CN109807334A - The high titanium of high-quality and large scale class (including sheet) hard metal article processing technology - Google Patents
The high titanium of high-quality and large scale class (including sheet) hard metal article processing technology Download PDFInfo
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- CN109807334A CN109807334A CN201711160985.4A CN201711160985A CN109807334A CN 109807334 A CN109807334 A CN 109807334A CN 201711160985 A CN201711160985 A CN 201711160985A CN 109807334 A CN109807334 A CN 109807334A
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Abstract
The invention belongs to a kind of high titanium of high-quality and large scale class (including sheet) hard metal article processing technology, including matching Ti based alloy material using Ti powder and waste material, powder by atomization, it crushes and Ti based alloy powder is made, the alloyed powder and waste material are subjected to ingredient again, green compact, sintering, and large scale (including sheet) hard metal article of high Ti content is made.The invention presses purpose product requirement ingredient, green compact, sintering due to using titanium-base alloy waste material that W and part Ti powder is replaced to make raw material and first the Ti based alloy powder of obtained eutectic composition, then with waste material.Product deformation is small, porosity is low to having, and 8.5~13.0%, HRA hard, which can be improved, in bending strength can be improved 0.5~1.0 degree, production cost reduction by 20% or so and can effectively save W, Ti natural resources the features such as.It overcomes background technique or equipment investment is big, productivity is low；Or product deformation is big, bending strength and poor impact resistance；And it cannot be used for the disadvantages such as production thin slice based article.
Description
Technical field
The invention belongs to produce the method for high titanium (Ti) content and Large scale alloy in field of powder metallurgy, especially
A kind of high titanium of high-quality and large scale class (including sheet) hard metal article processing technology.
Background technique
In traditional hard alloy production process, the binder of alloy mainly uses pure Ti (or Ti+Ni) powder, is being sintered
In the process W, C atom into Ti solid solution diffusion and form the eutectic of γ phase, expand to accelerate W, C atom by solid phase to be formed altogether
Brilliant ingredient often needs to improve sintering temperature, sintering temperature is at least increased to exceed to 100 DEG C of eutectic temperature or more, this to pass through
While raising sintering temperature is formed to accelerate liquid phase, it is easy to produce coarse WC alloy structure again, significantly reduces hard alloy
The performances such as intensity；Excellent its is when producing high Ti and Large scale alloy product, due to green body core and table during burning
Face there are certain temperature difference, in addition Ti with WC dissolve in its fusing point reduction, and end dissolve in part Ti molten point it is still higher, because
And cause the temperature-time sum number that Ti with each section generation liquid phase for not dissolving in Ti are dissolved in along green body temperature gradient direction and WC
The consistency of amount is poor, causes green body to shrink uneven, and product deformation is big, especially as the 10wt% that Ti content is more than alloy composition
When, deformation is particularly evident, very causes that product cannot be obtained at all；In addition, W, C atom dissolve one into Ti phase during the sintering process
When precipitation can only the surface WC in a manner of heterogeneous nucleation in crystal grain one precipitation mechanism of this typical dissolution be precipitated again also promote
So that WC grain is grown up, cause the uniformity of alloy structure poor, influences the performance of alloy product.In order to overcome roll, mold class big
Deformation in gauge articles sintering and the problems such as high porosity, it is conventional to use pressure sintering or isostatic sintering mode, to reach
Purpose, but and the disadvantages such as productivity lower, production of articles at high cost expensive there are equipment such as pressure sintering furnaces；And applying
Number it is 98808877.0, discloses a kind of Ti in the patent document of entitled " method for preparing ultrafine tungsten carbide titanium alloy "
Content is the grain growth inhibitor VC and/or Cr that 6~24wt% and total amount of adding are lower than 1.0wt%3C2So that WC, Ti and VC
And/or Cr3C2The machinery tools such as machining tools and broaching tool such as PCB (printed circuit board) are produced by the way that carbon thermal reduction is counter.Using
Although the technology can produce with ultra-fine grain hard alloy cutter, due to joined in alloy composition VC and/or
Cr3C2, the bending strength and impact resistance of alloy product are thus greatly reduced, if large-sized for producing roll etc.
Quick-fried roller accident easily occurs in product, use.In addition, production at present thickness is smaller and the high titanium of diameter (or area) biggish sheet
Hard alloy is to be worn into the production method of thin slice, again then using the biggish sheet body of thickness is first sintered into overcome it
Deformation.Therefore, above-mentioned background technique exists or equipment investment is expensive, productivity is low or product deformation is big, bending strength and resistance to punching
Hitting property is poor, and quick-fried roller accident easily occurs for use process degree；And cannot be used for directly producing the high titanium hard metal article of sheet with
And raw material need to be made using pure W, Ti, high production cost, expend the disadvantages such as natural W, Ti resource.
Summary of the invention
The purpose of the present invention is for disadvantage, a kind of high titanium of high-quality of researching and designing and large scale class existing for background technique
(including sheet) hard metal article processing technology, to reach natural W, Ti resource of saving, make full use of regenerated resources, production
The high titanium of high-quality large scale class (including sheet) hard metal article, reduces equipment investment, improves productivity, effectively drops
The purpose of low production cost.
Solution of the invention is using the titanium-based containing Ti (or Ti+Ni) for meeting industrial production standard after recovery processing
Alloyed scrap is raw material, adds the Ti that eutectic composition is made in Ti powder by the content of required Ti or Ti+Ni using part waste material first
Based alloy powder, then final products are made through wet-milling ingredient, green compact, sintering in the broken pure material of the alloyed powder and titanium-base alloy.Cause
This, the present invention includes:
A: ingredient Ti based alloy mixture: titanium-base alloy waste material is sent into ball mill, according to WC in powder and Ti or
The content of Ti+Ni is added Ti powder and composition is made into containing 16~30wt% of tungsten carbide, the powder that surplus is Ti or Ti+Ni, and wet-milling is mixed
After closing 16~48 hours, drying device drying is sent into moisture content 0.5~1.0%, obtains Ti based alloy mixed powder；
B: powder by atomization: above-mentioned mixed powder is placed in melting furnace, is protected in 1300~1400 DEG C of temperature and inert gas
It melted under shield to molten state, be sent into powder by atomization machine the powder for being made that granularity is -60~-160 mesh；
C: it crushes: will be sent by powder obtained by B wet-milling 48~72 hours in ball mill after being -300~-600 mesh to granularity,
Wet-milling mixture is sent into drying device again and is dried to moisture content 0.5~1.0%, Ti based alloy powder is obtained；
D: titanium-base alloy waste material is sent into ball mill by wet-milling ingredient, according to the content of WC in powder and Ti or Ti+Ni, simultaneously
It is added by the requirement that Ti or Ti+Ni content in final product is 10~28wt% through Ti based alloy powder made from C, wet-milling mixing 24
~72 hours, obtain wet-milling mixture；
E: it green compact: by above-mentioned mixture drying, mixes glue after mixing, is pressed into product blank；
F: sintering: will green compact be sent into sintering furnace in, at a temperature of vacuum or hydrogen shield and 1360~1500 DEG C be sintered 6~
12 hours, furnace cooling was up to purpose product.
Above-mentioned drying device is steam or Minton dryer, and drying temperature is 90~120 DEG C.And the gas of powder by atomization
Flow velocity degree >=332m/ seconds, material flow diameterThe product blank that is pressed into is roll, mold class and diameterAnd the blank of the thin slice based article with a thickness of 0.5~3.0mm.
The present invention due to using waste hand alloy material and enough titaniums to crush by melting, spraying legal system powder, wet-milling first
It is 1.0 μm or so of Ti based alloy powder that granularity, which is made, then again using the alloyed powder and waste hand alloy material interworking production roll,
Mold class large scale and sheet hard metal article.Since the Ti in powder has dissolved in WC in advance and generates the Ti of eutectic composition
Based alloy powder, the temperature for forming liquid phase during the sintering process is identical, and liquid phase is quickly generated near the fusing point of eutectic composition, is completed
Sintering, first, overcome background technique due to WC during the sintering process dissolve in the time of Ti, quantity difference, keep sintered body each
The time and quantity of part generation liquid phase are not identical, so as to cause green body contraction is uneven, deformation is big, micropore is more, very cause cannot
Finished product is obtained, especially cannot be used for directly producing the disadvantages such as thin slice based article；Second, hardly due to WC during the sintering process
Again to liquid phase diffusion dissolution, can effectively prevent making WC particle abnormal growth because non-uniform dissolution is precipitated again；Third, using recycling
Treated, and waste hand alloy material replaces pure W and part Ti to make raw material, is not only effectively protected W, Ti natural resources, promotes it
It recycles, and the production cost of product can be made to decline 20% or so.Thus the present invention is for producing high titanium, large scale and thin
Piece shape product are small with deformation, porosity is low, and 8.5~13.0%, HRA hardness, which can be improved, in bending strength can be improved 0.5~1.0
Degree, production cost is low and can effectively save W, Ti natural resources, the features such as promoting it to recycle.
Specific embodiment
Embodiment:
The present embodiment is to produce diameterThickness is 75mm, and the roll that wherein Ti content is 20.0wt% is
Example:
A, preparation Ti based alloy mixture: Ti content for the subgrain waste hand alloy material 26.6kg of 6.0wt% and is put down
Equal granularity is that 1.2 μm of pure Ti powder 73.4kg is placed in ball mill, wet-milling dried after mixing 24 hours to moisture content 0.5~
1.0%, obtain the Ti base mixed powder containing WC25wt%；
B, powder by atomization；Gained mixed powder is placed in electric smelter, in N2Protection and 1380 DEG C at a temperature of be heated to melting
It is sent into atomizer rapidly after melting state, in 400m/ seconds stream pressure 32MPa of air velocity, material flow diameterCondition
The alloy powder that granularity is -120 mesh is made in lower atomization；
C, it crushes: will be sent into vacuum drier after alloy powder wet-milling crushing 64 hours, and be dried extremely at a temperature of 100 DEG C
Moisture content 0.5~1.0%, obtaining granularity is -500 mesh, and WC content is the Ti based alloy powder 100kg of 25wt%, in batches for use；
D, gained Ti based alloy powder 20.3kg, the hard alloy scraps waste material for being 6.0wt% together with Ti content wet-milling ingredient: are taken
79.7kg is sent into wet-milling in ball mill together and mixes 60 hours, obtains wet-milling mixture；
E, green compact: will be sent into vacuum oven first by wet-milling mixture obtained by D, be dried at a temperature of 100 DEG C to containing
After water rate 0.5~1.0%, the rubber solutions that concentration is 11.5wt% are added, are pressed into collar blank after mixing；
F, it is sintered: the collar blank being pressed into being sent into vacuum sintering furnace and is sintered 8 hours at a temperature of 1450 DEG C, with
Diameter is obtained after furnace is coolingThick 75mm, Ti content is 20wt% hard alloy roll ring product.
Through detecting: WC grain degree is 1.6 μm, bending strength 2500N/mm2, hardness HRA84.7.
Claims (1)
1. a kind of high titanium of high-quality and large scale class (including sheet) hard metal article processing technology, this method comprises:
A, accessory Ti based alloy mixture: titanium-base alloy waste material is sent into ball mill, according to WC's in powder and Ti or Ti+Ni
Content is added Ti powder and composition is made into containing 16~30wt% of tungsten carbide, and surplus is the powder of Ti or Ti+Ni, wet-milling mixing 16~48
After hour, drying device drying is sent into moisture content 0.5~1.0%, obtains Ti based alloy mixed powder；
B, powder by atomization: above-mentioned mixed powder is placed in melting furnace, at 1300~1400 DEG C of temperature and inert gas shielding
It is sent into after being melted to molten state in atomizer flour mill and the powder that granularity is -60~-160 mesh is made；
C, it crushes: will be sent by powder obtained by B wet-milling 48~72 hours in ball mill after being -300~-600 mesh to granularity, then will
Wet-milling mixture is sent into drying device and is dried to moisture content 0.5~1.0%, and Ti based alloy powder is obtained；
D, wet-milling ingredient: titanium-base alloy waste material is sent into ball mill, according to the WC and Ti or Ti+Ni content in powder, and is pressed
The requirement that Ti or Ti+Ni content is 10~28wt% in final product is added through Ti based alloy powder made from C, and wet-milling mixing 24~
72 hours, obtain wet-milling mixture；
E, it green compact: by above-mentioned mixture drying, mixes glue after mixing, is pressed into product blank；
F, it is sintered: by sintering 6~12 is small at a temperature of vacuum or hydrogen shield and 1360~1500 DEG C in green compact feeding sintering furnace
When, furnace cooling is up to purpose product.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711160985.4A CN109807334A (en) | 2017-11-20 | 2017-11-20 | The high titanium of high-quality and large scale class (including sheet) hard metal article processing technology |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711160985.4A CN109807334A (en) | 2017-11-20 | 2017-11-20 | The high titanium of high-quality and large scale class (including sheet) hard metal article processing technology |
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| Publication Number | Publication Date |
|---|---|
| CN109807334A true CN109807334A (en) | 2019-05-28 |
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|---|---|---|---|
| CN201711160985.4A Pending CN109807334A (en) | 2017-11-20 | 2017-11-20 | The high titanium of high-quality and large scale class (including sheet) hard metal article processing technology |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109807334A (en) |
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- 2017-11-20 CN CN201711160985.4A patent/CN109807334A/en active Pending
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Application publication date: 20190528 |