CN108251625A - A kind of anti-deformation process control method for preparing die casting - Google Patents
A kind of anti-deformation process control method for preparing die casting Download PDFInfo
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- CN108251625A CN108251625A CN201810086788.0A CN201810086788A CN108251625A CN 108251625 A CN108251625 A CN 108251625A CN 201810086788 A CN201810086788 A CN 201810086788A CN 108251625 A CN108251625 A CN 108251625A
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Classifications
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/0068—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for particular articles not mentioned below
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D17/00—Pressure die casting or injection die casting, i.e. casting in which the metal is forced into a mould under high pressure
- B22D17/20—Accessories: Details
- B22D17/22—Dies; Die plates; Die supports; Cooling equipment for dies; Accessories for loosening and ejecting castings from dies
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C8/00—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
- C23C8/06—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using gases
- C23C8/08—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using gases only one element being applied
- C23C8/24—Nitriding
- C23C8/26—Nitriding of ferrous surfaces
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C8/00—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
- C23C8/40—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using liquids, e.g. salt baths, liquid suspensions
- C23C8/42—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using liquids, e.g. salt baths, liquid suspensions only one element being applied
- C23C8/48—Nitriding
- C23C8/50—Nitriding of ferrous surfaces
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C8/00—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
- C23C8/60—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using solids, e.g. powders, pastes
- C23C8/62—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using solids, e.g. powders, pastes only one element being applied
Abstract
The invention discloses a kind of anti-deformation process control methods for preparing die casting, include the following steps：It is mold materials to choose P20 pre-hardening plastic die steel according to mold stress size, completes die blank manufacture；Die blank is put into vacuum quencher cool down by hardening media of liquid nitrogen after quenching for the first time；When die blank temperature drop to less than 100 DEG C be tempered under vacuum after Slow cooling；When die blank temperature drops to less than 100 DEG C progress secondary quenchings, and cooled down by hardening media of liquid nitrogen；When die blank temperature drop to less than 100 DEG C be tempered under vacuum after Slow cooling；Die blank surface is subjected to Nitrizing Treatment, finally completes mold assembling.The present invention uses the heat treatment process of double quenching, improves the thermal stability of mold materials, can ensure that die casting still keeps form and dimensional precision constant under long-term work environment, extend the service life of mold.
Description
Technical field：
The invention belongs to technology of die manufacturing fields, and in particular to a kind of anti-deformation process controlling party for preparing die casting
Method.
Background technology：
In the press casting procedure of mold, die casting machine will bear higher pressure, template be caused to be easy to deform, seriously
The quality of product is influenced, while is accompanied by security risk.Die-casting machine is integrally formed using cast at present, is replaced after deformation
The of high cost and need customized time is long.The quality and service life of die casting depend on the manufacturing process of die casting more,
The heat treatment processing link important as die casting, main purpose is exactly to adjust the mechanical property of mold materials, to reach anti-
The purpose for only deforming and prolonging the service life.For some defects of current mainstream die-casting die steel, heat treatment method uses more
Ultra-high temperature quenching although improving intensity, improves alloy carbide distribution, can cause the reduction of mold plasticity and toughness,
The problem of when die casting workpiece there are still easily deforming.
Invention content
The present invention is intended to provide a kind of anti-deformation process control method for preparing die casting, to optimize the heat treatment of mold
Condition improves the hardness and toughness of mold, prevents mold from deforming during casting.
In order to solve the above technical problems, the technical scheme is that：A kind of anti-deformation process control for preparing die casting
Method processed, includes the following steps：
(1) it is mold materials to choose P20 pre-hardening plastic die steel according to mold stress size, completes die blank system
It makes；
(2) die blank is put into vacuum quencher, is heated to 400 DEG C~500 DEG C and keeps the temperature 20min~30min, continued
Be warming up to 700 DEG C~800 DEG C and keep the temperature 40min~60min, be continuously heating to 1000 DEG C~1100 DEG C and keep the temperature 40min~
It is cooled down after 60min by hardening media of liquid nitrogen；
(3) be tempered under vacuum when die blank temperature drops to less than 100 DEG C, be slowly heated to 600 DEG C~
700 DEG C and keep the temperature Slow cooling after 40min~60min；
(4) secondary quenchings are carried out when die blank temperature drops to less than 100 DEG C, is heated to 350 DEG C~450 DEG C and keeps the temperature
20min~30min is continuously heating to 650 DEG C~750 DEG C and keeps the temperature 40min~60min, is continuously heating to 950 DEG C~1050 DEG C
And it is cooled down after keeping the temperature 40min~60min by hardening media of liquid nitrogen；
(5)) be tempered under vacuum when die blank temperature drops to less than 100 DEG C, be slowly heated to 500 DEG C~
600 DEG C and keep the temperature Slow cooling after 40min~60min；
(6) die blank surface is subjected to Nitrizing Treatment, heating mold to 245 DEG C and keeps the temperature 2h, continues to be heated to 555 DEG C
And 6h is kept the temperature, make nitriding complete, continue logical ammonia, while mold is made to come out of the stove after being quickly cooled to 200 DEG C with air blower；
(7) mold assembling is completed.
Further, the step (2) is that die blank is put into vacuum quencher, is heated to 450 DEG C and keeps the temperature
25min is continuously heating to 750 DEG C and keeps the temperature 50min, is situated between after being continuously heating to 1050 DEG C and keeping the temperature 50min by quenching of liquid nitrogen
Matter is cooled down.
Further, the step (4) is to carry out secondary quenchings when die blank temperature drops to 80 DEG C, is heated to 400 DEG C
And keep the temperature 25min, be continuously heating to 700 DEG C and keep the temperature 50min, after being continuously heating to 1000 DEG C and keeping the temperature 50min using liquid nitrogen as
Hardening media is cooled down.
Using above-mentioned technical proposal, the beneficial effects of the present invention are：The a kind of of the present invention prepares preapring for an unfavorable turn of events for die casting
Shape process control method using the heat treatment process of double quenching, improves the thermal stability of mold materials, has prevention mold
It is transformed into softer or mecystasis ability, can ensures that die casting still keeps shape and size smart under long-term work environment
It spends constant, extends the service life of mold.
Specific embodiment
The technical solution in the present invention is clearly and completely described below in conjunction with specific embodiment, it is clear that retouched
The embodiment stated is only part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, originally
Field those of ordinary skill all other embodiments obtained without making creative work, belong to the present invention
The range of protection.
Embodiment 1
A kind of anti-deformation process control method for preparing die casting of the present embodiment, includes the following steps：
(1) it is mold materials to choose P20 pre-hardening plastic die steel according to mold stress size, completes die blank system
It makes；
(2) die blank is put into vacuum quencher, is heated to 400 DEG C and keeps the temperature 30min, be continuously heating to 700 DEG C simultaneously
60min is kept the temperature, 1000 DEG C is continuously heating to and is cooled down after keeping the temperature 60min by hardening media of liquid nitrogen；
(3) it is tempered under vacuum when die blank temperature drops to 100 DEG C, is slowly heated to 600 DEG C and keeps the temperature
Slow cooling after 60min；
(4) secondary quenchings are carried out when die blank temperature drops to 100 DEG C, is heated to 350 DEG C and keeps the temperature 30min, after of continuing rising
Temperature is to 650 DEG C and keeps the temperature 60min, is continuously heating to 950 DEG C and is cooled down after keeping the temperature 60min by hardening media of liquid nitrogen；
(5)) it is tempered under vacuum when die blank temperature drops to 100 DEG C, is slowly heated to 500 DEG C and keeps the temperature
Slow cooling after 60min；
(6) die blank surface is subjected to Nitrizing Treatment, heating mold to 245 DEG C and keeps the temperature 2h, continues to be heated to 555 DEG C
And 6h is kept the temperature, make nitriding complete, continue logical ammonia, while mold is made to come out of the stove after being quickly cooled to 200 DEG C with air blower；
(7) mold assembling is completed.
Embodiment 2
A kind of anti-deformation process control method for preparing die casting of the present embodiment, include the following steps：
(1) it is mold materials to choose P20 pre-hardening plastic die steel according to mold stress size, completes die blank system
It makes；
(2) die blank is put into vacuum quencher, is heated to 450 DEG C and keeps the temperature 25min, be continuously heating to 750 DEG C simultaneously
50min is kept the temperature, 1050 DEG C is continuously heating to and is cooled down after keeping the temperature 50min by hardening media of liquid nitrogen；
(3) it is tempered under vacuum when die blank temperature drops to 80 DEG C, is slowly heated to 650 DEG C and keeps the temperature
Slow cooling after 50min；
(4) secondary quenchings are carried out when die blank temperature drops to 80 DEG C, is heated to 400 DEG C and keeps the temperature 25min, continue to heat up
To 700 DEG C and 50min is kept the temperature, be continuously heating to 1000 DEG C and is cooled down after keeping the temperature 50min by hardening media of liquid nitrogen；
(5) it is tempered under vacuum when die blank temperature drops to 80 DEG C, is slowly heated to 550 DEG C and keeps the temperature
Slow cooling after 50min；
(6) die blank surface is subjected to Nitrizing Treatment, heating mold to 245 DEG C and keeps the temperature 2h, continues to be heated to 555 DEG C
And 6h is kept the temperature, make nitriding complete, continue logical ammonia, while mold is made to come out of the stove after being quickly cooled to 200 DEG C with air blower；
(7) mold assembling is completed.
Embodiment 3
A kind of anti-deformation process control method for preparing die casting of the present embodiment, include the following steps：
(1) it is mold materials to choose P20 pre-hardening plastic die steel according to mold stress size, completes die blank system
It makes；
(2) die blank is put into vacuum quencher, is heated to 500 DEG C and keeps the temperature 20min, be continuously heating to 800 DEG C simultaneously
40min is kept the temperature, 1100 DEG C is continuously heating to and is cooled down after keeping the temperature 40min by hardening media of liquid nitrogen；
(3) it is tempered under vacuum when die blank temperature drops to 60 DEG C, is slowly heated to 700 DEG C and keeps the temperature
Slow cooling after 40min；
(4) secondary quenchings are carried out when die blank temperature drops to 60 DEG C, is heated to 450 DEG C and keeps the temperature 20min, continue to heat up
To 750 DEG C and 40min is kept the temperature, be continuously heating to 1050 DEG C and is cooled down after keeping the temperature 40min by hardening media of liquid nitrogen；
(5) it is tempered under vacuum when die blank temperature drops to 60 DEG C, is slowly heated to 600 DEG C and keeps the temperature
Slow cooling after 40min；
(6) die blank surface is subjected to Nitrizing Treatment, heating mold to 245 DEG C and keeps the temperature 2h, continues to be heated to 555 DEG C
And 6h is kept the temperature, make nitriding complete, continue logical ammonia, while mold is made to come out of the stove after being quickly cooled to 200 DEG C with air blower；
(7) mold assembling is completed.
Reference examples 1
A kind of process for preparing die casting of this reference examples, includes the following steps：
(1) it is mold materials to choose P20 pre-hardening plastic die steel according to mold stress size, completes die blank system
It makes；
(2) die blank is put into vacuum quencher, is heated to 500 DEG C and keeps the temperature 30min, be continuously heating to 800 DEG C simultaneously
60min is kept the temperature, 1000 DEG C is continuously heating to and is cooled down after keeping the temperature 60min by hardening media of liquid nitrogen；
(3) it is tempered under vacuum when die blank temperature drops to 100 DEG C, is slowly heated to 600 DEG C and keeps the temperature
Slow cooling after 60min；
(4) die blank surface is subjected to Nitrizing Treatment, heating die blank to 245 DEG C and keeps the temperature 2h, continues to be heated to
555 DEG C and 6h is kept the temperature, make nitriding complete, continue logical ammonia, while die blank is made to go out after being quickly cooled to 200 DEG C with air blower
Stove；
(5) mold assembling is completed.
Die casting mechanics property analysis
Hardness, impact flexibility inspection are carried out to die casting prepared by embodiment 1, embodiment 2, embodiment 3 and reference examples 1
It surveys.
Hardness detection method is using Rockwell apparatus, tests HRC Rockwell hardness numbers.
Method for detecting impact toughness uses shock machine, and impact specimen uses national standard GB/T229-2007 standard impulse formulas
Sample, size 55 × 55 × 10, indentations bottom height 8mm.
Testing result is as follows：
| Material number | Hardness | Impact flexibility |
| Embodiment 1 | 51HRC | 118J·cm2 |
| Embodiment 2 | 53HRC | 123J·cm2 |
| Embodiment 3 | 50HRC | 115J·cm2 |
| Reference examples 1 | 45HRC | 41J·cm2 |
A kind of anti-deformation process controlling party for preparing die casting using the present invention it can be seen from more than testing result
Die casting prepared by method, hardness and impact flexibility are all significantly improved, especially impact flexibility, improve 3 times of left sides
The right side has good prevention mold and is transformed into softer or mecystasis ability, die casting can be ensured in long-term work
Still keep form and dimensional precision constant under environment.
The foregoing description of the disclosed embodiments enables professional and technical personnel in the field to realize or use the present invention.
A variety of modifications of these embodiments will be apparent for those skilled in the art, it is as defined herein
General Principle can be realized in other embodiments without departing from the spirit or scope of the present invention.Therefore, it is of the invention
The embodiments shown herein is not intended to be limited to, and is to fit to and the principles and novel features disclosed herein phase one
The most wide range caused.
Claims (3)
1. a kind of anti-deformation process control method for preparing die casting, which is characterized in that include the following steps：
(1) it is mold materials to choose P20 pre-hardening plastic die steel according to mold stress size, completes die blank manufacture；
(2) die blank is put into vacuum quencher, is heated to 400 DEG C~500 DEG C and keeps the temperature 20min~30min, continue to heat up
To 700 DEG C~800 DEG C and 40min~60min is kept the temperature, after being continuously heating to 1000 DEG C~1100 DEG C and keeping the temperature 40min~60min
It is cooled down by hardening media of liquid nitrogen；
(3) it is tempered under vacuum when die blank temperature drops to less than 100 DEG C, is slowly heated to 600 DEG C~700 DEG C
And keep the temperature Slow cooling after 40min~60min；
(4) secondary quenchings are carried out when die blank temperature drops to less than 100 DEG C, is heated to 350 DEG C~450 DEG C and keeps the temperature 20min
~30min is continuously heating to 650 DEG C~750 DEG C and keeps the temperature 40min~60min, is continuously heating to 950 DEG C~1050 DEG C and protects
It is cooled down after warm 40min~60min by hardening media of liquid nitrogen；
(5)) it is tempered under vacuum when die blank temperature drops to less than 100 DEG C, is slowly heated to 500 DEG C~600
DEG C and keep the temperature Slow cooling after 40min~60min；
(6) die blank surface is subjected to Nitrizing Treatment, heating mold to 245 DEG C and keeps the temperature 2h, continues to be heated to 555 DEG C and protect
Warm 6h makes nitriding complete, continues logical ammonia, while mold is made to come out of the stove after being quickly cooled to 200 DEG C with air blower；
(7) mold assembling is completed.
2. a kind of anti-deformation process control method for preparing die casting according to claim 1, which is characterized in that described
Step (2) is that die blank is put into vacuum quencher, is heated to 450 DEG C and keeps the temperature 25min, is continuously heating to 750 DEG C and protects
Warm 50min is continuously heating to 1050 DEG C and is cooled down after keeping the temperature 50min by hardening media of liquid nitrogen.
3. a kind of anti-deformation process control method for preparing die casting according to claim 1, which is characterized in that described
Step (4) is to carry out secondary quenchings when die blank temperature drops to 80 DEG C, is heated to 400 DEG C and keeps the temperature 25min, is continuously heating to
700 DEG C and 50min is kept the temperature, be continuously heating to 1000 DEG C and is cooled down after keeping the temperature 50min by hardening media of liquid nitrogen.
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| CN201810086788.0A CN108251625A (en) | 2018-01-30 | 2018-01-30 | A kind of anti-deformation process control method for preparing die casting |
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| CN201810086788.0A CN108251625A (en) | 2018-01-30 | 2018-01-30 | A kind of anti-deformation process control method for preparing die casting |
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| CN109128734A (en) * | 2018-10-15 | 2019-01-04 | 苏州金瑞阳模具有限公司 | A kind of processing method of OEM aluminum-alloy wheel casting mould bed die |
| CN110205580A (en) * | 2019-06-21 | 2019-09-06 | 宁波合力模具科技股份有限公司 | A kind of gas nitriding process of Automobile Plate hot-forming die |
| CN113373283A (en) * | 2021-03-22 | 2021-09-10 | 浙江智造热成型科技有限公司 | Method for manufacturing substrate in lifting device |
| CN113913834A (en) * | 2021-10-25 | 2022-01-11 | 杭州汉派模具科技有限公司 | Ring die composite hardening process |
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Cited By (4)
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| CN109128734A (en) * | 2018-10-15 | 2019-01-04 | 苏州金瑞阳模具有限公司 | A kind of processing method of OEM aluminum-alloy wheel casting mould bed die |
| CN110205580A (en) * | 2019-06-21 | 2019-09-06 | 宁波合力模具科技股份有限公司 | A kind of gas nitriding process of Automobile Plate hot-forming die |
| CN113373283A (en) * | 2021-03-22 | 2021-09-10 | 浙江智造热成型科技有限公司 | Method for manufacturing substrate in lifting device |
| CN113913834A (en) * | 2021-10-25 | 2022-01-11 | 杭州汉派模具科技有限公司 | Ring die composite hardening process |
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