CN106756389B - Containing zirconium solid solution（W, Nb, Zr）C and its manufactured sintered carbide tool material - Google Patents
Containing zirconium solid solution（W, Nb, Zr）C and its manufactured sintered carbide tool material Download PDFInfo
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- C22C1/04—Making non-ferrous alloys by powder metallurgy
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Abstract
The present invention is containing zirconium solid solution（W, Nb, Zr）C and its manufactured sintered carbide tool material, the requirement of solid solution particle mean size are 0.8~3 micron.Containing zirconium solid solution（W, Nb, Zr）Sintered carbide tool material made of C, Binder Phase Co content 6wt.% -12wt%, containing zirconium solid solution（W, Nb, Zr）C content is 6wt%-20wt%, and remaining is WC, and WC average grain diameter is 0.8-2.0 μm in sintered carbide tool material, solid solution（W, Nb, Zr）C average grain diameters are 1-1.5 times of WC average grain diameters, and the maximum percentage by weight of ZrC content in sintered carbide tool material is 5%.Sintered carbide tool material containing zirconium of the invention solves the problems, such as that the cost of Hardmetal materials is high without expensive tantalum element.There is good anti-wear performance in metal cutting process field.
Description
Technical field：
The present invention is relevant with containing zirconium solid solution and its manufactured sintered carbide tool material.
Background technology：
In order to improve the cutting ability that hard closes cutter material, it is red to improve the high temperature of hard alloy that people are commonly incorporated into TaC
Hardness, to expand the application of hard alloy cutter.With soaring for TaC prices, researcher is all new in searching
Without Ta or few Ta sintered carbide tool materials, to reduce the cost of Hardmetal materials, there can be wider application prospect,
This research is significant to wideling popularize hard alloy cutter.
The content of the invention：
It is an object of the invention to provide a kind of cost it is low, there is good solid solubility to contain zirconium solid solution.
Another object of the present invention is to provide, a kind of cost is low, has the hard alloy cutter material of superior cutting ability
Material.
What the present invention was realized in：Containing zirconium solid solution（W, Nb, Zr）C, the requirement of particle mean size containing zirconium solid solution are 0.8
~3 microns.
Containing zirconium solid solution（W, Nb, Zr）WC in C：NbC：ZrC mass ratio is:55—60：20—25：15-20, preferably
59.64:23.23:17.14。
Containing zirconium solid solution（W, Nb, Zr）C preparation process is as follows：
（1）According to the composition and granularity requirements of solid solution, the material powder of corresponding granularity is weighed respectively, by WC, ZrO2、
Nb2O5By 50~60：20~30：15~20 weight ratio is prepared, and is used as reducing agent using carbon black.
（2）Raw material is uniformly mixed by rolling ball milling, using alcohol as ball-milling medium, ratio of grinding media to material 4：1, batch mixing
Time is 10 hours.
（3）Material base will be pressed into 0.6MPa pressure through drying, the compound powder wiped after sieving；
（4）By the material base being pressed at a temperature of 1700-1800 DEG C reduction reaction, most finally 2000 DEG C~2200 DEG C bars
Solid-solution powder is prepared in vacuum solid solution 3-5 hours under part, reaction.
Containing zirconium solid solution（W, Nb, Zr）Sintered carbide tool material made of C, Binder Phase Co content 6wt.% -12wt.%,
Containing zirconium solid solution（W, Nb, Zr）C content is 6wt.% -20wt.%, and remaining is WC, WC average grain in sintered carbide tool material
Footpath is 0.8-2.0 μm, solid solution（W, Nb, Zr）C average grain diameters are 1-1.5 times of WC average grain diameters, and ZrC content is closed in hard
Maximum percentage by weight in golden cutter material is 5%.Maximum of the ZrC content in sintered carbide tool material in the present invention
Percentage by weight is 5%, this numerical value more than 5%, and the fragility of alloy cutter material increases, and the sintering character of alloy material becomes
Difference.
Described contains zirconium solid solution（W, Nb, Zr）Sintered carbide tool material made of C, its preparation method are as follows：
According to formula, by average grain diameter be respectively 1-2 μm WC, 1.5-2.5 μm contain zirconium solid solution（W, Zr, Nb）C、
And 1 μm of Co, mix in proportion, using hexane as wet grinding media, per kilogram powder adds 350 milliliters, ratio of grinding media to material 4:1, ball milling
After time 64h, Ball-milling Time 64h, then join wax mixing 2h, blade blank is pressed into after drying and granulating, in temperature 1450 DEG C -1475
DEG C, 4-6MPa low pressure sinterings 1.5h.
The present invention is respectively using WC as raw material, ZrO2As Zr sources, Nb2O5As Nb sources, then it is equipped with a certain amount of carbon powder
End, reduction and carbonization-solid solution reaction is carried out under vacuo, so as to which required solid-solution powder be made.As obtained by prepared by this method
Solid-solution powder there is good solid solubility, be phase structure by XRD analysis, while the purity of product is high, oxygen content is low,
Composition is controllable.Cost only has tradition（W/Ta）The 43% of C solid solution.
The present invention substitutes the TaC of costliness as cutter raw material, the cutting ability of cutter with relatively inexpensive ZrC and NbC
Quite.Containing zirconium solid solution（W0.44Nb0.34Zr0.24）C can substitute TaC solid solution and be applied to welded tube deburring cutter completely
Matrix material in, blade cost can be made substantially to reduce, the cost performance of cutter is higher.
Brief description of the drawings：
Fig. 1 is the blade schematic diagrames of 107jd1-3.
Fig. 2 is Fig. 1 sectional view.
Fig. 3 is the blade schematic diagrames of WG -3.
Fig. 4 is Fig. 3 sectional view.
Fig. 5 is the use schematic diagram of 107jd1-3 and the blades of WG-3
Embodiment：
Embodiment 1：
Containing zirconium solid solution（W, Nb, Zr）C preparation method, its step are：
（1）According to the composition and granularity requirements of solid solution, the material powder of corresponding granularity is weighed respectively, by WC, ZrO2、
Nb2O5By 50~60：20~30：15~20 weight ratio is prepared, and is used as reducing agent using carbon black.
（2）Pretreated mixture slurry is transferred in vacuum drying chamber, under -0.04Mpa pressure, at 75 DEG C
Compound is taken out after drying and wipes sieve, obtains the compound powder that particle diameter is 0.5-1mm；
（3）Compound powder is pressed into the material base of definite shape with 0.6MPa pressure；
（4）The material base suppressed is transferred in vacuum reactor, first reduction reaction, most finally 2100 at a temperature of 1750 DEG C
Solid-solution powder is prepared in vacuum solid solution 4 hours under the conditions of DEG C, reaction.
Embodiment 2：
Granularity is used as 2 μm of WC powders, 1.0 μm of ZrO2Powder, 1.0 μm of Nb2O5Powder is as raw material.Its quality proportioning
For WC：Nb2O5：ZrO2=54.44:26.87:18.69, and add 13.95wt% or so hydrocarbon black powder.
By the method for embodiment 1, the slurry mixed is dried at vacuum -0.04Mpa, 75 DEG C, material drop to be mixed
Taken out after to room temperature, be 0.5-1.0mm particle powders by wiping sieve series to obtain granularity, then the re-compacted material base into definite shape,
Material base is placed in vacuum tank, the vacuum solid solution 4 at a temperature of 2000 DEG C again after first vacuum reduction is reacted 3 hours at 1700 DEG C
Hour, finally it is organized as（W0.44Nb0.32Zr0.24）C solid-solution powder.
Solid-solution powder chemical composition：It is shown in Table 1.
Table 1：Solid solution chemical analysis
Obtained powdered ingredients are consistent with design load substantially as can be seen from the above table, and oxygen content is very low≤and 0.1%, powder tool
There is higher purity（99.5%）.
Embodiment 3：
By solid solution made from embodiment 2（W0.44Nb0.32Zr0.24）C, according to formula：Percentage by weight, Co contents
12wt.%, solid solution（W0.44Nb0.32Zr0.24）C content 18wt.%, remaining is WC, and ZrC content is in sintered carbide tool material
In maximum percentage by weight be 5%.By average grain diameter be respectively 1-2 μm WC, 1.5-2.5 μm of solid solution
（W0.44Nb0.32Zr0.24）C, and 1 μm of Co, mixed by above-mentioned formula, using hexane as wet grinding media, per kilogram powder adds 350
Milliliter, ratio of grinding media to material 4:After 1, Ball-milling Time 64h, Ball-milling Time 64h, then join wax mixing 2h, blade hair is pressed into after drying and granulating
Base, in 1450 DEG C of temperature, 4-6MPa low pressure sinterings 1.5h obtains sintered carbide tool material.
Experimental example 1：
The sintered carbide tool material made from embodiment 3 substitutes tradition（W/Ta）Carbide cutter tool made from C solid solution
Tool material makees welded tube deburring cutter, and specific test situation is as follows：
（1）Solid solution composition contrasts：
Made from embodiment 3（W0.44Nb0.32Zr0.24）C unit prices：860 yuan/kilogram
Tradition（W/Ta）C solid solution：WC：TaC=50：50 unit prices：2000 yuan/kilogram
2）Identical addition hart metal product performance comparison
Above two solid solution is prepared to two kinds of sintered carbide tool materials under identical process conditions, chemistry into
It is respectively：
1. the sintered carbide tool material of embodiment 3：WC（It is remaining）, 18%（W0.44Nb0.32Zr0.24）C, 12%Co,
2. tradition（W/Ta）Sintered carbide tool material is made in C solid solution：WC（It is remaining）, 18%（WC：TaC=50：50）, 12
%Co。
Production method：
According to formula, by average grain diameter be respectively 1-2 μm WC, 1.5-2.5 μm（W, Zr, Nb）C or tradition（W/
Ta）C solid solution and 1 μm of Co, are mixed in proportion, and using hexane as wet grinding media, per kilogram powder adds 350 milliliters, ratio of grinding media to material
For 4:After 1, Ball-milling Time 64h, Ball-milling Time 64h, then join wax mixing 2h, blade blank is pressed into after drying and granulating, in temperature
1450 DEG C, different solid solution cutter materials 1,2 are respectively prepared in 4-6MPa low pressure sinterings 1.5h.
Its physical and mechanical property such as table 2 below.
Table 2 adds different solid solution cutter material performances：
3）Two kinds of cutter materials are fabricated to inside and outside welded tube deburring blade 107jd1-3 and WG-3 (see attached respectively
Figure), then go scene cutting checking, its result such as table 3 below to factory after the processing of identical CVD coating process again.
The Tool in Cutting result of the test of table 3
As can be seen from the above table, the cutting ability of cutter is suitable.Containing zirconium solid solution（W0.44Nb0.34Zr0.24）C completely may be used
It is applied to substituting solid solution containing Ta in the matrix material of welded tube deburring cutter, blade cost can be made substantially to reduce, knife
The cost performance of tool is higher.
Claims (4)
1. contain zirconium solid solution（W, Nb, Zr）C, it is characterised in that the requirement of solid solution particle mean size is 0.8~3 micron, solid solution（W,
Nb, Zr）C preparation process is as follows：
（1）According to the composition and granularity requirements of solid solution, the material powder of corresponding granularity is weighed respectively, by WC, ZrO2、Nb2O5Press
50~60：20~30：15~20 weight ratio is prepared, and using carbon black as reducing agent,
（2）Uniformly mixing 10 hours, ratio of grinding media to material 4 are carried out to raw material by rolling ball milling：1,
（3）Material base will be pressed into 0.6MPa pressure through drying, the compound powder wiped after sieving,
（4）By the material base being pressed at a temperature of 1700-1800 DEG C reduction reaction, under the conditions of most finally 2000 DEG C~2200 DEG C
Solid-solution powder is prepared in vacuum solid solution 3-5 hours, reaction.
2. according to claim 1 contain zirconium solid solution（W, Nb, Zr）C, it is characterised in that（W, Nb, Zr）WC in C solid solution：
NbC：ZrC mass ratio is:59.64:23.23:17.14.
3. according to claim 1 contain zirconium solid solution（W, Nb, Zr）Sintered carbide tool material made of C, its feature exist
In Binder Phase Co content 6wt.% -12wt.%, containing zirconium solid solution（W, Nb, Zr）C content is 6wt.% -20wt.%, and remaining is WC,
WC average grain diameter is 0.8-2.0 μm in sintered carbide tool material, containing zirconium solid solution（W, Nb, Zr）C average grain diameters are put down for WC
Equal 1-1.5 times of particle diameter, the maximum percentage by weight of ZrC content in sintered carbide tool material is 5%.
4. described according to claim 3 contain zirconium solid solution（W, Nb, Zr）Sintered carbide tool material made of C, it is special
Sign is that its preparation method is as follows：
According to formula, by average grain diameter be respectively 1-2 μm WC, 1.5-2.5 μm contain zirconium solid solution（W, Zr, Nb）C, and
1 μm of Co, is mixed in proportion, and using hexane as wet grinding media, per kilogram powder adds 350 milliliters, ratio of grinding media to material 4:1, Ball-milling Time
After 64h, Ball-milling Time 64h, then join wax mixing 2h, blade blank is pressed into after drying and granulating, in 1450 DEG C -1475 DEG C of temperature,
4-6MPa low pressure sinterings 1.5h.
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