CN108004451B - A kind of soaking plate hard alloy and its soaking plate - Google Patents
A kind of soaking plate hard alloy and its soaking plate Download PDFInfo
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- CN108004451B CN108004451B CN201711271110.1A CN201711271110A CN108004451B CN 108004451 B CN108004451 B CN 108004451B CN 201711271110 A CN201711271110 A CN 201711271110A CN 108004451 B CN108004451 B CN 108004451B
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C29/00—Alloys based on carbides, oxides, nitrides, borides, or silicides, e.g. cermets, or other metal compounds, e.g. oxynitrides, sulfides
- C22C29/02—Alloys based on carbides, oxides, nitrides, borides, or silicides, e.g. cermets, or other metal compounds, e.g. oxynitrides, sulfides based on carbides or carbonitrides
- C22C29/06—Alloys based on carbides, oxides, nitrides, borides, or silicides, e.g. cermets, or other metal compounds, e.g. oxynitrides, sulfides based on carbides or carbonitrides based on carbides, but not containing other metal compounds
- C22C29/08—Alloys based on carbides, oxides, nitrides, borides, or silicides, e.g. cermets, or other metal compounds, e.g. oxynitrides, sulfides based on carbides or carbonitrides based on carbides, but not containing other metal compounds based on tungsten carbide
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- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B23/00—Re-forming shaped glass
- C03B23/02—Re-forming glass sheets
- C03B23/023—Re-forming glass sheets by bending
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C1/00—Making non-ferrous alloys
- C22C1/04—Making non-ferrous alloys by powder metallurgy
- C22C1/05—Mixtures of metal powder with non-metallic powder
- C22C1/051—Making hard metals based on borides, carbides, nitrides, oxides or silicides; Preparation of the powder mixture used as the starting material therefor
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C29/00—Alloys based on carbides, oxides, nitrides, borides, or silicides, e.g. cermets, or other metal compounds, e.g. oxynitrides, sulfides
- C22C29/02—Alloys based on carbides, oxides, nitrides, borides, or silicides, e.g. cermets, or other metal compounds, e.g. oxynitrides, sulfides based on carbides or carbonitrides
- C22C29/06—Alloys based on carbides, oxides, nitrides, borides, or silicides, e.g. cermets, or other metal compounds, e.g. oxynitrides, sulfides based on carbides or carbonitrides based on carbides, but not containing other metal compounds
- C22C29/067—Alloys based on carbides, oxides, nitrides, borides, or silicides, e.g. cermets, or other metal compounds, e.g. oxynitrides, sulfides based on carbides or carbonitrides based on carbides, but not containing other metal compounds comprising a particular metallic binder
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- 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
- B22F2998/00—Supplementary information concerning processes or compositions relating to powder metallurgy
- B22F2998/10—Processes characterised by the sequence of their steps
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- 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
- B22F2999/00—Aspects linked to processes or compositions used in powder metallurgy
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Abstract
The present invention discloses a kind of soaking plate hard alloy, which is characterized in that by adding Cr in super crude crystal WC -14Ni alloy3C2It is prepared with Cu, wherein weigh each raw material, the Cr by following mass percent3C2It is 0.5-3.5Wt% for 1.0-2.8Wt%, the Cu, the super crude crystal WC -14Ni alloy is surplus.Using super crude crystal WC, by deploying Cr3C2It is adjusted with the component ratio of Cu, so that the alloy surface of soaking plate forms one layer of fine and close oxide film protection layer under worst hot case, makes this soaking plate that there is fabulous high temperature oxidation resistance, the thermal conductivity and high temperature hardness of soaking plate can be improved.Hard alloy preparation of the invention is simple, can effectively improve the performance of soaking plate, has filled up the blank in the domestic field, and the soaking plate for solving China uses the status of the product by foreign country, has huge economic benefit.
Description
Technical field
The present invention relates to hard alloy fields, more particularly, to a kind of soaking plate hard alloy and its soaking plate.
Background technique
In recent years, with the continuous extension of hard alloy application field, hard alloy material is towards super thick and two ultra-fine
Direction is developed, and super thick hard alloy is widely used to mining drilling tool, roll and stamping die field.
2D, 2.5D glass phase ratio that 3D bend glass is used with smart phone before, the molding of 3D bend glass increase one
A hot bending process, the stability of the molding hot bending equipment of 3D bend glass, directly influences the properties of product of 3D glass.Hot-bending machine
When carrying out the compacting of 3D bend glass, need by preheating glass, constant temperature compacting and cooling process.In this process, glass
Glass is the progress heat distortion in graphite jig, if glass uneven heating, temperature distortion elongation percentage everywhere is different, is held
Easily cause glass flatness that cannot reach design requirement or fragmentation.
Soaking plate enables heat uniformly to conduct a graphite jig using the high heat conductance of itself material, is glass energy
It is suppressed in the uniform graphite jig of temperature, obtains qualified 3D bend glass.
Soaking plate is other than needing good thermal conductivity, under hot operation state, although there is inert gas shielding,
Hot-bending machine is worked continuously, and is entered a small amount of oxygen in operation, is caused soaking plate premature oxidation and fail.In addition soaking plate
High temperature hardness also to guaranteeing that the flatness of soaking plate is advantageous under worst hot case, enables graphite jig in constant level
It is effectively suppressed under the compacting plane of angle.So soaking plate requires good resistance to high temperature oxidation ingredient design, high temperature hardness
And thermal conductivity.
It is hot-forming that soaking plate is mainly used in bend glass, including mobile phone faceplate glass, lens element etc., 3D glass heat
Bender is that thermally conductive and compacting support material is served as using stainless steel plate at the beginning of designing, and is suppressed by upper and lower two pieces of stainless steel plates special
Graphite jig, complete the curved surface forming of plate glass in graphite jig, but stainless steel plate deposits deflection at high operating temperatures
Greatly, conduction inequality is even, it is difficult to which the technique requirement for meeting bend glass compacting is adjusted by hot-bending machine design scheme, by not
It becomes rusty and adds one piece of soaking plate between steel plate and graphite jig, serve as the role of uniform heat conduction and compacting support, at present soaking plate
Material includes metal material and nonmetallic materials, for service condition, all there is thermal conductivity, high temperature oxidation resistance, height substantially
The problem of this four individual character of warm hardness, elevated temperature strength can meet simultaneously, based on improving necessary four performances of soaking plate, China
The equal import foreign country of soaking plate product, the soaking plate produced at home is extremely difficult to requirement.
Summary of the invention
The technical problem to be solved by the present invention is in view of the shortcomings of the prior art, providing a kind of soaking plate hard alloy.It adopts
With super crude crystal WC, pass through allotment Cr3C2It is adjusted with the component ratio of Cu, so that under worst hot case, the alloy surface shape of soaking plate
At one layer of fine and close oxide film protection layer, makes this soaking plate that there is fabulous high temperature oxidation resistance, the heat of soaking plate can be improved
Conductance and high temperature hardness.Meanwhile the present invention also provides the preparation process of the hard alloy and using the soaking plate of the hard alloy
Preparation method.Make the soaking plate produced while having that thermal conductivity is good, high temperature oxidation resistance is good, high temperature hardness is high, high temperature
The high feature of intensity is able to satisfy production needs.
The purpose of the present invention is achieved by the following technical programs:
The present invention discloses soaking plate hard alloy, which is characterized in that by adding Cr in super crude crystal WC -14Ni alloy3C2With
Cu is prepared, wherein weighs each raw material, the Cr by following mass percent3C2It is 0.5- for 1.0-2.8Wt%, the Cu
3.5Wt%, the super crude crystal WC -14Ni alloy are surplus.
Further, the super crude crystal WC -14Ni alloy by super crude crystal WC -14Ni alloy by grinding state Fisher particle size >=
The super crude crystal WC of 6um is prepared.
Super crude crystal WC -14Ni alloy selection grinding high-quality super the crude crystal WC of state Fisher particle size >=6um of the invention is made, and surpasses
The crude crystal WC genetic prerequisite good with high temperature hardness height and thermal conductivity.
The present invention is by experiment and calculates, and has obtained the hard alloy for being preferably suitable for soaking plate: WC-12Ni-2Cu-
1.4Cr3C2。
The present invention discloses a kind of preparation method of soaking plate hard alloy, comprising the following steps:
S1. Cr will be added in super crude crystal WC -14Ni alloy3C2, first time wet-milling is carried out, ratio of grinding media to material 3:1 is wet for the first time
Time consuming is 30-36h, and the revolving speed of the ball mill of first time wet-milling is 28-32r/min, obtains mixed material one；
S2. Cu will be added in mixed material one described in step S1, by second of wet-milling, ratio of grinding media to material 3:1, by adjusting
Drum's speed of rotation, carries out second of wet-milling, and second Ball-milling Time is 30-36h, and in preceding 10-12h Ball-milling Time, ball mill turns
Speed is 38-42r/min, in rear 20-24h, drum's speed of rotation 16-24r/min；Obtain mixed material two；
S3. the mixed material two above-mentioned mixing and ball milling completed utilizes isostatic pressing, so that density is green compact everywhere
7.8-8.2g/cm3；S4. the green compact of step S3 is subjected to vacuum-sintering: is sintered under 10-15Pa vacuum state, sintering temperature is
1450-1470 DEG C, final temperature soaking time is 1-2h, is cooled to 100 DEG C, obtains soaking plate hard alloy.
It is further preferred that the first time wet-milling time is 32h, the revolving speed of the ball mill of first time wet-milling is 30r/
min。
It is further preferred that second of Ball-milling Time is 32h, and in preceding 10h Ball-milling Time, drum's speed of rotation 40r/
In min, rear 20h, drum's speed of rotation 20r/min.
Further, density is 8.0g/cm to the green compact everywhere3。
It is further preferred that sintering temperature described in step S4 is 1450 DEG C, final temperature soaking time is 2h.
The present invention changes ball mill grinding efficiency by segmentation frequency modulation technology, obtains the mixing that structural constituent is evenly distributed
Material: by adjusting drum's speed of rotation, changing grinding efficiency, obtains in the case where being uniformly distributed alloy structure ingredient best
Super coarse-grain grain structure structure.
The present invention obtains soaking plate green compact consistent in density everywhere by isostatic cool pressing, eliminates alloy in the subsequent sintering process
Internal stress.
Another object of the present invention is to provide a kind of methods that above-mentioned soaking plate prepares soaking plate with hard alloy, including
Following steps:
Y1. it by the way that the soaking plate baked to be placed in heat-treatment furnace with hard alloy, under first vacuum state, rises
Temperature keeps the temperature 60-100min to 1250-1270 DEG C；Y2. high pure nitrogen, pressure 2-3bar, by the fast quickly cooling of soaking plate are then passed to
But to 750-780 DEG C, 30-60min is kept the temperature, then cools to 450-480 DEG C with the furnace, keeps the temperature 180-240min, it is then cold with furnace
But, soaking plate is obtained.
Soaking plate of the invention for bend glass it is hot-forming in.
Compared with prior art, beneficial effects of the present invention:
Soaking plate of the invention is with hard alloy with thermal conductivity is good, high temperature oxidation resistance is good, high temperature hardness is high, high temperature
The high feature of intensity.
WC raw material of the present invention use high-quality super crude crystal WC, present component design aspect, it is determined that are based on alloy antioxygen
The optimal Ni and Cr of the property changed aspect3C2Proportion introduces Cu based on the thermally conductive aspect of alloy in bonding phase structure, and is based on alloy
Ni and Cu optimum proportioning has been determined in terms of hardness and strength character, isostatic pressing and Re Chu are implemented in alloy preparation technology
Science and engineering skill effectively improves alloy property, and especially elimination alloy internal stress and Reinforced Cu are suitable for the solution strengthening of Ni
The hard alloy of soaking plate.
Hard alloy preparation of the invention is simple, can effectively improve the performance of soaking plate, has filled up the sky in the domestic field
White, the soaking plate for solving China uses the status of the product by foreign country, has huge economic benefit.
Detailed description of the invention
Super coarse crystal WC powder SEM picture Fig. 1 of the invention.
WC-12Ni-2Cu-1.4Cr Fig. 2 of the invention3C2The metallograph of hard alloy.
Specific embodiment
Present invention be described in more detail in the following with reference to the drawings and specific embodiments.Unless stated otherwise, the present invention is implemented
The various raw materials that example uses can be obtained by regular market purchase, or be prepared according to the conventional method of this field, used to set
Standby is experiment commonly used equipment.Unless otherwise defined or described herein, all professional and scientific terms used herein and this field
Meaning known to person skilled in the art is identical.
The present invention selects the high-quality super crude crystal WC of grinding state Fisher particle size >=6um to prepare super crude crystal WC -14Ni alloy, surpasses
The parameter of crude crystal WC is shown in Table 1, this super crude crystal WC has the genetic prerequisite that high temperature hardness is high, thermal conductivity is good.
Table 1
| Fisher particle size (μm) | Grind state Fei Shi (μm) | Total carbon (%) |
| 15 | 6 | 6.13 |
The present invention passes through Cr3C2, Cu sets the solution strengthening mechanism of Ni in WC-14Ni alloy and the mechanism of Cu high heat conductance
Count soaking plate alloying component composition.
Embodiment 1
(1) soaking plate hard alloy
The soaking plate hard alloy of the present embodiment, by adding Cr in super crude crystal WC -14Ni alloy3C2It is prepared with Cu,
Wherein, each raw material is weighed by following mass percent, specific ingredient and content are shown in Table 2.
(2) preparation method of soaking plate hard alloy
The preparation method of the soaking plate hard alloy of the present embodiment, comprising the following steps:
S1. Cr will be added in super crude crystal WC -14Ni alloy3C2, first time wet-milling is carried out, ratio of grinding media to material 3:1 is wet for the first time
Time consuming is 30h, and the revolving speed of the ball mill of first time wet-milling is 28r/min, obtains mixed material one；
S2. Cu will be added in mixed material one described in step S1, by second of wet-milling, ratio of grinding media to material 3:1, by adjusting
Drum's speed of rotation, carries out second of wet-milling, and second Ball-milling Time is 30h, ratio of grinding media to material 3:1, in preceding 10h Ball-milling Time, ball milling
Machine revolving speed is 38r/min, in rear 20h, drum's speed of rotation 16r/min；Obtain mixed material two；
S3. the mixed material two above-mentioned mixing and ball milling completed utilizes isostatic pressing, so that density is green compact everywhere
7.8g/cm3；
S4. the green compact of step S3 being subjected to vacuum-sintering: is sintered under 10-15Pa vacuum state, sintering temperature is 1450 DEG C,
Final temperature soaking time is 1h, is cooled to 100 DEG C, obtains soaking plate hard alloy.
(3) method that soaking plate prepares soaking plate with hard alloy
The method that the soaking plate of the present embodiment prepares soaking plate with hard alloy, comprising the following steps:
Y1. it by the way that the soaking plate baked to be placed in heat-treatment furnace with hard alloy, under first vacuum state, rises
Temperature keeps the temperature 60min to 1250 DEG C；
Y2. high pure nitrogen is then passed to, soaking plate is quickly cooled to 750 DEG C, keeps the temperature 30min, then by pressure 2bar
It cools to 450 DEG C with the furnace, keeps the temperature 180min, then furnace cooling obtains soaking plate.
Embodiment 2
(1) soaking plate hard alloy
The soaking plate hard alloy of the present embodiment, by adding Cr in super crude crystal WC -14Ni alloy3C2It is prepared with Cu,
Wherein, each raw material is weighed by following mass percent, specific ingredient and content are shown in Table 2.
(2) preparation method of soaking plate hard alloy
The preparation method of the soaking plate hard alloy of the present embodiment, comprising the following steps:
S1. Cr will be added in super crude crystal WC -14Ni alloy3C2, first time wet-milling is carried out, ratio of grinding media to material 3:1 is wet for the first time
Time consuming is 36h, and the revolving speed of the ball mill of first time wet-milling is 32r/min, obtains mixed material one；
S2. Cu will be added in mixed material one described in step S1, by second of wet-milling, ratio of grinding media to material 3:1, by adjusting
Drum's speed of rotation, carries out second of wet-milling, and second Ball-milling Time is 36h, ratio of grinding media to material 3:1, in preceding 12h Ball-milling Time, ball milling
Machine revolving speed be 42r/min, after for 24 hours in, drum's speed of rotation 24r/min；Obtain mixed material two；
S3. the mixed material two above-mentioned mixing and ball milling completed utilizes isostatic pressing, so that density is green compact everywhere
8.2g/cm3；
S4. the green compact of step S3 is subjected to vacuum-sintering: is sintered under 10-15 vacuum state, sintering temperature is 1470 DEG C, eventually
Warm soaking time is 2h, is cooled to 100 DEG C, obtains soaking plate hard alloy.
(3) method that soaking plate prepares soaking plate with hard alloy
The method that the soaking plate of the present embodiment prepares soaking plate with hard alloy, comprising the following steps:
Y1. it by the way that the soaking plate baked to be placed in heat-treatment furnace with hard alloy, under first vacuum state, rises
Temperature keeps the temperature 100min to 1270 DEG C；
Y2. high pure nitrogen is then passed to, soaking plate is quickly cooled to 780 DEG C, keeps the temperature 60min, then by pressure 3bar
It cools to 480 DEG C with the furnace, keeps the temperature 240min, then furnace cooling obtains soaking plate.
Embodiment 3
(1) soaking plate hard alloy
The soaking plate hard alloy of the present embodiment, by adding Cr in super crude crystal WC -14Ni alloy3C2It is prepared with Cu,
Wherein, each raw material is weighed by following mass percent, specific ingredient and content are shown in Table 2.
(2) preparation method of soaking plate hard alloy
The preparation method of the soaking plate hard alloy of the present embodiment, it is same as Example 1, the difference is that, step
Rapid S1. will add Cr in super crude crystal WC -14Ni alloy3C2, carry out first time wet-milling, ratio of grinding media to material 3:1, wet-milling time first time
For 32h, the revolving speed of the ball mill of first time wet-milling is 30r/min；Remaining step is same as Example 1.
(3) method that soaking plate prepares soaking plate with hard alloy
The method that the soaking plate of the present embodiment prepares soaking plate with hard alloy, comprising the following steps:
Y1. it by the way that the soaking plate baked to be placed in heat-treatment furnace with hard alloy, under first vacuum state, rises
Temperature keeps the temperature 80min to 1270 DEG C；
Y2. high pure nitrogen is then passed to, soaking plate is quickly cooled to 760 DEG C, keeps the temperature 40min, so by pressure 2.5bar
After cool to 480 DEG C with the furnace, keep the temperature 240min, then furnace cooling obtains soaking plate.
Embodiment 4
(1) soaking plate hard alloy
The soaking plate hard alloy of the present embodiment, by adding Cr in super crude crystal WC -14Ni alloy3C2It is prepared with Cu,
Wherein, each raw material is weighed by following mass percent, specific ingredient and content are shown in Table 2.
(2) preparation method of soaking plate hard alloy
The preparation method of the soaking plate hard alloy of the present embodiment, it is same as Example 1, the difference is that, step
Rapid second of Ball-milling Time of S2. is 32h, and ratio of grinding media to material 3:1, preceding 10h drum's speed of rotation is 40r/min, and rear 20h drum's speed of rotation is
22r/min；Remaining step is same as Example 1.
(3) method that soaking plate prepares soaking plate with hard alloy
The soaking plate of the present embodiment is same as Example 1 with the method that hard alloy prepares soaking plate.
Embodiment 5
(1) soaking plate hard alloy
The soaking plate hard alloy of the present embodiment, by adding Cr in super crude crystal WC -14Ni alloy3C2It is prepared with Cu,
Wherein, each raw material is weighed by following mass percent, specific ingredient and content are shown in Table 2.
(2) preparation method of soaking plate hard alloy
The preparation method of the soaking plate hard alloy of the present embodiment, it is same as Example 1, the difference is that, S3
Green compact everywhere density be 8.0g/cm3.Remaining step is same as Example 1.
(3) method that soaking plate prepares soaking plate with hard alloy
The soaking plate of the present embodiment is substantially same as Example 1 with the method that hard alloy prepares soaking plate.Its difference
It is in soaking plate being quickly cooled to 780 DEG C, keeps the temperature 50min, the uniform embodiment 1 of remaining method is identical in step Y2.
Embodiment 6
(1) soaking plate hard alloy
The soaking plate hard alloy of the present embodiment, by adding Cr in super crude crystal WC -14Ni alloy3C2It is prepared with Cu,
Wherein, each raw material is weighed by following mass percent, specific ingredient and content are shown in Table 2.
(2) preparation method of soaking plate hard alloy
The preparation method of the soaking plate of the hard alloy of the present embodiment, it is same as Example 1, the difference is that, S4.
Sintering temperature is 1460 DEG C, and final temperature soaking time is 2h.Remaining step is same as Example 1.
(3) method that soaking plate prepares soaking plate with hard alloy
The soaking plate of the present embodiment is substantially same as Example 1 with the method that hard alloy prepares soaking plate.Its difference
It is in soaking plate being quickly cooled to 780 DEG C, keeps the temperature 40min, cools to 460 DEG C with the furnace, keeps the temperature 200min in step Y2
The uniform embodiment 1 of remaining method is identical.
Embodiment 7
(1) the soaking plate hard alloy of soaking plate hard alloy the present embodiment, by adding in super crude crystal WC -14Ni alloy
Add Cr3C2It is prepared with Cu, wherein weigh each raw material by following mass percent, specific ingredient and content are shown in Table 2.
(2) preparation method of soaking plate hard alloy
The preparation method of the soaking plate of the hard alloy of the present embodiment, it is same as Example 1.
(3) method that soaking plate prepares soaking plate with hard alloy
The soaking plate of the present embodiment is substantially same as Example 1 with the method that hard alloy prepares soaking plate.Its difference
Be in, in step Y1, by the way that the soaking plate baked is placed in heat-treatment furnace with hard alloy, first vacuum state
Under, 1260 DEG C are warming up to, 80min is kept the temperature；The uniform embodiment 1 of remaining method is identical.
Table 2
The soaking plate of embodiment 1- embodiment 7 is different by adding into super crude crystal WC -14Ni alloy with hard alloy
Measure Cr3C2, carry out the comparison of 750 DEG C of high-temperature oxydation weight increment tests, the alloy for being 14wt% for Ni content, oxidation weight gain with
Cr3C2The increase of content and reduce, but more than 1.6wt% after, oxidation weight gain is not substantially reduced.Its increasing weight of oxidation is shown in Table 3.
Table 3
| Oxidation weight gain (wt%) | |
| Embodiment 1 | 0.011 |
| Embodiment 2 | 0.009 |
| Embodiment 3 | 0.006 |
| Embodiment 4 | 0.005 |
| Embodiment 5 | 0.004 |
| Embodiment 6 | 0.005 |
| Embodiment 7 | 0.005 |
Not same amount Cu is added in passing super crude crystal WC -14Ni alloy and replaces part Ni, carries out alloy physics performance comparison,
Test result is shown in Table 4, shows that the hardness and strength of alloy have optimum matching point with the increase of Cu content, when Cu content reaches
When 2.0wt%, the hardness and bending strength of alloy reach optimal equalization value, and in addition alloy thermal conductivity is held with the increase of Cu content
It is continuous to increase.
Table 4
| Number | Bending strength (MPa) | Hardness (HRA) | Thermal conductivity W/ (m*k) |
| Embodiment 1 | 2570 | 85.2 | 34 |
| Embodiment 2 | 2810 | 85.5 | 37 |
| Embodiment 3 | 2930 | 85.8 | 41 |
| Embodiment 4 | 3090 | 86 | 43 |
| Embodiment 5 | 2980 | 86.1 | 44 |
| Embodiment 6 | 2760 | 85.9 | 46 |
| Embodiment 7 | 2610 | 85.7 | 47 |
By test, WC-12Ni-2Cu alloy has the optimum value of optimal bending strength and hardness, viscous based on 12Ni-2Cu
Tie the Cr that 1.6wt% is added on the basis of phase constituent designs and in 14Ni alloy3C2There is optimal inoxidizability, is changed according to than column
It calculates, 12Ni alloy most preferably adds the Cr of 1.4wt%3C2, addition is so soaking plate ultimate constituent design scheme is WC-12Ni-2Cu-
1.4Cr3C2。
WC-12Ni-2Cu-1.4Cr3C2By being quickly cooled to 750 DEG C, then heat preservation 60min cools to 450 DEG C with the furnace,
180min is kept the temperature, then the heat treatment process of furnace cooling, alloy rigidity are respectively increased with the mutually nonheat-treated alloy of intensity
0.2HRA and 200MPa.Specific data are shown in Table 5.
Table 5
Fig. 1 is the SEM picture for the high-quality super crude crystal WC that the present invention uses, and the knot grain of the powder is complete, even particle size distribution
Good, powder particle degree of aggregation is low, while to WC-12Ni-2Cu-1.4Cr3C2Hard alloy carries out metallographic structure observation, by Fig. 2
As it can be seen that alloy microstructure is evenly distributed, crystallite dimension is big, and adjacent degree is high between WC grain, and for hard alloy, heat is in WC crystalline substance
The conduction of velocity of grain is much larger than the speed conducted in Binder Phase, and WC grain is sturdy, adjacent degree is high is conducive to the thermally conductive of alloy, full
The foot requirement of soaking plate.
The foregoing is only a preferred embodiment of the present invention, is not intended to restrict the invention, for the skill of this field
For art personnel, the invention may be variously modified and varied.All within the spirits and principles of the present invention, made any to repair
Change, equivalent replacement, improvement etc., should be included within scope of the invention.
Claims (9)
1. a kind of preparation method of soaking plate hard alloy, which is characterized in that it is at being grouped into Cr3C2For 1.0-
2.8Wt%, Cu 0.5-3.5Wt%, super crude crystal WC -14Ni alloy are surplus；Its preparation step includes:
S1. Cr will be added in super crude crystal WC -14Ni alloy3C2, first time wet-milling is carried out, wet-milling time first time is 30-36h, the
The revolving speed of the ball mill of wet-milling is 28-32r/min, obtains mixed material one；
S2. Cu will be added in mixed material one described in step S1, is carried out by second of wet-milling by adjusting drum's speed of rotation
Second of wet-milling, second Ball-milling Time are 30-36h, in preceding 10-12h Ball-milling Time, drum's speed of rotation 38-42r/min,
Afterwards in 20-24h, drum's speed of rotation 16-24r/min；Obtain mixed material two；
S3. the mixed material two above-mentioned mixing and ball milling completed utilizes isostatic pressing, so that density is 7.8- to green compact everywhere
8.2g/cm3；
S4. the green compact of step S3 is subjected to vacuum-sintering: is sintered under 10-15Pa vacuum state, sintering temperature 1450-1470
DEG C, final temperature soaking time is 1-2h, is cooled to 100 DEG C, obtains soaking plate hard alloy.
2. the preparation method of soaking plate hard alloy according to claim 1, which is characterized in that the super crude crystal WC-
14Ni alloy is prepared by the super crude crystal WC of grinding state Fisher particle size >=6 μm.
3. the preparation method of soaking plate hard alloy according to claim 1, which is characterized in that the hard alloy composition
Ingredient is WC-12Ni-2Cu-1.4Cr3C2。
4. preparing the preparation method of soaking plate hard alloy according to claim 1, which is characterized in that the first time is wet
Time consuming is 32h, and the revolving speed of the ball mill of first time wet-milling is 30r/min.
5. preparing the preparation method of soaking plate hard alloy according to claim 1, which is characterized in that second of ball
Consuming time is 32h, in preceding 10h Ball-milling Time, in drum's speed of rotation 40r/min, rear 20h, and drum's speed of rotation 20r/min.
6. preparing the preparation method of soaking plate hard alloy according to claim 1, which is characterized in that the green compact is everywhere
Density is 8.0g/cm3。
7. preparing the preparation method of soaking plate hard alloy according to claim 1, which is characterized in that burnt described in step S4
Junction temperature is 1450 DEG C, and final temperature soaking time is 2h.
8. the side that a kind of soaking plate using the preparation of claim 1-3 any one the method prepares soaking plate with hard alloy
Method, which comprises the following steps:
Y1. it by the way that the soaking plate baked to be placed in heat-treatment furnace with hard alloy, under first vacuum state, is warming up to
1250-1270 DEG C, keep the temperature 60-100min；
Y2. high pure nitrogen is then passed to, soaking plate is quickly cooled to 750-780 DEG C, keeps the temperature 30- by pressure 2-3bar
Then 60min cools to 450-480 DEG C with the furnace, keep the temperature 180-240min, and then furnace cooling obtains soaking plate.
9. according to claim 8 method preparation soaking plate for bend glass it is hot-forming in.
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