CN105734379A - Injection mold core - Google Patents

Injection mold core Download PDF

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Publication number
CN105734379A
CN105734379A CN201610117351.XA CN201610117351A CN105734379A CN 105734379 A CN105734379 A CN 105734379A CN 201610117351 A CN201610117351 A CN 201610117351A CN 105734379 A CN105734379 A CN 105734379A
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parts
powder
injection core
hard phase
weight
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Chinese (zh)
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李逸博
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Priority to CN201610117351.XA priority Critical patent/CN105734379A/en
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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
    • 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
    • B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
    • B22F3/17—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces by forging
    • 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
    • B22F5/00—Manufacture of workpieces or articles from metallic powder characterised by the special shape of the product
    • B22F5/007—Manufacture of workpieces or articles from metallic powder characterised by the special shape of the product of moulds
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C33/00—Moulds or cores; Details thereof or accessories therefor
    • B29C33/38—Moulds or cores; Details thereof or accessories therefor characterised by the material or the manufacturing process
    • B29C33/3842—Manufacturing moulds, e.g. shaping the mould surface by machining
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/17—Component parts, details or accessories; Auxiliary operations
    • B29C45/26—Moulds
    • B29C45/2602—Mould construction elements
    • 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
    • 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
    • B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
    • B22F3/17—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces by forging
    • B22F2003/175—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces by forging by hot forging, below sintering temperature
    • 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
    • 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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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Powder Metallurgy (AREA)
  • Ceramic Products (AREA)

Abstract

The invention discloses an injection mold core. The injection mold core is characterized by consisting of a steel hard alloy; preparation raw materials of the steel hard alloy include a hard phase and steel base adhesive; components of the steel base adhesive are higher in strength; the strength of the steel hard alloy is further improved under the effect of the hard phase; preparation procedures are simpler through pressing, sintering, heating, forging, annealing, machining, quenching and tempering procedures; and the cost is reduced.

Description

A kind of injection core
Technical field
The present invention relates to a kind of injection core, belongs to technical field of mold.
Background technology
Mould generally comprises dynamic model and cover half, one set of die can only produce a kind of product, want to produce other product needed and design new dynamic model and cover half, existing mold can introduce core rod and mould is designed, the major part mould containing core rod also cannot realize changing core rod and realize producing the function of different product, it is desirable to during other products of volume production, it is necessary to whole set of die disassembled, the mould being replaced with correspondence produces, and such design have impact on work efficiency and also considerably increases production cost.
Summary of the invention
A kind of injection core, it is characterised in that injection core is made up of steel bonded carbide, steel bonded carbide manufactures raw material and includes hard phase and base steel binding agent, hard phase (weight) is by titanium nitride 20-30 part, two chromium boride 10-20 parts, chromium carbide 4 parts, yittrium oxide 2 parts, lanthana 2 parts composition；Base steel binding agent (weight) is by C0.5-0.6%, Mg1-2%, Nb2-3%, Mn0.6-0.7%, V0.2-0.3%, Ag0.06-0.07%, Ba0.02-0.03%, Zr0.02-0.03%, B0.01-0.02%, and surplus is Fe composition；The weight ratio of hard phase and base steel binding agent is 1.5,
Steel bonded carbide mixes through powder, compacting sintering, heats forged, annealing, machining, quenching, and tempering process is prepared from:
Wherein in powder mixed processes: weigh titanium nitride, two chromium borides, chromium carbide, yittrium oxide, lanthanum oxide powder mixes according to aforementioned proportion, carries out ball milling alloying according to ratio of grinding media to material 15:1, and abrading-ball is hardened steel ball, Ball-milling Time 30h, applies the high-purity argon gas of more than 99.9%, it is thus achieved that hard phase powder；Weighing base steel adhesive powder, carry out ball milling, Ball-milling Time 40h according to ratio of grinding media to material 16:1, interpolation dehydrated alcohol is process control agent；Hard phase powder after ball milling and base steel adhesive powder are mixed, ball milling 20 hours again, it is thus achieved that steel bonded carbide mixed-powder；
Wherein in compacting sintering operation: the steel bonded carbide mixed-powder of above-mentioned acquisition is dried, screening, it is pressed into required size shape；Then carrying out vacuum-sintering, 50 DEG C/min of heating rate carries out insulation 1 hour when being warming up to 1190 DEG C,
Wherein in heats forged operation: initial forging temperature is at 1180 DEG C, and final forging temperature is at 960 DEG C；
Wherein in annealing operation: annealing temperature 820-830 DEG C, keep 4-5h, after then cooling to 150 DEG C with the furnace, take out natural cooling in air；
Wherein quenching, in tempering process: the temperature of described Quenching Treatment is 1030 DEG C, described temper is heated to 520 DEG C from room temperature by workpiece, heating rate 35 DEG C/h, be incubated 2 hours, after be cooled to 330 DEG C, rate of temperature fall 24 DEG C/h, it is incubated 5 hours, after be again cooled to 220 DEG C, rate of temperature fall 20 DEG C/h, be incubated 3 hours, rear air cooling, to room temperature, finally gives injection core.
Described a kind of injection core, base steel binding agent (weight) is by C0.5%, Mg1%, Nb2%, Mn0.6%, V0.2%, Ag0.06%, Ba0.02%, Zr0.02%, B0.01%, and surplus is Fe composition.
Described a kind of injection core, base steel binding agent (weight) is by C0.6%, Mg2%, Nb3%, Mn0.7%, V0.3%, Ag0.07%, Ba0.03%, Zr0.03%, B0.02%, and surplus is Fe composition.
Described a kind of injection core, base steel binding agent (weight) is by C0.55%, Mg1.5%, Nb2.5%, Mn0.65%, V0.25%, Ag0.065%, Ba0.025%, Zr0.025%, B0.015%, and surplus is Fe composition.
Described a kind of injection core, hard phase (weight) is by titanium nitride 20 parts, two chromium borides 10 parts, chromium carbide 4 parts, yittrium oxide 2 parts, lanthana 2 parts composition.
Described a kind of injection core, hard phase (weight) is by titanium nitride 30 parts, two chromium borides 20 parts, chromium carbide 4 parts, yittrium oxide 2 parts, lanthana 2 parts composition.
Described a kind of injection core, hard phase (weight) is by titanium nitride 25 parts, two chromium borides 15 parts, chromium carbide 4 parts, yittrium oxide 2 parts, lanthana 2 parts composition.
Described a kind of injection core, wherein in annealing operation: annealing temperature 820 DEG C, keeps 4.5h, takes out natural cooling in air after then cooling to 150 DEG C with the furnace.
Described a kind of injection core, wherein in annealing operation: annealing temperature 830 DEG C, keeps 4h, takes out natural cooling in air after then cooling to 150 DEG C with the furnace.
Described a kind of injection core, wherein in annealing operation: annealing temperature 825 DEG C, keeps 5h, takes out natural cooling in air after then cooling to 150 DEG C with the furnace.
A kind of manufacture method of injection core, it is characterized in that injection core is made up of steel bonded carbide, steel bonded carbide manufactures raw material and includes hard phase and base steel binding agent, hard phase (weight) is by titanium nitride 20-30 part, two chromium boride 10-20 parts, chromium carbide 4 parts, yittrium oxide 2 parts, lanthana 2 parts composition；Base steel binding agent (weight) is by C0.5-0.6%, Mg1-2%, Nb2-3%, Mn0.6-0.7%, V0.2-0.3%, Ag0.06-0.07%, Ba0.02-0.03%, Zr0.02-0.03%, B0.01-0.02%, and surplus is Fe composition；The weight ratio of hard phase and base steel binding agent is 1.5,
Steel bonded carbide mixes through powder, compacting sintering, heats forged, annealing, machining, quenching, and tempering process is prepared from:
Wherein in powder mixed processes: weigh titanium nitride, two chromium borides, chromium carbide, yittrium oxide, lanthanum oxide powder mixes according to aforementioned proportion, carries out ball milling alloying according to ratio of grinding media to material 15:1, and abrading-ball is hardened steel ball, Ball-milling Time 30h, applies the high-purity argon gas of more than 99.9%, it is thus achieved that hard phase powder；Weighing base steel adhesive powder, carry out ball milling, Ball-milling Time 40h according to ratio of grinding media to material 16:1, interpolation dehydrated alcohol is process control agent；Hard phase powder after ball milling and base steel adhesive powder are mixed, ball milling 20 hours again, it is thus achieved that steel bonded carbide mixed-powder；
Wherein in compacting sintering operation: the steel bonded carbide mixed-powder of above-mentioned acquisition is dried, screening, it is pressed into required size shape；Then carrying out vacuum-sintering, 50 DEG C/min of heating rate carries out insulation 1 hour when being warming up to 1190 DEG C,
Wherein in heats forged operation: initial forging temperature is at 1180 DEG C, and final forging temperature is at 960 DEG C；
Wherein in annealing operation: annealing temperature 820-830 DEG C, keep 4-5h, after then cooling to 150 DEG C with the furnace, take out natural cooling in air；
Wherein quenching, in tempering process: the temperature of described Quenching Treatment is 1030 DEG C, described temper is heated to 520 DEG C from room temperature by workpiece, heating rate 35 DEG C/h, be incubated 2 hours, after be cooled to 330 DEG C, rate of temperature fall 24 DEG C/h, it is incubated 5 hours, after be again cooled to 220 DEG C, rate of temperature fall 20 DEG C/h, be incubated 3 hours, rear air cooling, to room temperature, finally gives injection core.
Foregoing invention content having the beneficial effects that relative to prior art: 1) hard phase is by titanium nitride in injection core of the present invention, and two chromium borides, chromium carbide, yittrium oxide, lanthana composition improves the mechanical performance of material；2) composition of base steel binding agent has higher-strength, then under the effect of hard phase, steel bonded carbide intensity obtains further raising, and 3) pass through compacting sintering, heats forged, annealing, machining, quenching, tempering process makes manufacturing process more simple, reduces cost.
Detailed description of the invention
In order to the technical characteristic of the present invention, purpose and effect are more clearly understood from, now describe the specific embodiment of the present invention in detail.
Embodiment 1
A kind of injection core, it is characterised in that injection core is made up of steel bonded carbide, steel bonded carbide manufactures raw material and includes hard phase and base steel binding agent, hard phase (weight) is by titanium nitride 20 parts, two chromium borides 10 parts, chromium carbide 4 parts, yittrium oxide 2 parts, lanthana 2 parts composition；Base steel binding agent (weight) is by C0.5%, Mg1%, Nb2%, Mn0.6%, V0.2%, Ag0.06%, Ba0.02%, Zr0.02%, B0.01%, and surplus is Fe composition；The weight ratio of hard phase and base steel binding agent is 1.5,
Steel bonded carbide mixes through powder, compacting sintering, heats forged, annealing, machining, quenching, and tempering process is prepared from:
Wherein in powder mixed processes: weigh titanium nitride, two chromium borides, chromium carbide, yittrium oxide, lanthanum oxide powder mixes according to aforementioned proportion, carries out ball milling alloying according to ratio of grinding media to material 15:1, and abrading-ball is hardened steel ball, Ball-milling Time 30h, applies the high-purity argon gas of more than 99.9%, it is thus achieved that hard phase powder；Weighing base steel adhesive powder, carry out ball milling, Ball-milling Time 40h according to ratio of grinding media to material 16:1, interpolation dehydrated alcohol is process control agent；Hard phase powder after ball milling and base steel adhesive powder are mixed, ball milling 20 hours again, it is thus achieved that steel bonded carbide mixed-powder；
Wherein in compacting sintering operation: the steel bonded carbide mixed-powder of above-mentioned acquisition is dried, screening, it is pressed into required size shape；Then carrying out vacuum-sintering, 50 DEG C/min of heating rate carries out insulation 1 hour when being warming up to 1190 DEG C,
Wherein in heats forged operation: initial forging temperature is at 1180 DEG C, and final forging temperature is at 960 DEG C；
Wherein in annealing operation: annealing temperature 820 DEG C, keep 4h, after then cooling to 150 DEG C with the furnace, take out natural cooling in air；
Wherein quenching, in tempering process: the temperature of described Quenching Treatment is 1030 DEG C, described temper is heated to 520 DEG C from room temperature by workpiece, heating rate 35 DEG C/h, be incubated 2 hours, after be cooled to 330 DEG C, rate of temperature fall 24 DEG C/h, it is incubated 5 hours, after be again cooled to 220 DEG C, rate of temperature fall 20 DEG C/h, be incubated 3 hours, rear air cooling, to room temperature, finally gives injection core.
Embodiment 2
A kind of injection core, it is characterised in that injection core is made up of steel bonded carbide, steel bonded carbide manufactures raw material and includes hard phase and base steel binding agent, hard phase (weight) is by titanium nitride 30 parts, two chromium borides 20 parts, chromium carbide 4 parts, yittrium oxide 2 parts, lanthana 2 parts composition；Base steel binding agent (weight) is by C0.6%, Mg2%, Nb3%, Mn0.7%, V0.3%, Ag0.07%, Ba0.03%, Zr0.03%, B0.02%, and surplus is Fe composition；The weight ratio of hard phase and base steel binding agent is 1.5,
Steel bonded carbide mixes through powder, compacting sintering, heats forged, annealing, machining, quenching, and tempering process is prepared from:
Wherein in powder mixed processes: weigh titanium nitride, two chromium borides, chromium carbide, yittrium oxide, lanthanum oxide powder mixes according to aforementioned proportion, carries out ball milling alloying according to ratio of grinding media to material 15:1, and abrading-ball is hardened steel ball, Ball-milling Time 30h, applies the high-purity argon gas of more than 99.9%, it is thus achieved that hard phase powder；Weighing base steel adhesive powder, carry out ball milling, Ball-milling Time 40h according to ratio of grinding media to material 16:1, interpolation dehydrated alcohol is process control agent；Hard phase powder after ball milling and base steel adhesive powder are mixed, ball milling 20 hours again, it is thus achieved that steel bonded carbide mixed-powder；
Wherein in compacting sintering operation: the steel bonded carbide mixed-powder of above-mentioned acquisition is dried, screening, it is pressed into required size shape；Then carrying out vacuum-sintering, 50 DEG C/min of heating rate carries out insulation 1 hour when being warming up to 1190 DEG C,
Wherein in heats forged operation: initial forging temperature is at 1180 DEG C, and final forging temperature is at 960 DEG C；
Wherein in annealing operation: annealing temperature 830 DEG C, keep 5h, after then cooling to 150 DEG C with the furnace, take out natural cooling in air；
Wherein quenching, in tempering process: the temperature of described Quenching Treatment is 1030 DEG C, described temper is heated to 520 DEG C from room temperature by workpiece, heating rate 35 DEG C/h, be incubated 2 hours, after be cooled to 330 DEG C, rate of temperature fall 24 DEG C/h, it is incubated 5 hours, after be again cooled to 220 DEG C, rate of temperature fall 20 DEG C/h, be incubated 3 hours, rear air cooling, to room temperature, finally gives injection core.
Embodiment 3
A kind of injection core, it is characterised in that injection core is made up of steel bonded carbide, steel bonded carbide manufactures raw material and includes hard phase and base steel binding agent, hard phase (weight) is by titanium nitride 25 parts, two chromium borides 15 parts, chromium carbide 4 parts, yittrium oxide 2 parts, lanthana 2 parts composition；Base steel binding agent (weight) is by C0.55%, Mg1.5%, Nb2.5%, Mn0.65%, V0.25%, Ag0.065%, Ba0.025%, Zr0.025%, B0.015%, and surplus is Fe composition；The weight ratio of hard phase and base steel binding agent is 1.5,
Steel bonded carbide mixes through powder, compacting sintering, heats forged, annealing, machining, quenching, and tempering process is prepared from:
Wherein in powder mixed processes: weigh titanium nitride, two chromium borides, chromium carbide, yittrium oxide, lanthanum oxide powder mixes according to aforementioned proportion, carries out ball milling alloying according to ratio of grinding media to material 15:1, and abrading-ball is hardened steel ball, Ball-milling Time 30h, applies the high-purity argon gas of more than 99.9%, it is thus achieved that hard phase powder；Weighing base steel adhesive powder, carry out ball milling, Ball-milling Time 40h according to ratio of grinding media to material 16:1, interpolation dehydrated alcohol is process control agent；Hard phase powder after ball milling and base steel adhesive powder are mixed, ball milling 20 hours again, it is thus achieved that steel bonded carbide mixed-powder；
Wherein in compacting sintering operation: the steel bonded carbide mixed-powder of above-mentioned acquisition is dried, screening, it is pressed into required size shape；Then carrying out vacuum-sintering, 50 DEG C/min of heating rate carries out insulation 1 hour when being warming up to 1190 DEG C,
Wherein in heats forged operation: initial forging temperature is at 1180 DEG C, and final forging temperature is at 960 DEG C；
Wherein in annealing operation: annealing temperature 825 DEG C, keep 4-5h, after then cooling to 150 DEG C with the furnace, take out natural cooling in air；
Wherein quenching, in tempering process: the temperature of described Quenching Treatment is 1030 DEG C, described temper is heated to 520 DEG C from room temperature by workpiece, heating rate 35 DEG C/h, be incubated 2 hours, after be cooled to 330 DEG C, rate of temperature fall 24 DEG C/h, it is incubated 5 hours, after be again cooled to 220 DEG C, rate of temperature fall 20 DEG C/h, be incubated 3 hours, rear air cooling, to room temperature, finally gives injection core.
Embodiment 4
A kind of injection core, it is characterised in that injection core is made up of steel bonded carbide, steel bonded carbide manufactures raw material and includes hard phase and base steel binding agent, hard phase (weight) is by titanium nitride 22 parts, two chromium borides 11 parts, chromium carbide 4 parts, yittrium oxide 2 parts, lanthana 2 parts composition；Base steel binding agent (weight) is by C0.53%, Mg1.4%, Nb2.3%, Mn0.62%, V0.23%, Ag0.064%, Ba0.022%, Zr0.021%, B0.012%, and surplus is Fe composition；The weight ratio of hard phase and base steel binding agent is 1.5,
Steel bonded carbide mixes through powder, compacting sintering, heats forged, annealing, machining, quenching, and tempering process is prepared from:
Wherein in powder mixed processes: weigh titanium nitride, two chromium borides, chromium carbide, yittrium oxide, lanthanum oxide powder mixes according to aforementioned proportion, carries out ball milling alloying according to ratio of grinding media to material 15:1, and abrading-ball is hardened steel ball, Ball-milling Time 30h, applies the high-purity argon gas of more than 99.9%, it is thus achieved that hard phase powder；Weighing base steel adhesive powder, carry out ball milling, Ball-milling Time 40h according to ratio of grinding media to material 16:1, interpolation dehydrated alcohol is process control agent；Hard phase powder after ball milling and base steel adhesive powder are mixed, ball milling 20 hours again, it is thus achieved that steel bonded carbide mixed-powder；
Wherein in compacting sintering operation: the steel bonded carbide mixed-powder of above-mentioned acquisition is dried, screening, it is pressed into required size shape；Then carrying out vacuum-sintering, 50 DEG C/min of heating rate carries out insulation 1 hour when being warming up to 1190 DEG C,
Wherein in heats forged operation: initial forging temperature is at 1180 DEG C, and final forging temperature is at 960 DEG C；
Wherein in annealing operation: annealing temperature 823 DEG C, keep 4-5h, after then cooling to 150 DEG C with the furnace, take out natural cooling in air；
Wherein quenching, in tempering process: the temperature of described Quenching Treatment is 1030 DEG C, described temper is heated to 520 DEG C from room temperature by workpiece, heating rate 35 DEG C/h, be incubated 2 hours, after be cooled to 330 DEG C, rate of temperature fall 24 DEG C/h, it is incubated 5 hours, after be again cooled to 220 DEG C, rate of temperature fall 20 DEG C/h, be incubated 3 hours, rear air cooling, to room temperature, finally gives injection core.
Embodiment 5
A kind of injection core, it is characterised in that injection core is made up of steel bonded carbide, steel bonded carbide manufactures raw material and includes hard phase and base steel binding agent, hard phase (weight) is by titanium nitride 28 parts, two chromium borides 17 parts, chromium carbide 4 parts, yittrium oxide 2 parts, lanthana 2 parts composition；Base steel binding agent (weight) is by C0.56%, Mg1.7%, Nb2.8%, Mn0.68%, V0.27%, Ag0.066%, Ba0.027%, Zr0.028%, B0.019%, and surplus is Fe composition；The weight ratio of hard phase and base steel binding agent is 1.5,
Steel bonded carbide mixes through powder, compacting sintering, heats forged, annealing, machining, quenching, and tempering process is prepared from:
Wherein in powder mixed processes: weigh titanium nitride, two chromium borides, chromium carbide, yittrium oxide, lanthanum oxide powder mixes according to aforementioned proportion, carries out ball milling alloying according to ratio of grinding media to material 15:1, and abrading-ball is hardened steel ball, Ball-milling Time 30h, applies the high-purity argon gas of more than 99.9%, it is thus achieved that hard phase powder；Weighing base steel adhesive powder, carry out ball milling, Ball-milling Time 40h according to ratio of grinding media to material 16:1, interpolation dehydrated alcohol is process control agent；Hard phase powder after ball milling and base steel adhesive powder are mixed, ball milling 20 hours again, it is thus achieved that steel bonded carbide mixed-powder；
Wherein in compacting sintering operation: the steel bonded carbide mixed-powder of above-mentioned acquisition is dried, screening, it is pressed into required size shape；Then carrying out vacuum-sintering, 50 DEG C/min of heating rate carries out insulation 1 hour when being warming up to 1190 DEG C,
Wherein in heats forged operation: initial forging temperature is at 1180 DEG C, and final forging temperature is at 960 DEG C；
Wherein in annealing operation: annealing temperature 828 DEG C, keep 4-5h, after then cooling to 150 DEG C with the furnace, take out natural cooling in air；
Wherein quenching, in tempering process: the temperature of described Quenching Treatment is 1030 DEG C, described temper is heated to 520 DEG C from room temperature by workpiece, heating rate 35 DEG C/h, be incubated 2 hours, after be cooled to 330 DEG C, rate of temperature fall 24 DEG C/h, it is incubated 5 hours, after be again cooled to 220 DEG C, rate of temperature fall 20 DEG C/h, be incubated 3 hours, rear air cooling, to room temperature, finally gives injection core.

Claims (10)

1. an injection core, it is characterized in that injection core is made up of steel bonded carbide, steel bonded carbide manufactures raw material and includes hard phase and base steel binding agent, hard phase (weight) is by titanium nitride 20-30 part, two chromium boride 10-20 parts, chromium carbide 4 parts, yittrium oxide 2 parts, lanthana 2 parts composition；Base steel binding agent (weight) is by C0.5-0.6%, Mg1-2%, Nb2-3%, Mn0.6-0.7%, V0.2-0.3%, Ag0.06-0.07%, Ba0.02-0.03%, Zr0.02-0.03%, B0.01-0.02%, and surplus is Fe composition；The weight ratio of hard phase and base steel binding agent is 1.5,
Steel bonded carbide mixes through powder, compacting sintering, heats forged, annealing, machining, quenching, and tempering process is prepared from:
Wherein in powder mixed processes: weigh titanium nitride, two chromium borides, chromium carbide, yittrium oxide, lanthanum oxide powder mixes according to aforementioned proportion, carries out ball milling alloying according to ratio of grinding media to material 15:1, and abrading-ball is hardened steel ball, Ball-milling Time 30h, applies the high-purity argon gas of more than 99.9%, it is thus achieved that hard phase powder；Weighing base steel adhesive powder, carry out ball milling, Ball-milling Time 40h according to ratio of grinding media to material 16:1, interpolation dehydrated alcohol is process control agent；Hard phase powder after ball milling and base steel adhesive powder are mixed, ball milling 20 hours again, it is thus achieved that steel bonded carbide mixed-powder；
Wherein in compacting sintering operation: the steel bonded carbide mixed-powder of above-mentioned acquisition is dried, screening, it is pressed into required size shape；Then carrying out vacuum-sintering, 50 DEG C/min of heating rate carries out insulation 1 hour when being warming up to 1190 DEG C,
Wherein in heats forged operation: initial forging temperature is at 1180 DEG C, and final forging temperature is at 960 DEG C；
Wherein in annealing operation: annealing temperature 820-830 DEG C, keep 4-5h, after then cooling to 150 DEG C with the furnace, take out natural cooling in air；
Wherein quenching, in tempering process: the temperature of described Quenching Treatment is 1030 DEG C, described temper is heated to 520 DEG C from room temperature by workpiece, heating rate 35 DEG C/h, be incubated 2 hours, after be cooled to 330 DEG C, rate of temperature fall 24 DEG C/h, it is incubated 5 hours, after be again cooled to 220 DEG C, rate of temperature fall 20 DEG C/h, be incubated 3 hours, rear air cooling, to room temperature, finally gives injection core.
2. a kind of injection core as claimed in claim 2, base steel binding agent (weight) is by C0.5%, Mg1%, Nb2%, Mn0.6%, V0.2%, Ag0.06%, Ba0.02%, Zr0.02%, B0.01%, and surplus is Fe composition.
3. a kind of injection core as claimed in claim 1, base steel binding agent (weight) is by C0.6%, Mg2%, Nb3%, Mn0.7%, V0.3%, Ag0.07%, Ba0.03%, Zr0.03%, B0.02%, and surplus is Fe composition.
4. a kind of injection core as claimed in claim 1, base steel binding agent (weight) is by C0.55%, Mg1.5%, Nb2.5%, Mn0.65%, V0.25%, Ag0.065%, Ba0.025%, Zr0.025%, B0.015%, and surplus is Fe composition.
5. a kind of injection core as claimed in claim 1, hard phase (weight) is by titanium nitride 20 parts, two chromium borides 10 parts, chromium carbide 4 parts, yittrium oxide 2 parts, lanthana 2 parts composition.
6. a kind of injection core as claimed in claim 1, hard phase (weight) is by titanium nitride 30 parts, two chromium borides 20 parts, chromium carbide 4 parts, yittrium oxide 2 parts, lanthana 2 parts composition.
7. a kind of injection core as claimed in claim 1, hard phase (weight) is by titanium nitride 25 parts, two chromium borides 15 parts, chromium carbide 4 parts, yittrium oxide 2 parts, lanthana 2 parts composition.
8. a kind of injection core as claimed in claim 1, wherein in annealing operation: annealing temperature 820 DEG C, keeps 4.5h, takes out natural cooling in air after then cooling to 150 DEG C with the furnace.
9. a kind of injection core as claimed in claim 1, wherein in annealing operation: annealing temperature 830 DEG C, keeps 4h, takes out natural cooling in air after then cooling to 150 DEG C with the furnace.
10. a kind of injection core as claimed in claim 1, wherein in annealing operation: annealing temperature 825 DEG C, keeps 5h, takes out natural cooling in air after then cooling to 150 DEG C with the furnace.
CN201610117351.XA 2016-03-02 2016-03-02 Injection mold core Pending CN105734379A (en)

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