CN109676235A - A kind of TiC hard alloy/carbon steel Explosive Welding Composite Plates - Google Patents
A kind of TiC hard alloy/carbon steel Explosive Welding Composite Plates Download PDFInfo
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- CN109676235A CN109676235A CN201710972010.5A CN201710972010A CN109676235A CN 109676235 A CN109676235 A CN 109676235A CN 201710972010 A CN201710972010 A CN 201710972010A CN 109676235 A CN109676235 A CN 109676235A
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- carbon steel
- hard alloy
- tic
- explosive welding
- composite plates
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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
- B23K20/06—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating by means of high energy impulses, e.g. magnetic energy
- B23K20/08—Explosive welding
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Pressure Welding/Diffusion-Bonding (AREA)
Abstract
In order to improve hardness, the wearability of hard alloy, it is prepared for a kind of TiC hard alloy/carbon steel Explosive Welding Composite Plates.Use TiC hard alloy and medium carbon steel plate, the carbon steel powder with pearlitic structrure for raw material, TiC hard alloy/carbon steel Explosive Welding Composite Plates, there is an interrupted transition zone on TiC hard alloy/carbon steel Explosive Welding Composite Plates interface, about 10 μm of thickness, to be nanocrystalline in layer, layer composition is mutually mainly ferrite, a small amount of austenite and TiC.It can see apparent streamline shape tissue signature in nearly interface steel side, which reduces at lath martensite, pearlite synusia spacing, is in streamline distribution.Obtained TiC hard alloy/carbon steel Explosive Welding Composite Plates, hardness, densification degree, bending strength are all increased dramatically.The present invention can provide a kind of new production technology to prepare high performance TiC hard alloy/carbon steel composite board.
Description
Technical field
The present invention relates to a kind of cemented carbide material more particularly to a kind of TiC hard alloy/carbon steel explosive welding are compound
Plate.
Background technique
Hard alloy be by one or more high rigidity, high-modulus interstitial compound (usually WC and transition-metal Fe,
Co, Ni or its alloy) composition composite material, WC-Co hard alloy is high with its hardness, red hardness is high, compression strength is high, wear-resisting
Property is good, and corrosion resistance and inoxidizability are good, be widely used in cutting tool, mining tool, mold, measurer, wear part and
The industrial circles such as mechanical seal, referred to as " tooth of modern industry ".Hard alloy belongs to fragile material, and hardness and strength are
Contradiction between wearability and toughness is always to perplex the principal element of its development.
TiC is light grey, and cubic system is not soluble in water, has very high chemical stability, hardly rises with hydrochloric acid, sulfuric acid
Chemical reaction, but it can be dissolved in chloroazotic acid, in nitric acid and hydrofluoric acid, also it is dissolved in the solution of basic anhydride.TiC is tool
There is the steel gray crystal of metallic luster, belong to NaCl type face-centred cubic structure, lattice constant 0.4329nm, space group is
Fm3m, carbon atom and titanium atom are of equal value on lattice sites, with very strong Covalent bonding together between TiC atom, are had similar
Several characteristics of metal, such as high fusing point, boiling point and hardness, hardness are only second to diamond, there is good thermally conductive and electric conductivity,
Superconductivity is even shown when temperature is extremely low.Therefore, TiC be widely used in manufacture cermet, heat-resisting alloy, hard alloy,
Anti-friction material, high-temperature radiation material and other high-temperature vacuum devices, with the composite diphase material of its preparation in machining, metallurgical mine
The fields such as production, space flight and fusion reactor have a wide range of applications.
Summary of the invention
The purpose of the invention is to improve the hardness of hard alloy, wearability, a kind of TiC hard alloy/carbon is devised
Steel Explosive Welding Composite Plates.
The technical solution adopted by the present invention to solve the technical problems is:
It includes: TiC hard alloy and medium carbon steel plate that TiC hard alloy/carbon steel Explosive Welding Composite Plates, which prepare raw material, is had
The carbon steel powder of pearlitic structrure.
TiC hard alloy/carbon steel Explosive Welding Composite Plates preparation step are as follows: medium carbon steel makees substrate, and TiC does compound plate.It is multiple
Plate and substrate are spaced apart, and explosive is laid on compound plate, using one end detonation method, are welded.From the composite plate after welding
On along detonation direction and perpendicular to weld interface cut blocky sample and the thin slice of 0.3mm.
TiC hard alloy/carbon steel Explosive Welding Composite Plates detecting step are as follows: Interface Microstructure is seen using scanning electron microscope
It examines, Elemental redistribution is analyzed using X-ray energy spectrometer, using transmission electron microscope observing Interface Microstructure and carries out phase structure point
Analysis.
TiC hard alloy/carbon steel the Explosive Welding Composite Plates, TiC hard alloy/carbon steel Explosive Welding Composite Plates circle
Have an interrupted transition zone on face, about 10 μm of thickness, be in layer it is nanocrystalline, layer composition is mutually mainly ferrite, a small amount of Ovshinsky
Body and TiC.
TiC hard alloy/carbon steel the Explosive Welding Composite Plates, the component of two kinds of materials occur near interface
Counterdiffusion, spreading most apparent element across interface is Ti, to about 15 μm of diffusion length of steel side.
TiC hard alloy/carbon steel the Explosive Welding Composite Plates can see apparent streamline in nearly interface steel side
Shape tissue signature, area's original ferritic transformation reduce at lath martensite, pearlite synusia spacing, are in streamline distribution.
The beneficial effects of the present invention are:
Use TiC hard alloy and medium carbon steel plate, the carbon steel powder with pearlitic structrure for raw material, by one end detonation method
It is successfully prepared TiC hard alloy/carbon steel Explosive Welding Composite Plates with excellent mechanical performance.Wherein, composite plate is welded
The reason of capable of getting a promotion, shows as forming one layer of transition zone in the weld interface of composite plate, which can be good at connecting
Matrix and composite plate.Obtained TiC hard alloy/carbon steel Explosive Welding Composite Plates, hardness, densification degree, bending resistance are strong
Degree is all increased dramatically.The present invention can provide a kind of new life to prepare high performance TiC hard alloy/carbon steel composite board
Production. art.
Specific embodiment
Case study on implementation 1:
It includes: TiC hard alloy and medium carbon steel plate that TiC hard alloy/carbon steel Explosive Welding Composite Plates, which prepare raw material, is had
The carbon steel powder of pearlitic structrure.TiC hard alloy/carbon steel Explosive Welding Composite Plates preparation step are as follows: medium carbon steel makees substrate,
TiC does compound plate.Compound plate and substrate are spaced apart, and explosive is laid on compound plate, are welded.From edge in the composite plate after welding
Detonation direction and blocky sample and the thin slice of 0.28mm are cut perpendicular to weld interface.TiC hard alloy/carbon steel explosive welding is multiple
The detecting step of plywood are as follows: Elemental redistribution is analyzed using X-ray energy spectrometer, and Interface Microstructure uses scanning electron microscopic observation, is adopted
With transmission electron microscope observing Interface Microstructure and carry out Phase Structure Analysis.
Case study on implementation 2:
TiC hard alloy/carbon steel explosive welding compound interface is straight, visible small undulation once in a while, highest wave crest is about
9.88 μm, it can see streamline shape deformation behaviour in the steel side of wave crest.Observation can be more clearly visible that have on interface under high power
The interrupted microcell different from two sides tissue signature.The regional scope is smaller, longest within 110ptm, most it is thick only
10.05 μm, the ingredient of different microcells is roughly the same, predominantly Fe, is secondly C, Ti, Cr.It is more on interface in addition to interrupted transition region
Face is bound directly for TiC hard alloy and carbon steel.
Case study on implementation 3:
The essential element of diffusion is Ti, and average diffusion distance of the Ti element across interface to steel side is 14.5 μm.Carbon is on boundary
Nearby there is a degree of enrichment in face steel side, and Cr element then has a degree of enrichment in interface hard alloy side.Ti element
It is greater than l0.45 μm across interface to the diffusion length of steel side, with this corresponding, in the case where the curve of this region display Fe content is obvious
Drop.
Case study on implementation 4:
Interfacial transition zone is made of nanocrystalline and crystallite, spherical TiC particle and Binder Phase；It is that adjacent TiC is hard between two white lines
The interfacial transition zone of matter alloy, crystal grain very little, about 45nm in the area.The crystal grain of steel plate side is grown up, and micron has been reached
Magnitude, and crystal grain dislocation density is very high in transition region.Diffraction ring all corresponds to the diffraction crystal face of body-centered cubic α-Fe phase；There are also compared with
Weak ring corresponds to face-centered cubic γ-Fe phase, and transition region is made of ferrite, a small amount of austenite and TiC.From product grain it is small and
There are a small amount of γ-Fe can mutually illustrate, which is exceedingly fast.That sees under SEM binds directly face visible faying face under the tem
On also to have one layer nanocrystalline, for no other reason than that it is thinner, light microscopic is not easy to differentiate.
Case study on implementation 5:
Show the observation of TiC hard alloy side there is the dislocation of higher density in the TiC particle of adjacent interface, and has socket of the eye brilliant
The Binder Phase of feature, TiC particle asked shows crystallite feature；Selective electron diffraction and index mark are done to TiC and Binder Phase
It is fixed.Index with footnote t is the diffraction spot of titanium carbide, can be seen that TiC crystal grain from the neat degree of the rule of diffraction spot
Though upper have industry crystal block, orientation does not change.The index of no footnote is the diffraction spot of phase in Binder Phase, is had from diffraction spot
There is circular feature to can be seen that the tiny crystal grains orientation in binding material mixed and disorderly.The pearlite is α phase and M23C6Type carbide group
At two-phase mixture.Between the observation of steel plate side show from the normal tissue of the interface side Jian Gang pass through following tissue change:
α phase recovery and recrystallization one ferrite and pearly-lustre coarse with the approximately parallel lath α phase in interface and streamline shape pearlite one
Body tissue.Demarcating to the electron diffraction pattern in each area proves, the lath α phase at nearly interface has body-centered tetragonal lattice, α phase herein
Feature with martensite, pearlite middle layer flaky carbide is Fe3C.The ferrite at remote interface has body-centered cubic lattic, pearl
Body of light is α iron and Fe3The two-phase mixture of C
Case study on implementation 6:
Interrupted transition region actually exists the fine-grain area of high density dislocation on interface, and the Crack cause in the area is main
It will be there are two types of explaining, first is that explaining is to say the point-by-point bumped substrate of compound plate, two kinds of material surfaces are fast under great impact force action
Fast intense plastic strain is proliferated material dislocation density greatly, and lattice distortion is so that die break, and high speed is touched
Surface layer local melting can be made by hitting the heat generated with rheology, and thin layer fine grained region is formed under conditions of Quench.Second of solution
Releasing is to say that jet stream freezes the inclined impact substrate point-by-point under the driving of explosive detonation due to cladding plate, not only on base, compound plate
Shock wave is formed, meanwhile, the point of impingement occurs moment Adiabatic Shear and forms jet stream, except jet stream particle is largely exhausted from system,
Small part is captured by incoming collision, is compressed between two plates, since the plate cooling rate of room temperature is exceedingly fast, jet flow particles
It is " frozen " and preserves, form interrupted thin layer fine grained region.The core of second of explanation is that jet flow particles is touched by next
The incoming flow hit a little captures and by quickly cooling between two plates, in this case fine grained region have two metal plates oxide or it is external
Field trash, and also have the hyperspin feature that reflux generates, that is, form preceding whirlpool or rear whirlpool.From this experimental result it is found that TiC is hard
Matter alloy/carbon steel explosive welding compound interface is more straight, unmatched whirlpool and rear whirlpool；Fine grained region crystal grain dislocation density is higher simultaneously,
And other field trashes are not found, to illustrate that the generation of fine grained region more meets the first explanation.It is micro- from there are TiC for fine grained region
Particle and the crystal particle scale in the area are small to nanometer scale it can be deduced that instantaneous when TiC hard alloy/carbon steel explosive welding
Temperature may be up to 3150K or more, and instantaneous cooling rate is 10.5~1011Between K/s.The streamline shape of interface steel side is characterized in exploding
When welding, the steel that compound plate and substrate high velocity impact make plasticity good occurs caused by strong plastic flow.From nanocrystalline formation with
And the diffusion of interface element is it is found that hardness and the explosive welding of the biggish TiC steel bonded carbide of brittleness and carbon steel are metallurgical junction
It closes.
Claims (4)
1. a kind of raw material for preparing of TiC hard alloy/carbon steel Explosive Welding Composite Plates includes: TiC hard alloy and intermediate carbon steel sheet
Material, the carbon steel powder with pearlitic structrure.
2. TiC hard alloy/carbon steel Explosive Welding Composite Plates according to claim 1, it is characterized in that TiC hard alloy/
The preparation step of carbon steel Explosive Welding Composite Plates are as follows: medium carbon steel makees substrate, and TiC does compound plate, and compound plate and substrate are spaced apart,
It is laid with explosive on compound plate, using one end detonation method, is welded, along detonation direction and perpendicular to weldering from the composite plate after welding
Border face cuts blocky sample and the thin slice of 0.3mm.
3. TiC hard alloy/carbon steel Explosive Welding Composite Plates according to claim 1, it is characterized in that TiC hard alloy/
The detecting step of carbon steel Explosive Welding Composite Plates are as follows: Interface Microstructure uses scanning electron microscopic observation, and Elemental redistribution uses X-ray
Energy spectrometer analysis using transmission electron microscope observing Interface Microstructure and carries out Phase Structure Analysis.
4. TiC hard alloy/carbon steel Explosive Welding Composite Plates according to claim 1, it is characterized in that the TiC hard
Alloy/carbon steel Explosive Welding Composite Plates has an interrupted transition zone on TiC hard alloy/carbon steel Explosive Welding Composite Plates interface,
About 10 μm of thickness, be in layer it is nanocrystalline, layer composition is mutually mainly ferrite, a small amount of austenite and TiC, the TiC hard
Counterdiffusion has occurred in alloy/carbon steel Explosive Welding Composite Plates, the component of two kinds of materials near interface, spreads across interface
Most apparent element is Ti, and to about 15 μm of diffusion length of steel side, the TiC hard alloy/carbon steel explosive welding is compound
Plate can see apparent streamline shape tissue signature in nearly interface steel side, area's original ferritic transformation at lath martensite,
Pearlite synusia spacing reduces, and is in streamline distribution.
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| CN201710972010.5A CN109676235A (en) | 2017-10-18 | 2017-10-18 | A kind of TiC hard alloy/carbon steel Explosive Welding Composite Plates |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115475938A (en) * | 2022-09-23 | 2022-12-16 | 安徽工程大学 | Copper-based diamond composite board/strip and preparation method thereof |
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2017
- 2017-10-18 CN CN201710972010.5A patent/CN109676235A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115475938A (en) * | 2022-09-23 | 2022-12-16 | 安徽工程大学 | Copper-based diamond composite board/strip and preparation method thereof |
| CN115475938B (en) * | 2022-09-23 | 2024-03-08 | 安徽工程大学 | Copper-based diamond composite board/strip and preparation method thereof |
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Application publication date: 20190426 |