CN113999955A - Forging die for heat insulation piece and forming process thereof - Google Patents
Forging die for heat insulation piece and forming process thereof Download PDFInfo
- Publication number
- CN113999955A CN113999955A CN202111179256.XA CN202111179256A CN113999955A CN 113999955 A CN113999955 A CN 113999955A CN 202111179256 A CN202111179256 A CN 202111179256A CN 113999955 A CN113999955 A CN 113999955A
- Authority
- CN
- China
- Prior art keywords
- die
- forging
- annealing
- heat insulation
- electrode blank
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000005242 forging Methods 0.000 title claims abstract description 43
- 238000000034 method Methods 0.000 title claims abstract description 35
- 230000008569 process Effects 0.000 title claims abstract description 34
- 238000009413 insulation Methods 0.000 title claims abstract description 23
- 238000000137 annealing Methods 0.000 claims abstract description 34
- 238000005266 casting Methods 0.000 claims abstract description 25
- 238000003723 Smelting Methods 0.000 claims abstract description 23
- 238000010438 heat treatment Methods 0.000 claims abstract description 21
- 238000001816 cooling Methods 0.000 claims abstract description 20
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 11
- 238000009792 diffusion process Methods 0.000 claims abstract description 6
- 238000000265 homogenisation Methods 0.000 claims abstract description 6
- 238000004321 preservation Methods 0.000 claims abstract description 6
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 claims description 50
- 229910052786 argon Inorganic materials 0.000 claims description 25
- 238000002844 melting Methods 0.000 claims description 14
- 230000008018 melting Effects 0.000 claims description 14
- 229910000831 Steel Inorganic materials 0.000 claims description 13
- 239000010959 steel Substances 0.000 claims description 13
- 229910052782 aluminium Inorganic materials 0.000 claims description 10
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 10
- WUKWITHWXAAZEY-UHFFFAOYSA-L calcium difluoride Chemical compound [F-].[F-].[Ca+2] WUKWITHWXAAZEY-UHFFFAOYSA-L 0.000 claims description 10
- 239000000956 alloy Substances 0.000 claims description 9
- 238000007664 blowing Methods 0.000 claims description 9
- 238000010079 rubber tapping Methods 0.000 claims description 9
- 239000002893 slag Substances 0.000 claims description 6
- 235000008733 Citrus aurantifolia Nutrition 0.000 claims description 5
- 229910000519 Ferrosilicon Inorganic materials 0.000 claims description 5
- 229910000805 Pig iron Inorganic materials 0.000 claims description 5
- 235000011941 Tilia x europaea Nutrition 0.000 claims description 5
- 239000010425 asbestos Substances 0.000 claims description 5
- 229910001634 calcium fluoride Inorganic materials 0.000 claims description 5
- 239000004744 fabric Substances 0.000 claims description 5
- 239000010436 fluorite Substances 0.000 claims description 5
- 239000004571 lime Substances 0.000 claims description 5
- 230000001590 oxidative effect Effects 0.000 claims description 5
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 claims description 5
- 238000005498 polishing Methods 0.000 claims description 5
- 229910052895 riebeckite Inorganic materials 0.000 claims description 5
- 229910045601 alloy Inorganic materials 0.000 claims description 4
- 239000011810 insulating material Substances 0.000 claims description 3
- 239000012212 insulator Substances 0.000 claims description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 3
- 238000002156 mixing Methods 0.000 claims description 3
- 238000000465 moulding Methods 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 2
- 229910000756 V alloy Inorganic materials 0.000 abstract 1
- 239000000463 material Substances 0.000 description 5
- 238000003825 pressing Methods 0.000 description 3
- 238000007599 discharging Methods 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 229910052804 chromium Inorganic materials 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 150000001247 metal acetylides Chemical class 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229910052750 molybdenum Inorganic materials 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 238000010791 quenching Methods 0.000 description 1
- 230000000171 quenching effect Effects 0.000 description 1
- 238000005204 segregation Methods 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
- B21J13/00—Details of machines for forging, pressing, or hammering
- B21J13/02—Dies or mountings therefor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
- B21J5/00—Methods for forging, hammering, or pressing; Special equipment or accessories therefor
- B21J5/06—Methods for forging, hammering, or pressing; Special equipment or accessories therefor for performing particular operations
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
- B23P15/24—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass dies
-
- 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
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/26—Methods of annealing
- C21D1/32—Soft annealing, e.g. spheroidising
-
- 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
- C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
- C21D8/005—Modifying the physical properties by deformation combined with, or followed by, heat treatment of ferrous alloys
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B9/00—General processes of refining or remelting of metals; Apparatus for electroslag or arc remelting of metals
- C22B9/16—Remelting metals
- C22B9/18—Electroslag remelting
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/20—Ferrous alloys, e.g. steel alloys containing chromium with copper
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/22—Ferrous alloys, e.g. steel alloys containing chromium with molybdenum or tungsten
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/24—Ferrous alloys, e.g. steel alloys containing chromium with vanadium
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/42—Ferrous alloys, e.g. steel alloys containing chromium with nickel with copper
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/44—Ferrous alloys, e.g. steel alloys containing chromium with nickel with molybdenum or tungsten
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/46—Ferrous alloys, e.g. steel alloys containing chromium with nickel with vanadium
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Manufacturing & Machinery (AREA)
- Forging (AREA)
Abstract
The invention relates to a forging die of a heat insulation piece, and also relates to a forming process of the forging die of the heat insulation piece, which comprises electric furnace smelting; casting an electrode blank; annealing the electrode blank: annealing the electrode blank, wherein the annealing temperature is 710-760 ℃, the heat preservation time is 1-1.5 min/mm, and the electrode blank is discharged after being cooled to 300-350 ℃; electroslag remelting; forging: heating an electroslag ingot to 1240-1280 ℃, preserving heat for 15-30 h, performing diffusion homogenization, performing upsetting, drawing, forging and cogging, performing multidirectional drawing in X, Y and Z directions to reach the size of a finished product, and performing primary water cooling until the temperature of a blank core is less than or equal to 500 ℃; and (5) performing ultra-fine treatment. According to the forging die for the heat insulation piece and the forming process of the forging die, the component design is carried out by adopting the design concept of low-Si, high-Mo and low-V alloy elements, so that the prepared product has better structural performance and mechanical property and better meets the requirement of modern production on a high-end die.
Description
Technical Field
The invention relates to the technical field of metal material processing, in particular to a forging die of a heat insulation piece and a forming process thereof.
Background
Along with the improvement of economic level of people, higher requirements on the living quality are also provided. Automobiles are an indispensable part of modern life. The demand of people on automobiles has also changed from simply meeting the daily walk replacement to pursuing more comfort. Automobile manufacturers of various large automobiles show themselves in meeting market demands, wherein the most basic promotion is to insulate heat and reduce noise, and more automobiles are additionally provided with aluminum plate heat insulation pieces. The application of automotive aluminum sheet insulation has led to some changes in automotive molds, the most notable of which is the form of automotive insulation mold swager guidance. In a traditional automobile panel mould, the guide of a material pressing device usually adopts a guide plate form. Because the automobile heat insulation part has a sharp shape, a large profile height difference and a low mold closing height. Guide plates cannot be adopted for guiding the material pressing device, and only guide columns are arranged in the material pressing device for guiding.
Among many products in the mechanical industry, the mold is a major industry supporting development, and the development of the mold industry is greatly promoted. The hot work die generally works under severe working conditions such as high temperature, thermal shock and the like, so that the hot work die steel is required to have excellent comprehensive properties. The H13 steel works at the temperature below 600 ℃, has good thermal stability and thermal fatigue resistance, and better combination of strength and toughness, but the strength and the thermal stability of the material are sharply reduced at the temperature above 600 ℃, and the original excellent performance is lost. And the H21 steel with high heat resistance has poor thermal fatigue resistance under high temperature, and the die often fails due to cracks, thereby greatly reducing the service life of the die and increasing the production cost.
In view of the above problems, it is desirable to provide a forging die for a heat insulator and a molding process thereof.
Disclosure of Invention
One object of the invention is to provide a forging die for a heat insulation piece, which comprises a left die and a right die;
a first mold cavity is arranged on the left mold, a first semicircular inlet is arranged above the first mold cavity on the left mold, and the first semicircular air blowing opening is communicated with the first mold cavity;
a second die cavity matched with the first die cavity is arranged on the right die, and the second die cavity and the first die cavity form a die cavity for forming the heat insulation piece; a second semicircular inlet is formed in the right die and located above the second die cavity, and the second semicircular air blowing opening and the first semicircular air blowing opening form a circular inlet;
the forging die comprises, by mass, 0.35-0.40% of C, 0.40-0.60% of Mn, 0.10-0.30% of Si, less than or equal to 0.003% of S, less than or equal to 0.010% of P, 4.75-5.50% of Cr4, 1.75-1.95% of Mo1, 0.40-0.65% of V, less than or equal to 0.20% of Ni, less than or equal to 0.20% of Cu, and the balance of Fe.
Another object of the present invention is to provide a process for forming a forging die for a heat insulator, comprising the steps of,
s1, smelting in an electric furnace:
mixing pig iron and alloy materials according to the component content of hot-work die steel, melting and smelting in an electric furnace, oxidizing and slagging off molten steel at the temperature of more than or equal to 1650 ℃, adding ferrosilicon alloy, lime and fluorite after slagging off, adding aluminum at the tapping temperature of more than or equal to 1260 ℃, and deoxidizing by adding 1kg/t of aluminum in the tapping process;
s2, casting an electrode blank;
s3, annealing of the electrode blank:
annealing the electrode blank, wherein the annealing temperature is 710-760 ℃, the heat preservation time is 1-1.5 min/mm, and the electrode blank is discharged after being cooled to 300-350 ℃;
s4, electroslag remelting;
s5, forging:
heating an electroslag ingot to 1240-1280 ℃, preserving heat for 15-30 h, performing diffusion homogenization, performing upsetting, drawing, forging and cogging, performing multidirectional drawing in X, Y and Z directions to reach the size of a finished product, and performing primary water cooling until the temperature of a blank core is less than or equal to 500 ℃;
and S6, performing superfine treatment.
Specifically, the specific process in step S2 is: preheating an ingot mould to 40-60 ℃, then filling argon into the ingot mould, wherein the argon filling time of each ingot mould is 3-5 min, then removing an argon pipe, covering the ingot mould with a cover, and then casting, wherein an argon protection casting piece added with asbestos cloth is adopted for protection in the whole casting process, and the argon protection flow is 15-26 m3And h, casting for 4-8 min, wherein the diameter of the electrode blank is 400-908 mm, and demolding after 3-5 h.
Specifically, the specific process in step S4 is: and (3) polishing the surface, smelting by adopting a calcium fluoride and aluminum oxide binary slag system, wherein the starting point melting speed value of the stable stage of electroslag smelting is 7-10 kg/min, and the end point melting speed value is 5.0-8.0 kg/min to obtain an electroslag ingot, and then, performing power-off furnace cooling for 80-100 min and then performing a forging process. .
Specifically, the specific process of step S6 is: and (3) placing the workpiece into a heating furnace, heating to 1040-1100 ℃ along with the furnace, preserving heat, and cooling by adopting a direct water cooling mode.
Specifically, the step S6 is followed by S7, spheroidizing annealing: and (3) placing the workpiece into an annealing furnace, heating to 830-860 ℃, preserving heat for 15-30 hours, and carrying out spheroidizing annealing.
Compared with the prior art, the forging die for the heat insulation piece and the forming process thereof have the following advantages that:
(1) the product has uniform annealing microstructure, better spheroidized structure and fine and uniform grain distribution, uniform quenching structure, dispersion strengthening effect of fine precipitated phases of Mo and Cr carbides in the using process, improved material performance and high toughness and isotropy. The product can be widely used for forging dies of heat insulation pieces;
(2) the purity of the electroslag ingot is ensured through the protective atmosphere smelting, the proper constant melting speed control, the reasonable pre-melted slag selection and the electrode blank smelting sequence, the crystalline structure and the composition segregation are further improved, and particularly the control and the compactness of the liquated carbide are improved.
Drawings
Fig. 1 is a schematic structural view of a forging die for a heat insulating material according to this embodiment.
Detailed Description
The invention is further described below with reference to the following figures and specific examples.
A forging die for a heat insulation piece and a forming process thereof comprise a left die and a right die;
a first mold cavity is arranged on the left mold, a first semicircular inlet is arranged above the first mold cavity on the left mold, and the first semicircular air blowing opening is communicated with the first mold cavity;
a second die cavity matched with the first die cavity is arranged on the right die, and the second die cavity and the first die cavity form a die cavity for forming the heat insulation piece; a second semicircular inlet is formed in the right die and located above the second die cavity, and the second semicircular air blowing opening and the first semicircular air blowing opening form a circular inlet;
the forging die comprises, by mass, 0.35-0.40% of C, 0.40-0.60% of Mn, 0.10-0.30% of Si, less than or equal to 0.003% of S, less than or equal to 0.010% of P, 4.75-5.50% of Cr4, 1.75-1.95% of Mo1, 0.40-0.65% of V, less than or equal to 0.20% of Ni, less than or equal to 0.20% of Cu, and the balance of Fe.
Example 1
A forming process of a forging die of a heat insulation piece comprises the following steps,
s1, smelting in an electric furnace:
the method comprises the following steps of proportioning pig iron and alloy materials according to the component content of hot-work die steel, smelting in an electric furnace, oxidizing and slagging off molten steel at 1650 ℃, adding ferrosilicon alloy, lime and fluorite after slagging off, tapping at 1260 ℃, and adding 1kg/t of aluminum for deoxidation in the tapping process;
s2, casting an electrode blank: preheating an ingot mold to 40 ℃, then introducing argon into the ingot mold, wherein the argon introducing time of each ingot mold is 3min, then removing an argon pipe, covering the ingot mold with a cover, and then casting, wherein an argon protection casting piece with asbestos cloth is adopted for protection in the whole casting process, and the argon protection flow is 15m3H, casting time is 4min, the diameter of the electrode blank is 400mm, and demoulding is carried out after 3 h;
s3, annealing of the electrode blank:
annealing the electrode blank at the annealing temperature of 710 ℃ for 1min/mm, cooling the electrode blank to 300 ℃ in a furnace, and discharging the electrode blank;
s4, electroslag remelting: polishing the surface, smelting by adopting a calcium fluoride and aluminum oxide binary slag system, obtaining an electroslag ingot with a starting point melting rate value of 7kg/min and an end point melting rate value of 5.0kg/min in an electroslag smelting steady-state stage, and then sending the electroslag ingot to a forging process after the furnace is cooled for 80 min;
s5, forging:
heating an electroslag ingot to 1240 ℃, preserving heat for 15h for diffusion homogenization, then forging and cogging through upsetting, drawing out, carrying out multidirectional drawing in X, Y and Z directions to reach the size of a finished product, and then carrying out water cooling once until the temperature of a blank core is less than or equal to 500 ℃;
s6, ultra-fining treatment: putting the workpiece into a heating furnace, heating to 1040 ℃ along with the furnace, and cooling by adopting a direct water cooling mode after heat preservation;
s7, spheroidizing annealing: and (3) placing the workpiece into an annealing furnace, heating to 830 ℃, preserving heat for 15h, and carrying out spheroidizing annealing.
Example 2
A forming process of a forging die of a heat insulation piece comprises the following steps,
s1, smelting in an electric furnace:
proportioning pig iron and alloy materials according to the component content of hot-work die steel, smelting in an electric furnace, oxidizing and slagging off molten steel at 1700 ℃, adding ferrosilicon, lime and fluorite after slagging off, and deoxidizing by adding 1kg/t of aluminum at 1300 ℃ in the tapping process;
s2, casting an electrode blank: preheating an ingot mold to 50 ℃, then introducing argon into the ingot mold, wherein the argon introducing time of each ingot mold is 4min, then removing an argon pipe, covering the ingot mold with a cover, and then casting, wherein the whole casting process adopts argon protection casting pieces added with asbestos cloth for protection, and the argon protection flow is 20m3H, casting time is 6min, the diameter of the electrode blank is 650mm, and demoulding is carried out after 4 h;
s3, annealing of the electrode blank:
annealing the electrode blank at the annealing temperature of 730 ℃ for 1.2min/mm, cooling the electrode blank to 325 ℃, and discharging the electrode blank;
s4, electroslag remelting: polishing the surface, smelting by adopting a calcium fluoride and aluminum oxide binary slag system, obtaining an electroslag ingot by using a starting point melting rate value of 8kg/min and an end point melting rate value of 7kg/min in an electroslag smelting steady-state stage, and then sending the electroslag ingot to a forging process after the furnace is cooled for 90 min;
s5, forging:
heating an electroslag ingot to 1260 ℃, preserving heat for 24 hours for diffusion homogenization, then forging and cogging through upsetting, drawing out, carrying out multidirectional drawing out in X, Y and Z directions to reach the size of a finished product, and then carrying out water cooling once until the temperature of a blank core part is less than or equal to 500 ℃;
s6, ultra-fining treatment: putting the workpiece into a heating furnace, heating to 1070 ℃ along with the furnace, preserving heat, and cooling by adopting a direct water cooling mode;
s7, spheroidizing annealing: and (3) placing the workpiece into an annealing furnace, heating to 840 ℃, preserving heat for 24 hours, and carrying out spheroidizing annealing.
Example 3
A forming process of a forging die of a heat insulation piece comprises the following steps,
s1, smelting in an electric furnace:
mixing pig iron and alloy materials according to the component content of hot-work die steel, melting and smelting in an electric furnace, oxidizing and slagging off molten steel at the temperature of more than or equal to 1650 ℃, adding ferrosilicon alloy, lime and fluorite after slagging off, adding aluminum at the tapping temperature of more than or equal to 1260 ℃, and deoxidizing by adding 1kg/t of aluminum in the tapping process;
s2, casting an electrode blank: preheating ingot mould at 60 deg.CThen argon is filled into the ingot mold, the argon filling time of each ingot mold is 5min, then an argon pipe is removed, the ingot mold is covered by a cover and then is cast, the whole casting process is protected by argon protection casting pieces added with asbestos cloth, and the argon protection flow is 26m3H, the casting time is 8min, the diameter of the electrode blank is 908mm, and demoulding is carried out after 5 h;
s3, annealing of the electrode blank:
annealing the electrode blank, wherein the annealing temperature is 710-760 ℃, the heat preservation time is 1-1.5 min/mm, and the electrode blank is discharged after being cooled to 300-350 ℃;
s4, electroslag remelting: polishing the surface, smelting by adopting a calcium fluoride and aluminum oxide binary slag system, obtaining an electroslag ingot by using a starting point melting speed value of 7-10 kg/min and an end point melting speed value of 5.0-8.0 kg/min in an electroslag smelting steady-state stage, and then sending the electroslag ingot to a forging process after the furnace is cooled for 80-100 min in a power failure mode;
s5, forging:
heating an electroslag ingot to 1240-1280 ℃, preserving heat for 15-30 h, performing diffusion homogenization, performing upsetting, drawing, forging and cogging, performing multidirectional drawing in X, Y and Z directions to reach the size of a finished product, and performing primary water cooling until the temperature of a blank core is less than or equal to 500 ℃;
s6, ultra-fining treatment: placing the workpiece into a heating furnace, heating to 1040-1100 ℃ along with the furnace, and cooling by adopting a direct water cooling mode after heat preservation;
s7, spheroidizing annealing: and (3) placing the workpiece into an annealing furnace, heating to 830-860 ℃, preserving heat for 15-30 hours, and carrying out spheroidizing annealing.
Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.
Claims (6)
1. A forging die for a heat insulation piece is characterized by comprising a left die and a right die;
a first mold cavity is arranged on the left mold, a first semicircular inlet is arranged above the first mold cavity on the left mold, and the first semicircular air blowing opening is communicated with the first mold cavity;
a second die cavity matched with the first die cavity is arranged on the right die, and the second die cavity and the first die cavity form a die cavity for forming the heat insulation piece; a second semicircular inlet is formed in the right die and located above the second die cavity, and the second semicircular air blowing opening and the first semicircular air blowing opening form a circular inlet;
the forging die comprises, by mass, 0.35-0.40% of C, 0.40-0.60% of Mn, 0.10-0.30% of Si, less than or equal to 0.003% of S, less than or equal to 0.010% of P, 4.75-5.50% of Cr4, 1.75-1.95% of Mo1, 0.40-0.65% of V, less than or equal to 0.20% of Ni, less than or equal to 0.20% of Cu, and the balance of Fe.
2. The process for molding a forging die for a heat insulator according to claim 1, comprising the steps of,
s1, smelting in an electric furnace:
mixing pig iron and alloy materials according to the component content of hot-work die steel, melting and smelting in an electric furnace, oxidizing and slagging off molten steel at the temperature of more than or equal to 1650 ℃, adding ferrosilicon alloy, lime and fluorite after slagging off, adding aluminum at the tapping temperature of more than or equal to 1260 ℃, and deoxidizing by adding 1kg/t of aluminum in the tapping process;
s2, casting an electrode blank;
s3, annealing of the electrode blank:
annealing the electrode blank, wherein the annealing temperature is 710-760 ℃, the heat preservation time is 1-1.5 min/mm, and the electrode blank is discharged after being cooled to 300-350 ℃;
s4, electroslag remelting;
s5, forging:
heating an electroslag ingot to 1240-1280 ℃, preserving heat for 15-30 h, performing diffusion homogenization, performing upsetting, drawing, forging and cogging, performing multidirectional drawing in X, Y and Z directions to reach the size of a finished product, and performing primary water cooling until the temperature of a blank core is less than or equal to 500 ℃;
and S6, performing superfine treatment.
3. The forging die for heat insulating material according to claim 2The molding process is characterized in that the specific process in the step S2 is as follows: preheating an ingot mould to 40-60 ℃, then filling argon into the ingot mould, wherein the argon filling time of each ingot mould is 3-5 min, then removing an argon pipe, covering the ingot mould with a cover, and then casting, wherein an argon protection casting piece added with asbestos cloth is adopted for protection in the whole casting process, and the argon protection flow is 15-26 m3And h, casting for 4-8 min, wherein the diameter of the electrode blank is 400-908 mm, and demolding after 3-5 h.
4. The forming process of the forging die for the heat insulation member according to claim 2, wherein the specific process in the step S4 is as follows: and (3) polishing the surface, smelting by adopting a calcium fluoride and aluminum oxide binary slag system, wherein the starting point melting speed value of the stable stage of electroslag smelting is 7-10 kg/min, and the end point melting speed value is 5.0-8.0 kg/min to obtain an electroslag ingot, and then, performing power-off furnace cooling for 80-100 min and then performing a forging process.
5. The forming process of the forging die for the heat insulation member as claimed in claim 2, wherein the specific process of step S6 is as follows: and (3) placing the workpiece into a heating furnace, heating to 1040-1100 ℃ along with the furnace, preserving heat, and cooling by adopting a direct water cooling mode.
6. The forming process of a forging die for a heat insulating material as claimed in any one of claims 2 to 5, further comprising, after the step S6, S7, spheroidizing annealing: and (3) placing the workpiece into an annealing furnace, heating to 830-860 ℃, preserving heat for 15-30 hours, and carrying out spheroidizing annealing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111179256.XA CN113999955A (en) | 2021-10-10 | 2021-10-10 | Forging die for heat insulation piece and forming process thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111179256.XA CN113999955A (en) | 2021-10-10 | 2021-10-10 | Forging die for heat insulation piece and forming process thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113999955A true CN113999955A (en) | 2022-02-01 |
Family
ID=79922451
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111179256.XA Pending CN113999955A (en) | 2021-10-10 | 2021-10-10 | Forging die for heat insulation piece and forming process thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113999955A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114540699A (en) * | 2022-02-28 | 2022-05-27 | 江苏宏晟模具钢材料科技有限公司 | High-performance hot-work die steel and preparation method thereof |
| CN115637379A (en) * | 2022-09-09 | 2023-01-24 | 北京钢研高纳科技股份有限公司 | High-carbon alloy and preparation method thereof |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN208745324U (en) * | 2018-08-14 | 2019-04-16 | 佛山市顺德区高洁丽塑料包装有限公司 | A kind of fortune water-bound of rectangular bottle blow mold |
| CN111593257A (en) * | 2019-09-07 | 2020-08-28 | 江苏宏晟模具钢材料科技有限公司 | High-toughness and high-thermal-stability hot-work die steel and preparation method thereof |
| CN211938880U (en) * | 2019-12-31 | 2020-11-17 | 上海新闵重型锻造有限公司 | Twelve-way pipe fitting forming die |
| CN112743803A (en) * | 2020-12-14 | 2021-05-04 | 武汉林溯科技有限公司 | Blowing mould capable of replacing compressed gas for blowing |
-
2021
- 2021-10-10 CN CN202111179256.XA patent/CN113999955A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN208745324U (en) * | 2018-08-14 | 2019-04-16 | 佛山市顺德区高洁丽塑料包装有限公司 | A kind of fortune water-bound of rectangular bottle blow mold |
| CN111593257A (en) * | 2019-09-07 | 2020-08-28 | 江苏宏晟模具钢材料科技有限公司 | High-toughness and high-thermal-stability hot-work die steel and preparation method thereof |
| CN211938880U (en) * | 2019-12-31 | 2020-11-17 | 上海新闵重型锻造有限公司 | Twelve-way pipe fitting forming die |
| CN112743803A (en) * | 2020-12-14 | 2021-05-04 | 武汉林溯科技有限公司 | Blowing mould capable of replacing compressed gas for blowing |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114540699A (en) * | 2022-02-28 | 2022-05-27 | 江苏宏晟模具钢材料科技有限公司 | High-performance hot-work die steel and preparation method thereof |
| CN114540699B (en) * | 2022-02-28 | 2022-12-13 | 江苏宏晟模具钢材料科技有限公司 | High-performance hot-work die steel and preparation method thereof |
| CN115637379A (en) * | 2022-09-09 | 2023-01-24 | 北京钢研高纳科技股份有限公司 | High-carbon alloy and preparation method thereof |
| CN115637379B (en) * | 2022-09-09 | 2024-04-09 | 北京钢研高纳科技股份有限公司 | High-carbon alloy and preparation method thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN111593257B (en) | High-toughness and high-thermal-stability hot-work die steel and preparation method thereof | |
| CN106947908B (en) | A kind of method of continuous casting electroslag production 4Cr5MoSiV1 die steels | |
| CN103014534B (en) | Cast hot work die steel and processing method thereof | |
| CN110295332B (en) | High-toughness high-mirror-surface pre-hardened die steel and manufacturing process thereof | |
| CN109266970B (en) | High-nitrogen high-chromium plastic die steel and smelting and heat treatment method thereof | |
| CN103014495B (en) | High-tenacity high-wear-resistance cold-work die steel and processing method thereof | |
| CN105063512A (en) | Plastic die steel and manufacturing method thereof | |
| CN103014511B (en) | High-toughness cold-work mould steel and complete processing thereof | |
| CN113999955A (en) | Forging die for heat insulation piece and forming process thereof | |
| CN112359283B (en) | Manufacturing process of super-grade high-quality die-casting die steel forging module | |
| CN107058897A (en) | A kind of high manganese pre-hardening plastic steel plate for die and its production method | |
| CN102433515A (en) | MC5 Steel and large-sized flattening roll prepared by using the same, and manufacturing process of MC5 steel | |
| CN114540699B (en) | High-performance hot-work die steel and preparation method thereof | |
| CN114000052A (en) | Steel P92 die casting round ingot for high-pressure boiler pipe and smelting process thereof | |
| CN114438394B (en) | Production process of pre-hardened high-polishing plastic mold steel | |
| CN107779775A (en) | H13 high speeds precision forging die steel and steel ingot production method | |
| CN112501382B (en) | Preparation method of carbon tool steel for obtaining low-net-shaped carbide | |
| CN105369139B (en) | The rollcogging-roll and its manufacture method of a kind of specific alloy half steel material | |
| CN108950134B (en) | Remelting method of electroslag ingot for cold roll | |
| CN110885947A (en) | High-performance high-toughness hot-work die steel and preparation method thereof | |
| CN107916375A (en) | Founding materials and its casting technique for casting wear-resistant centrifugal cylinder | |
| CN107828992A (en) | A kind of preparation method of the aluminium alloy wheel hub of low scrappage | |
| CN101096724B (en) | Electromagnetic steel having excellent electromagnetic property and method for manufacturing same | |
| CN109797348B (en) | Production process of high-strength plate spring | |
| CN111187968A (en) | Preparation method of 1.2367 hot-working extrusion die steel |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20220201 |