CN109852832A - A kind of gradient hard alloy die press technology for forming - Google Patents
A kind of gradient hard alloy die press technology for forming Download PDFInfo
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- CN109852832A CN109852832A CN201910088387.3A CN201910088387A CN109852832A CN 109852832 A CN109852832 A CN 109852832A CN 201910088387 A CN201910088387 A CN 201910088387A CN 109852832 A CN109852832 A CN 109852832A
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Abstract
The invention discloses a kind of gradient hard alloy die press technology for forming, including production stage: Step 1: preparing two kinds of qualified raw material；Two kinds of qualified raw material are respectively the tungsten carbide of different grain sizes；Step 2: compression moulding: the first raw material being packed into mold first, presses raw materials into type under stress, second of raw material is then packed into mold, forms second of raw material under stress；Step 3: sintering: a, pre-sintering: being pre-sintered pressure embryo after the completion of molding；B, HIP is handled: the pressure embryo after pre-sintering is carried out HIP processing；C, gradient is handled: sintered product is placed in vacuum at 1450 degrees Celsius and handles 2 hours；Step 4: sintering processes.The gradient hard alloy that the present invention produces has the advantages of high rigidity, high tenacity, and gradient hard alloy is provided simultaneously with the characteristic of high Binder Phase and high hard phase, and then improves the hardness and toughness of graded alloy.
Description
Technical field
The present invention relates to hard alloy technical field, specially a kind of gradient hard alloy die press technology for forming.
Background technique
Hard alloy is hard compounds and binding metal one kind made of powder metallurgical technique of refractory metal
Alloy material, hard alloy have a series of excellent performances such as hardness is high, wear-resisting, intensity and toughness are preferable, heat-resisting, corrosion-resistant,
Especially its high rigidity and wearability, even if 500 DEG C at a temperature of be held essentially constant, still have at 1000 DEG C very high
Hardness, hard alloy is widely used as cutter material, such as lathe tool, milling cutter, planing tool, drill bit, boring cutter, for cutting cast iron, has
Non-ferrous metal, plastics, chemical fibre, graphite, glass, stone material and common iron, can also be used to cutting heat resisting steel, stainless steel, potassium steel,
The difficult to machine materials such as tool steel, hard alloy have very high hardness, intensity, wearability and corrosion resistance, are known as " industry
Tooth " is widely used in military project, space flight and aviation, machinery and adds for manufacturing cutting element, cutter, cobalt tool and wear-resisting spare part
The fields such as work, metallurgy, oil drilling, mine tool, telecommunications, building, with the development of downstream industry, hard alloy market
Demand continues to increase, and the manufacture of the following new- and high-tech weaponry and equipment, the progress of advanced science technology and nuclear power source it is quick
Development will improve the demand of hart metal product to high technology content and high quality stability energetically.
Hard alloy made by traditional moulding process there are a kind of contradiction characteristic, i.e., hard alloy Binder Phase content compared with
High hard phase content is lower, so alloy rigidity is low and toughness is high；The higher lower alloy of Binder Phase content of hard phase content is hard
Degree is high and poor toughness, it is difficult to meet the high rigidity that modern social development proposes hard alloy, double high requests of high tenacity.
Summary of the invention
The purpose of the present invention is to provide a kind of gradient hard alloy die press technology for forming, have high rigidity, high tenacity
Advantage, solving hard alloy made by traditional moulding process, there are a kind of contradiction characteristic, i.e., uniform hard alloy bondings
The higher hard phase content of phase content is lower, so alloy rigidity is low and toughness is high；The higher Binder Phase content of hard phase content is lower
Alloy rigidity is high and poor toughness, it is difficult to meet the high rigidity that modern social development proposes hard alloy, double height of high tenacity
It is required that the problem of.
To achieve the above object, the invention provides the following technical scheme: a kind of gradient hard alloy die press technology for forming, packet
Include production stage:
Step 1: preparing two kinds of qualified raw material；Two kinds of qualified raw material are respectively the tungsten carbide of different grain sizes；
Step 2: compression moulding: the first raw material being packed into mold first, presses raw materials into type under stress, then
Second of raw material is packed into mold, forms second of raw material under stress；
Step 3: sintering:
A, it is pre-sintered: being pre-sintered pressure embryo after the completion of molding；
B, HIP is handled: the pressure embryo after pre-sintering being carried out HIP processing, to form scarce cubic phase carbon on the surface of alloy
The toughness area of compound；
C, gradient is handled: sintered product is placed in vacuum at 1450 degrees Celsius and handles 2 hours；
Step 4: sintering processes: sinter molding product are cut open along center line, to cut surface carry out surface grinding, polishing and
Corrosion treatment；
Step 5: sandblasting: sand material being heated to molten condition with the body flame that plasma gun generates, molten sand material is waiting
The load of ion flame stream draws lower high speed and bangs into workpiece surface and form coating；
Step 6: finished product inspection: carrying out passed examination to finished product by detecting instrument；
Step 7: being packed and stored: being packed in storage after finished product inspection is qualified.
Preferably, the temperature of HIP processing is 1260 degrees Celsius to 1380 degrees Celsius, when temperature be 1260 degrees Celsius extremely
Start the nitrogen that certain pressure is poured to vacuum system at 1380 degrees Celsius, when temperature reaches 1400 degrees Celsius to 1500 degrees Celsius
When keep the temperature 10 to 20 minutes at such a temperature, sample furnace cooling.
Preferably, the temperature of the pre-sintering is at 1000 degrees Celsius to 1250 degrees Celsius, during pre-sintering, pushes away boat speed
It is 3.2 millimeters per minute, sintering furnace high temperature strip length is 1100 millimeters, and boat length is 320 millimeters.
Preferably, molded product is cut with cutter device in the sintering processes, with grinding device to cut surface into
Row grinding, is polished with burnishing device.
Preferably, the temperature of the sandblasting plasma flame is 6000 degrees Celsius to 8000 degrees Celsius, plasma gun work
It is injected separately into different sand material when making on each suitable position in rifle, and the opposite of various sand material is controlled by control device
Delivery rate deposits various sand material in turn, changes thickness in the multilayered structure being sequentially depositing.
Compared with prior art, beneficial effects of the present invention are as follows:
1, the gradient hard alloy that the present invention produces has the advantages of high rigidity, high tenacity, and gradient hard alloy is simultaneously
Have the characteristic of high Binder Phase and high hard phase, and then improves the hardness and toughness of graded alloy.
2, the purpose of the present invention knot braised in soy sauce is mainly de- binder and deoxidation and obtains dense sintering body, so as to subsequent
Gradient processing operation in form gradient-structure.
Specific embodiment
The following is a clear and complete description of the technical scheme in the embodiments of the invention, it is clear that described embodiment
Only a part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, the common skill in this field
Art personnel every other embodiment obtained without making creative work belongs to the model that the present invention protects
It encloses.
Embodiment one: a kind of gradient hard alloy die press technology for forming, including production stage:
Step 1: preparing two kinds of qualified raw material；Two kinds of qualified raw material are respectively the tungsten carbide of different grain sizes；
Step 2: compression moulding: the first raw material being packed into mold first, presses raw materials into type under stress, then
Second of raw material is packed into mold, forms second of raw material under stress；
Step 3: sintering:
A, it is pre-sintered: controlling the temperature that pressure embryo is pre-sintered, and is pre-sintered at 1120 degrees Celsius, in advance after the completion of molding
In sintering process, pushing away boat speed is 3.2 millimeters per minute, and sintering furnace high temperature strip length is 1100 millimeters, and boat length is 320 millis
Rice；
B, HIP is handled: after pre-sintering, starting the nitrogen that certain pressure is poured to vacuum system when temperature is 1360 degrees Celsius
Gas keeps the temperature 13 minutes when temperature reaches 1490 degrees Celsius at such a temperature, sample furnace cooling, thus in the surface shape of alloy
At the toughness area of scarce cubic carbides；
C, gradient is handled: the product after pre-sintering is placed in vacuum at 1450 degrees Celsius and handles 2 hours；
Step 4: sintering processes: molded product will be pre-sintered and cut open with cutter device along center line, with grinding device to cutting
Face carries out surface grinding, carries out polishing and corrosion treatment with burnishing device；
Step 5: sandblasting: sand material being heated to molten condition, the temperature of plasma flame with the body flame that plasma gun generates
Degree is 7500 degrees Celsius, and plasma gun is injected separately into different sand material when working in rifle on each suitable position, and passes through
Control device controls the opposite delivery rate of various sand material, deposits various sand material in turn, changes in the multilayered structure being sequentially depositing
Change layer is thick, and molten sand material draws lower high speed in the load of plasma flame flow and bangs into workpiece surface and form coating；
Step 6: finished product inspection: carrying out passed examination to finished product by detecting instrument；
Step 7: being packed and stored: being packed in storage after finished product inspection is qualified.
Embodiment two, the difference between this embodiment and the first embodiment lies in: a kind of gradient hard alloy die press technology for forming, packet
Include production stage:
Step 1: preparing two kinds of qualified raw material；Two kinds of qualified raw material are respectively the tungsten carbide of different grain sizes；
Step 2: compression moulding: the first raw material being packed into mold first, presses raw materials into type under stress, then
Second of raw material is packed into mold, forms second of raw material under stress；
Step 3: sintering:
A, it is pre-sintered: controlling the temperature that pressure embryo is pre-sintered, and is pre-sintered at 1180 degrees Celsius, in advance after the completion of molding
In sintering process, pushing away boat speed is 3.2 millimeters per minute, and sintering furnace high temperature strip length is 1100 millimeters, and boat length is 320 millis
Rice；
B, HIP is handled: after pre-sintering, starting the nitrogen that certain pressure is poured to vacuum system when temperature is 1320 degrees Celsius
Gas keeps the temperature 15 minutes when temperature reaches 1470 degrees Celsius at such a temperature, sample furnace cooling, thus in the surface shape of alloy
At the toughness area of scarce cubic carbides；
C, gradient is handled: the product after pre-sintering is placed in vacuum at 1450 degrees Celsius and handles 2 hours；
Step 4: sintering processes: molded product will be pre-sintered and cut open with cutter device along center line, with grinding device to cutting
Face carries out surface grinding, carries out polishing and corrosion treatment with burnishing device；
Step 5: sandblasting: sand material being heated to molten condition, the temperature of plasma flame with the body flame that plasma gun generates
Degree is 7500 degrees Celsius, and plasma gun is injected separately into different sand material when working in rifle on each suitable position, and passes through
Control device controls the opposite delivery rate of various sand material, deposits various sand material in turn, changes in the multilayered structure being sequentially depositing
Change layer is thick, and molten sand material draws lower high speed in the load of plasma flame flow and bangs into workpiece surface and form coating；
Step 6: finished product inspection: carrying out passed examination to finished product by detecting instrument；
Step 7: being packed and stored: being packed in storage after finished product inspection is qualified.
Embodiment three, the present embodiment and the difference of embodiment one, embodiment two are: a kind of gradient hard alloy is molded into
Type technique, including production stage:
Step 1: preparing two kinds of qualified raw material；Two kinds of qualified raw material are respectively the tungsten carbide of different grain sizes；
Step 2: compression moulding: the first raw material being packed into mold first, presses raw materials into type under stress, then
Second of raw material is packed into mold, forms second of raw material under stress；
Step 3: sintering:
A, it is pre-sintered: controlling the temperature that pressure embryo is pre-sintered, and is pre-sintered at 1210 degrees Celsius, in advance after the completion of molding
In sintering process, pushing away boat speed is 3.2 millimeters per minute, and sintering furnace high temperature strip length is 1100 millimeters, and boat length is 320 millis
Rice；
B, HIP is handled: after pre-sintering, starting the nitrogen that certain pressure is poured to vacuum system when temperature is 1310 degrees Celsius
Gas keeps the temperature 16 minutes when temperature reaches 1460 degrees Celsius at such a temperature, sample furnace cooling, thus in the surface shape of alloy
At the toughness area of scarce cubic carbides；
C, gradient is handled: the product after pre-sintering is placed in vacuum at 1450 degrees Celsius and handles 2 hours；
Step 4: sintering processes: molded product will be pre-sintered and cut open with cutter device along center line, with grinding device to cutting
Face carries out surface grinding, carries out polishing and corrosion treatment with burnishing device；
Step 5: sandblasting: sand material being heated to molten condition, the temperature of plasma flame with the body flame that plasma gun generates
Degree is 7500 degrees Celsius, and plasma gun is injected separately into different sand material when working in rifle on each suitable position, and passes through
Control device controls the opposite delivery rate of various sand material, deposits various sand material in turn, changes in the multilayered structure being sequentially depositing
Change layer is thick, and molten sand material draws lower high speed in the load of plasma flame flow and bangs into workpiece surface and form coating；
Step 6: finished product inspection: carrying out passed examination to finished product by detecting instrument；
Step 7: being packed and stored: being packed in storage after finished product inspection is qualified.
Example IV: the present embodiment and the difference of embodiment one, embodiment two and embodiment three are: a kind of gradient hard
Alloy die press technology for forming, including production stage:
Step 1: preparing two kinds of qualified raw material；Two kinds of qualified raw material are respectively the tungsten carbide of different grain sizes；
Step 2: compression moulding: the first raw material being packed into mold first, presses raw materials into type under stress, then
Second of raw material is packed into mold, forms second of raw material under stress；
Step 3: sintering:
A, it is pre-sintered: controlling the temperature that pressure embryo is pre-sintered, and is pre-sintered at 1265 degrees Celsius, in advance after the completion of molding
In sintering process, pushing away boat speed is 3.2 millimeters per minute, and sintering furnace high temperature strip length is 1100 millimeters, and boat length is 320 millis
Rice；
B, HIP is handled: after pre-sintering, starting the nitrogen that certain pressure is poured to vacuum system when temperature is 1322 degrees Celsius
Gas keeps the temperature 17 minutes when temperature reaches 1456 degrees Celsius at such a temperature, sample furnace cooling, thus in the surface shape of alloy
At the toughness area of scarce cubic carbides；
C, gradient is handled: the product after pre-sintering is placed in vacuum at 1450 degrees Celsius and handles 2 hours；
Step 4: sintering processes: molded product will be pre-sintered and cut open with cutter device along center line, with grinding device to cutting
Face carries out surface grinding, carries out polishing and corrosion treatment with burnishing device；
Step 5: sandblasting: sand material being heated to molten condition, the temperature of plasma flame with the body flame that plasma gun generates
Degree is 7500 degrees Celsius, and plasma gun is injected separately into different sand material when working in rifle on each suitable position, and passes through
Control device controls the opposite delivery rate of various sand material, deposits various sand material in turn, changes in the multilayered structure being sequentially depositing
Change layer is thick, and molten sand material draws lower high speed in the load of plasma flame flow and bangs into workpiece surface and form coating；
Step 6: finished product inspection: carrying out passed examination to finished product by detecting instrument；
Step 7: being packed and stored: being packed in storage after finished product inspection is qualified.
It should be noted that, in this document, relational terms such as first and second and the like are used merely to a reality
Body or operation are distinguished with another entity or operation, are deposited without necessarily requiring or implying between these entities or operation
In any actual relationship or order or sequence.Moreover, the terms "include", "comprise" or its any other variant are intended to
Non-exclusive inclusion, so that the process, method, article or equipment including a series of elements is not only wanted including those
Element, but also including other elements that are not explicitly listed, or further include for this process, method, article or equipment
Intrinsic element.
It although an embodiment of the present invention has been shown and described, for the ordinary skill in the art, can be with
A variety of variations, modification, replacement can be carried out to these embodiments without departing from the principles and spirit of the present invention by understanding
And modification, the scope of the present invention is defined by the appended.
Claims (5)
1. a kind of gradient hard alloy die press technology for forming, which is characterized in that including production stage:
Step 1: preparing two kinds of qualified raw material, two kinds of qualified raw material are respectively the tungsten carbide of different grain sizes；
Step 2: compression moulding: the first raw material being packed into mold first, presses raw materials into type under stress, then by the
Two kinds of raw materials are packed into mold, form second of raw material under stress；
Step 3: sintering:
A, it is pre-sintered: being pre-sintered pressure embryo after the completion of molding；
B, HIP is handled: the pressure embryo after pre-sintering being carried out HIP processing, to form scarce cubic carbides on the surface of alloy
Toughness area；
C, gradient is handled: sintered product is placed in vacuum at 1450 degrees Celsius and handles 2 hours；
Step 4: sintering processes: sinter molding product being cut open along center line, carry out surface grinding, polishing and corrosion to cut surface
Processing；
Step 5: sandblasting: sand material being heated to molten condition with the body flame that plasma gun generates, molten sand material is in plasma
The load of flame stream draws lower high speed and bangs into workpiece surface and form coating；
Step 6: finished product inspection: carrying out passed examination to finished product by detecting instrument；
Step 7: being packed and stored: being packed in storage after finished product inspection is qualified.
2. a kind of gradient hard alloy die press technology for forming according to claim 1, it is characterised in that: the HIP processing
Temperature be 1260 degrees Celsius to 1380 degrees Celsius, when temperature be 1260 degrees Celsius to 1380 degrees Celsius when start to vacuum system
The nitrogen for pouring certain pressure keeps the temperature 10 to 20 points when temperature reaches 1400 degrees Celsius to 1500 degrees Celsius at such a temperature
Clock, sample furnace cooling.
3. a kind of gradient hard alloy die press technology for forming according to claim 1, it is characterised in that: the pre-sintering
Temperature is at 1000 degrees Celsius to 1250 degrees Celsius, and during pre-sintering, pushing away boat speed is 3.2 millimeters per minute, sintering furnace high temperature
Strip length is 1100 millimeters, and boat length is 320 millimeters.
4. a kind of gradient hard alloy die press technology for forming according to claim 1, it is characterised in that: the sintering processes
It is middle that molded product is cut with cutter device, cut surface is ground with grinding device, is polished with burnishing device.
5. a kind of gradient hard alloy die press technology for forming according to claim 1, it is characterised in that: the sandblasting is medium
The temperature of gas ions flame is 6000 degrees Celsius to 8000 degrees Celsius, is divided on each suitable position in rifle when plasma gun works
Different sand material is not injected, and controls the opposite delivery rate of various sand material by control device, deposits various sand material in turn,
Change thickness in the multilayered structure being sequentially depositing.
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Citations (6)
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|---|---|---|---|---|
| JPS50159804A (en) * | 1974-06-17 | 1975-12-24 | ||
| EP0121769A1 (en) * | 1983-03-15 | 1984-10-17 | Stellram S.A. | Sintered alloy based on carbides, and article made from this alloy |
| JPS6383236A (en) * | 1986-09-25 | 1988-04-13 | Kobe Steel Ltd | Manufacture of sintered hard alloy excellent in thermal conductivity and combining high hardness with high toughness |
| CN104988373A (en) * | 2015-08-06 | 2015-10-21 | 广东工业大学 | Surface-hardened gradient cemented carbide and preparation method thereof |
| CN105177336A (en) * | 2015-09-07 | 2015-12-23 | 中南大学 | Method for rapidly preparing extra-coarse crystalline grain gradient hard alloy |
| CN107916357A (en) * | 2017-10-31 | 2018-04-17 | 自贡硬质合金有限责任公司 | A kind of gradient hard alloy of heterogeneous texture and preparation method thereof |
-
2019
- 2019-01-18 CN CN201910088387.3A patent/CN109852832A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS50159804A (en) * | 1974-06-17 | 1975-12-24 | ||
| EP0121769A1 (en) * | 1983-03-15 | 1984-10-17 | Stellram S.A. | Sintered alloy based on carbides, and article made from this alloy |
| JPS6383236A (en) * | 1986-09-25 | 1988-04-13 | Kobe Steel Ltd | Manufacture of sintered hard alloy excellent in thermal conductivity and combining high hardness with high toughness |
| CN104988373A (en) * | 2015-08-06 | 2015-10-21 | 广东工业大学 | Surface-hardened gradient cemented carbide and preparation method thereof |
| CN105177336A (en) * | 2015-09-07 | 2015-12-23 | 中南大学 | Method for rapidly preparing extra-coarse crystalline grain gradient hard alloy |
| CN107916357A (en) * | 2017-10-31 | 2018-04-17 | 自贡硬质合金有限责任公司 | A kind of gradient hard alloy of heterogeneous texture and preparation method thereof |
Non-Patent Citations (1)
| Title |
|---|
| 羊建高等: "用于涂层的梯度硬质合金基体的制备方法与梯度形成机理", 《粉末冶金技术》 * |
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Application publication date: 20190607 |