mechanical property will promote 20%
Left and right.
The hard alloy-drill rod plumb joint, brazing temperature have large effect to the performance of hard alloy.Soldering temperature
Degree can influence that sintering, the diffusion of Ni element leads to hard to influence the mechanical property of interface solid solution layer in brazing process
The mechanical property of alloy changes.
The hard alloy-drill rod plumb joint, using containing 4.7%Ni solder and 1450 DEG C of sintering temperature can make
The standby good soldering street corner of comprehensive performance, the shear strength of connector out can reach 357MPa, much higher than common process preparation
Soldered fitting.
The beneficial effects of the present invention are:
Use YG15 hard alloy and 5Cr-Mo steel for raw material, by ingredient, ball milling, drying, granulation, forming, sintering, high frequency sense
It should be brazed and ultrasonic assistant brazing technique is successfully prepared the hard alloy with excellent mechanical performance-drill rod plumb joint.Its
In, the addition of the solder containing Ni can form one layer of solid solution layer with strong mechanical performance, soldering between matrix and external environment
Temperature can influence the diffusion of Ni element in brazing process, both, which is combined, can be made the soldering with excellent comprehensive performance
Connector.Obtained hard alloy-drill rod plumb joint, hardness, densification degree, bending strength are all increased dramatically.This
Invention can provide a kind of new production technology to prepare high performance soldered fitting.
Specific embodiment
Case study on implementation 1:
It includes: base material thickness 2.76mm, the YG15 hard alloy that amount containing Co is 20% that hard alloy-drill rod plumb joint, which prepares raw material,
With the 35Cr-Mo steel of base material thickness 18mm.Hard alloy-drill rod plumb joint preparation step are as follows: raw material is pressed into experimental design
Weighing, ingredient, pour into after preparing and carry out wet-milling in hard alloy ball mill, and ball-milling medium is the sintered carbide ball of diameter 22mm,
Drum's speed of rotation is 95r/min, and carbon tetrachloride additive amount is 234mL/kg, and ratio of grinding media to material 5:1, Ball-milling Time is for 24 hours.Ball milling knot
Pellet obtained is dried in vacuo by Shu Hou, drying time 75min, drying temperature be 55 DEG C, then be added binder into
Row granulation.The powder made is added to and carries out compression moulding in hydraulic press, is subsequently placed into vacuum sintering furnace and is sintered, is sintered
Temperature is 1325 DEG C, soaking time 75min.Hard alloy-drill rod plumb joint detecting step are as follows: quality F210 type electronics
Balance, density use Archimedes's drainage, material phase analysis D8Advance type X-ray diffractometer, and microstructure uses
NanoSEM430 ultrahigh resolution field emission scanning electron microscope, hardness and fracture toughness are measured by Vickers indentation method.
Case study on implementation 2:
When being free of Ni element in solder, entire brazed seam is formed by 3 kinds, dark-grey form and aspectβ- Cu phase, light gray form and aspectα- Ag phase
And the eutectic structure of striated is constituted.Whereinβ- Cu is mutually distributed in brazed seam center, and discontinuously divides along carbide interface side
Cloth.Use Ni mass fraction for the connector pattern after 3.14% solder brazing, it is seen that brazed seam is still by the group texture of 3 kinds of forms
At, but the ingredient of the phase of Dark grey is changed, byβ- Cu phase transformation in order toα- Cu phase.Using connector brazed seam obtained by 0Ni solder
In,β- Cu is mutually most of to be distributed at brazed seam in big bulk is at random；When solder when containing 2.65%Ni, can obviously observeα-Cu
Phase size becomes smaller, and is in small bulk, and be observed thatαThe phenomenon that opposite brazed seam metal of-Cu and the interface 35CrMo are assembled.
Microstructure of Joint when solder Ni mass fraction is 4.65% promotes Co element due to increasing for Ni element mass fraction
Interface aggregation has been respectively formed one layer significantly in solder metal and base material two sides interfaceα- Cu solid solution layer, bilateral interface
Solid solution layer tissue can significantly improve the bond strength at interface.The shear strength of connector with ni content in solder increase
And improve, when the ni content in solder is 4.60%, brazing temperature is 855 DEG C, the shear strength of connector when soldering keeps the temperature 45s
Reach maximum value 289MPa.
Case study on implementation 3:
Brazing temperature range is between 705 ~ 845 DEG C, with the raising of brazing temperature, after the cutting performance of connector first increases therewith
It reduces, when brazing temperature is 725 DEG C, the shear strength of connector reaches peak 365MPa.It is different when using 4.65% solder
The interface bilateral of brazing temperature lower contact has been respectively formed blackα- Cu solid solution layer.Among brazed seam mainly byα- Cu solid solution,α- Ag solid solution and eutectic structure are constituted.As temperature increases, brazed seam centerαThe aggregation of-Cu solid solution is grown in double interfaces.
Co element is dissolved into brazed seam when carbide quartz welding, the poor area Co is occurred in hard alloy side, is reduced the mechanical property of connector.
Case study on implementation 4:
When temperature is 745 DEG C, brazing temperature is lower, and a small amount of Ni elements diffusion to base material, Co element meltage is little, and the poor area Co is wide
Degree is only 0.88 μm；As brazing temperature is increased to 795 DEG C, the enhancing of Ni elements diffusion, the poor area Co is expanded to 1.88 μm, leads to power
Learn performance decline.When temperature is increased to 845 DEG C, in brazed seamαThe Fe member largely spread by steel side is detected in-Cu solid solution
Element consumes the Ni element in brazed seam, inhibits the dissolution of Co element, and poor Co sector width is reduced to 1.04 μm, this is mechanical property
The reason of this temperature is improved again.
Case study on implementation 5:
At 735 DEG C of brazing temperature, apply ultrasonic wave 45s, the 381MPa when shear strength of connector is by high-frequency induction brazing is improved
To 395MPa, mechanical property improves 5.45%.35CrMo steel side forms continuous solid solution layer, and has in hard alloy sideαHard alloy side interface is amplified in the aggregation of-Cu solid solution, and solder soaks well the WC particle in hard alloy, and interface cohesion is good
It is good seamless.Brazed seam center mainly byα- Cu solid solution,α- Ag solid solution and eutectic structure are constituted.It is found in brazed seam simultaneously
A small amount of WC particle is migrated from hard alloy side into weld seam, and the EDS line scanning distribution of weld seam shows the Co in hard alloy
Element is largely dissolved to brazed seam, and forms 16.7 μm of areas Pin Co so that WC departing from Co element bonding and become free
WC is migrated under ultrasonic activation to brazed seam.
Claims (4)
1. it includes: base material thickness 3.5mm, the YG15 hard that amount containing Co is 15% that a kind of hard alloy-drill rod plumb joint, which prepares raw material,
The 35Cr-Mo steel of alloy and base material thickness 10mm.
2. hard alloy according to claim 1-drill rod plumb joint, it is characterized in that hard alloy-drill rod plumb joint system
Standby step are as follows: by raw material by experimental design weighing, ingredient, poured into after preparing and carry out wet-milling, ball in hard alloy ball mill
Grinding media is the sintered carbide ball of diameter 25mm, and drum's speed of rotation 90r/min, carbon tetrachloride additive amount is 210mL/kg, ball
For material than being 7:1, Ball-milling Time is for 24 hours, after ball milling, pellet obtained to be dried in vacuo, drying time 50min,
Drying temperature is 40 DEG C, and binder is then added and pelletizes, the powder made is added to and carries out compression moulding in hydraulic press, with
After be put into vacuum sintering furnace and be sintered, sintering temperature is 1450 DEG C, soaking time 70min, by hard alloy obtained
Sample carries out high-frequency induction brazing and ultrasonic assistant brazing.
3. hard alloy according to claim 1-drill rod plumb joint, it is characterized in that the inspection of hard alloy-drill rod plumb joint
Survey step are as follows: quality F210 type electronic balance, density use Archimedes's drainage, and material phase analysis is penetrated with D8Advance type X
Line diffractometer, microstructure use NanoSEM430 ultrahigh resolution field emission scanning electron microscope, and hardness and fracture toughness pass through
The measurement of Vickers indentation method.
4. hard alloy according to claim 1-drill rod plumb joint, it is characterized in that the hard alloy-drill rod welding
Head, the addition of the solder containing Ni are able to ascend the mechanical property of hard alloy, and the mechanism for promoting Cemented Carbide Properties shows as energy
Enough that one layer of solid solution layer with strong mechanical performance is formed between matrix and force environment, hard alloy obtained is compared and use
Without hard alloy prepared by Ni solder, mechanical property will promote 20% or so, the hard alloy-drill rod plumb joint,
Brazing temperature has a large effect to the performance of hard alloy, and brazing temperature can influence sintering, Ni element in brazing process
Diffusion, to influence the mechanical property of interface solid solution layer, causes the mechanical property of hard alloy to change, the hard
Alloy-drill rod plumb joint, using containing 4.7%Ni solder and 1450 DEG C of sintering temperature can to prepare comprehensive performance good
It is brazed street corner, the shear strength of connector can reach 357MPa, much higher than the soldered fitting of common process preparation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710972007.3A CN109676210A (en) | 2017-10-18 | 2017-10-18 | A kind of hard alloy-drill rod plumb joint |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710972007.3A CN109676210A (en) | 2017-10-18 | 2017-10-18 | A kind of hard alloy-drill rod plumb joint |
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| Publication Number | Publication Date |
|---|---|
| CN109676210A true CN109676210A (en) | 2019-04-26 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710972007.3A Pending CN109676210A (en) | 2017-10-18 | 2017-10-18 | A kind of hard alloy-drill rod plumb joint |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115055862A (en) * | 2022-06-20 | 2022-09-16 | 河北工业大学 | Preparation method and application of brazing filler metal for connecting WC-Co hard alloy and steel at low temperature |
-
2017
- 2017-10-18 CN CN201710972007.3A patent/CN109676210A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115055862A (en) * | 2022-06-20 | 2022-09-16 | 河北工业大学 | Preparation method and application of brazing filler metal for connecting WC-Co hard alloy and steel at low temperature |
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| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20190426 |
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| WD01 | Invention patent application deemed withdrawn after publication |