CN115505844A - Die forging and soft nitriding method for mine car wheel - Google Patents
Die forging and soft nitriding method for mine car wheel Download PDFInfo
- Publication number
- CN115505844A CN115505844A CN202211158413.3A CN202211158413A CN115505844A CN 115505844 A CN115505844 A CN 115505844A CN 202211158413 A CN202211158413 A CN 202211158413A CN 115505844 A CN115505844 A CN 115505844A
- Authority
- CN
- China
- Prior art keywords
- die forging
- furnace
- die
- forging
- mine car
- 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.)
- Granted
Links
- 238000005242 forging Methods 0.000 title claims abstract description 87
- 238000005121 nitriding Methods 0.000 title claims abstract description 63
- 238000000034 method Methods 0.000 title claims abstract description 29
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims abstract description 45
- 238000005496 tempering Methods 0.000 claims abstract description 31
- 229910052757 nitrogen Inorganic materials 0.000 claims abstract description 25
- 238000010438 heat treatment Methods 0.000 claims abstract description 24
- 239000000047 product Substances 0.000 claims abstract description 24
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 20
- 239000010959 steel Substances 0.000 claims abstract description 20
- 239000011265 semifinished product Substances 0.000 claims abstract description 12
- 238000010791 quenching Methods 0.000 claims abstract description 7
- 230000000171 quenching effect Effects 0.000 claims abstract description 7
- 238000001816 cooling Methods 0.000 claims abstract description 6
- 238000007599 discharging Methods 0.000 claims abstract description 6
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 20
- 238000000137 annealing Methods 0.000 claims description 10
- 238000004321 preservation Methods 0.000 claims description 10
- 230000008569 process Effects 0.000 claims description 8
- 239000007789 gas Substances 0.000 claims description 6
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 claims description 5
- 229910001873 dinitrogen Inorganic materials 0.000 claims description 5
- 239000012535 impurity Substances 0.000 claims description 5
- 229910052698 phosphorus Inorganic materials 0.000 claims description 5
- 230000001681 protective effect Effects 0.000 claims description 5
- 239000000463 material Substances 0.000 claims description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 5
- 230000009471 action Effects 0.000 description 4
- 230000015572 biosynthetic process Effects 0.000 description 4
- 150000001247 metal acetylides Chemical class 0.000 description 4
- 125000004433 nitrogen atom Chemical group N* 0.000 description 4
- 229910052799 carbon Inorganic materials 0.000 description 3
- 238000005266 casting Methods 0.000 description 3
- ZHNUHDYFZUAESO-UHFFFAOYSA-N Formamide Chemical compound NC=O ZHNUHDYFZUAESO-UHFFFAOYSA-N 0.000 description 2
- 125000004432 carbon atom Chemical group C* 0.000 description 2
- 238000005256 carbonitriding Methods 0.000 description 2
- 229910052500 inorganic mineral Inorganic materials 0.000 description 2
- 239000010410 layer Substances 0.000 description 2
- 239000011707 mineral Substances 0.000 description 2
- GSEJCLTVZPLZKY-UHFFFAOYSA-N Triethanolamine Chemical compound OCCN(CCO)CCO GSEJCLTVZPLZKY-UHFFFAOYSA-N 0.000 description 1
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000004202 carbamide Substances 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 230000003137 locomotive effect Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000005058 metal casting Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- -1 ores Substances 0.000 description 1
- 239000012466 permeate Substances 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000002344 surface layer Substances 0.000 description 1
- 238000005979 thermal decomposition reaction Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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
- C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
-
- 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
- B21J5/02—Die forging; Trimming by making use of special dies ; Punching during forging
-
- 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
-
- 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
- C21D9/34—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for tyres; for rims
-
- 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
- C22C38/001—Ferrous alloys, e.g. steel alloys containing N
-
- 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
-
- 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
- C22C38/06—Ferrous alloys, e.g. steel alloys containing aluminium
-
- 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
- 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
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
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)
- Chemical Kinetics & Catalysis (AREA)
- Solid-Phase Diffusion Into Metallic Material Surfaces (AREA)
- Heat Treatment Of Articles (AREA)
Abstract
The invention discloses a die forging and soft nitriding method for a mine car wheel, which specifically comprises the following steps: (1) Placing the steel for the soft nitriding treatment in a heating furnace for forging, forging the steel into a die forging blank, and removing oxide skin on the surface of the die forging blank; (2) Preheating a die forging die, transferring a die forging blank with surface oxide skin removed into a forging press, and performing die forging through the die forging die; (3) After the blank is taken out of the die forging die, the blank is subjected to tempering treatment in a heat treatment furnace and is quenched and tempered to obtain a semi-finished product of the mine car wheel; (4) Placing the semi-finished product of the mine car wheel after quenching and tempering in a nitriding furnace for soft nitriding; (5) Filling nitrogen into the furnace, cooling to below 280 ℃, opening a furnace door, and discharging the product out of the furnace; (6) And removing burrs of the discharged product to obtain a finished product of the mine car wheel. The invention relates to the technical field of processing of mine car wheels, and particularly provides a die forging and soft nitriding method for a mine car wheel.
Description
Technical Field
The invention relates to the technical field of processing of mine car wheels, in particular to a die forging and soft nitriding method for a mine car wheel.
Background
The mine car is a standard or narrow-gauge railway conveying vehicle for conveying bulk materials such as ores, waste rocks and coal in mines and is generally pulled by a locomotive or a winch. The mine car is mainly used for track transportation of underground roadways, shafts and the ground of mines. Mine car wheels are important components of mine cars, which have higher requirements for strength and durability.
The existing mine wheel is mainly produced by adopting a casting mode, and then is subjected to heat treatment after casting processing. Although the mineral vehicle wheel produced by casting has the advantages of low cost and the like, the problems of insufficient strength and durability of the product exist at the same time, the quality problems of air holes, sand holes and the like are inevitably generated in the metal casting process, the density of the cast product is low, the existing mineral vehicle wheel is insufficient in strength and durability, the damage and the replacement are frequent, and even safety accidents are caused.
Nitrocarburizing is also known as nitrocarburizing or ferritic nitrocarburizing. Is a chemical surface heat treatment process for simultaneously permeating nitrogen and carbon atoms into the surface of a steel piece under the action of high temperature. In order to shorten the nitriding period and to make the nitriding process not limited by steel grade, the soft nitriding process was developed on the basis of the low-temperature nitriding process in the last twenty years. The soft nitriding is substantially low-temperature carbonitriding mainly involving nitriding, and steel is not only permeated with nitrogen atoms but also with a small amount of carbon atoms, and the treatment results are called soft nitriding because the hardness of the carburized layer is lower and the brittleness is smaller than that of the aforementioned general gaseous nitrogen.
Gas soft nitriding, which is one of the soft nitriding methods, is low-temperature nitrogen and carbon co-cementation in an atmosphere containing carbon and nitrogen atoms, and common co-cementation media include urea, formamide and triethanolamine, which undergo a thermal decomposition reaction at a soft nitriding temperature to produce activated carbon and nitrogen atoms. The active carbon and nitrogen atoms are absorbed by the surface of the workpiece and permeate into the surface layer of the workpiece through diffusion, so that a carbonitriding layer mainly containing nitrogen is obtained.
Disclosure of Invention
Aiming at the situation, in order to make up for the existing defects, the invention provides a die forging and soft nitriding method for a mine car wheel, which effectively solves the technical problems of improving the strength and durability of the product by combining a novel die forging processing mode and soft nitriding.
The invention provides the following technical scheme: the invention relates to a die forging and tufftriding method for a mine car wheel, which specifically comprises the following steps:
(1) Placing the steel for the soft nitriding treatment in a heating furnace for forging, forging the steel into a die forging blank, and removing oxide skin on the surface of the die forging blank;
(2) Preheating a die forging die, transferring a die forging blank with surface oxide skin removed into a forging press, and performing die forging through the die forging die;
(3) After the wheel is taken out of the die forging die, tempering the wheel in a heat treatment furnace to carry out quenching and tempering to obtain a semi-finished product of the mine wheel so as to inhibit the formation of network carbides inside the wheel and eliminate internal stress, so that a good internal structure of the wheel is obtained and the toughness of the wheel is improved;
(4) Placing the semi-finished product of the mine car wheel after the quenching and tempering treatment in a nitriding furnace, vacuumizing the nitriding furnace to a vacuum degree of 22-28 pa, introducing nitrogen gas for filling protective gas, introducing an ethanol solution, keeping introducing the nitrogen until the temperature in the nitriding furnace reaches 260-350 ℃, stopping supplying the nitrogen, introducing dried ammonia gas, continuously heating the nitriding furnace, controlling the temperature of the nitriding furnace to be at the soft nitriding treatment temperature, and entering a nitriding heat preservation stage;
(5) Filling nitrogen into the furnace, cooling to below 280 ℃, opening a furnace door, and discharging the product out of the furnace;
(6) And removing burrs of the discharged product to obtain a finished product of the mine car wheel.
Further, the steel for soft nitriding in the step (1) comprises the following components: c, by mass percent: 0.25 to 035%, si:0.1 to 0.2%, mn:0.8 to 1.2%, cr:2.5 to 5.0%, N:0.03 to 0.05%, P:0.01 to 0.03%, S:0.005 to 0.015%, al:0.01 to 0.06%, V:0.05 to 0.1 percent, and the balance of Fe and inevitable impurities, wherein the sum of the mass percent of the components is 100 percent.
Further, the initial forging temperature in the heating furnace in the step (1) is 1250-1350 ℃, the annealing temperature is 1300-1400 ℃, and the annealing heat preservation time is 30-40 min.
Further, the preheating temperature of the die forging die in the step (2) is 220-260 ℃.
Further, the tempering frequency in the step (3) is 2 times, the primary tempering is 480 ℃ for 5 hours, and the secondary tempering is 500 ℃ for 6 hours.
Further, the temperature of the tufftriding treatment in the step (4) is 560-620 ℃, and the tufftriding heat preservation time is as follows: 100 to 150 minutes.
Further, the dripping speed of the ethanol solution in the step (4) is 50-100 d/min.
The invention with the structure has the following beneficial effects: according to the die forging and tufftriding method for the mine car wheel, disclosed by the invention, the die forging forming and tufftriding treatment methods are combined, so that the density, the strength and the durability of the product are effectively improved, the product is uniform inside and outside, and the performance is consistent; the product quality is stable, and the use and maintenance cost can be greatly reduced.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments; all other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1
The invention provides the following technical scheme: the invention relates to a die forging and soft nitriding method for a mine car wheel, which specifically comprises the following steps:
(1) Placing the steel for the soft nitriding treatment in a heating furnace for forging, wherein the steel is forged into a die forging blank, the initial forging temperature in the heating furnace is 1250-1350 ℃, the annealing temperature is 1300-1400 ℃, the annealing heat preservation time is 30-40 min, and oxide skin on the surface of the die forging blank is removed, and the steel for the soft nitriding treatment comprises the following components: c, by mass percent: 0.25%, si:0.1%, mn:0.8%, cr:2.5%, N:0.03%, P:0.01%, S:0.005%, al:0.01%, V:0.05 percent, and the balance of Fe and inevitable impurities, wherein the sum of the mass percent of the components is 100 percent;
(2) Preheating a die forging die, wherein the preheating temperature of the die forging die is 220-260 ℃, transferring a die forging blank with surface oxide skin removed into a forging press, and performing die forging through the die forging die;
(3) Taking the wheel out of the die forging die and then carrying out tempering treatment in a heat treatment furnace for tempering to obtain a semi-finished product of the mine wheel, wherein the technical scheme of 2 times of tempering is adopted, the primary tempering is 480 ℃ for 5 hours, and the secondary tempering is 500 ℃ for 6 hours, so that the formation of network carbides in the wheel is inhibited and the internal stress is eliminated, and the good internal structure of the wheel is obtained and the toughness of the wheel is improved;
(4) Placing the semi-finished product of the mine car wheel after the quenching and tempering treatment in a nitriding furnace, vacuumizing the nitriding furnace to a vacuum degree of 22-28 pa, introducing nitrogen gas for filling protective gas, introducing an ethanol solution, keeping the dropping speed of the ethanol solution at 50-100 d/min, introducing nitrogen until the temperature in the nitriding furnace reaches 260-350 ℃, stopping supplying nitrogen, introducing dried ammonia gas, continuously heating the nitriding furnace, controlling the temperature of the nitriding furnace to be 560-620 ℃ at the tufftride treatment temperature, and keeping the tufftride temperature for a tufftride heat preservation time: 100-150 minutes;
(5) Filling nitrogen into the furnace, cooling to below 280 ℃, opening a furnace door, and discharging the product out of the furnace;
(6) And removing burrs of the discharged product to obtain a finished product of the mine car wheel.
Example 2
The invention provides the following technical scheme: the invention relates to a die forging and soft nitriding method for a mine car wheel, which specifically comprises the following steps:
(1) Placing the steel for the soft nitriding treatment in a heating furnace for forging, wherein the steel is forged into a die forging blank, the initial forging temperature in the heating furnace is 1250-1350 ℃, the annealing temperature is 1300-1400 ℃, the annealing heat preservation time is 30-40 min, and oxide skin on the surface of the die forging blank is removed, and the steel for the soft nitriding treatment comprises the following components: c:0.3%, si:0.15%, mn:1.0%, cr:3.75%, N:0.04%, P:0.02%, S:0.01%, al:0.035%, V:0.075%, and the balance of Fe and inevitable impurities, wherein the sum of the mass percentages of the components is 100%;
(2) Preheating a die forging die, wherein the preheating temperature of the die forging die is 220-260 ℃, transferring a die forging blank with surface oxide skin removed into a forging press, and performing die forging through the die forging die;
(3) Taking the wheel out of the die forging die and then carrying out tempering treatment in a heat treatment furnace for tempering to obtain a semi-finished product of the mine wheel, wherein the technical scheme of 2 times of tempering is adopted, the primary tempering is 480 ℃ for 5 hours, and the secondary tempering is 500 ℃ for 6 hours, so that the formation of network carbides in the wheel is inhibited and the internal stress is eliminated, and the good internal structure of the wheel is obtained and the toughness of the wheel is improved;
(4) Placing the semi-finished product of the mine car wheel after the quenching and tempering treatment in a nitriding furnace, vacuumizing the nitriding furnace to a vacuum degree of 22-28 pa, introducing nitrogen gas for filling protective gas, introducing an ethanol solution, keeping the dropping speed of the ethanol solution at 50-100 d/min, introducing nitrogen until the temperature in the nitriding furnace reaches 260-350 ℃, stopping supplying nitrogen, introducing dried ammonia gas, continuously heating the nitriding furnace, controlling the temperature of the nitriding furnace to be 560-620 ℃ at the tufftride treatment temperature, and keeping the tufftride temperature for a tufftride heat preservation time: 100-150 minutes;
(5) Filling nitrogen into the furnace, cooling to below 280 ℃, opening a furnace door, and discharging the product out of the furnace;
(6) And removing burrs of the discharged product to obtain a finished product of the mine car wheel.
Example 3
The invention provides the following technical scheme: the invention relates to a die forging and soft nitriding method for a mine car wheel, which specifically comprises the following steps:
(1) Placing the steel for the soft nitriding treatment in a heating furnace for forging, wherein the steel is forged into a die forging blank, the initial forging temperature in the heating furnace is 1250-1350 ℃, the annealing temperature is 1300-1400 ℃, the annealing heat preservation time is 30-40 min, and oxide skin on the surface of the die forging blank is removed, and the steel for the soft nitriding treatment comprises the following components: c, by mass percent: 035%, si:0.2%, mn:1.2%, cr:5.0%, N:0.05%, P:0.03%, S:0.015%, al:0.06%, V:0.1 percent, and the balance of Fe and inevitable impurities, wherein the sum of the mass percent of the components is 100 percent;
(2) Preheating a die forging die, wherein the preheating temperature of the die forging die is 220-260 ℃, transferring a die forging blank with surface oxide skin removed into a forging press, and performing die forging through the die forging die;
(3) Taking the wheel out of the die forging die and then carrying out tempering treatment in a heat treatment furnace for tempering to obtain a semi-finished product of the mine wheel, wherein the technical scheme of 2 times of tempering is adopted, the primary tempering is 480 ℃ for 5 hours, and the secondary tempering is 500 ℃ for 6 hours, so that the formation of network carbides in the wheel is inhibited and the internal stress is eliminated, and the good internal structure of the wheel is obtained and the toughness of the wheel is improved;
(4) Placing the semi-finished product of the mine car wheel after the quenching and tempering treatment in a nitriding furnace, vacuumizing the nitriding furnace to a vacuum degree of 22-28 pa, introducing nitrogen gas for filling protective gas, introducing an ethanol solution, keeping the dropping speed of the ethanol solution at 50-100 d/min, introducing nitrogen until the temperature in the nitriding furnace reaches 260-350 ℃, stopping supplying nitrogen, introducing dried ammonia gas, continuously heating the nitriding furnace, controlling the temperature of the nitriding furnace to be 560-620 ℃ at the tufftride treatment temperature, and keeping the tufftride temperature for a tufftride heat preservation time: 100-150 minutes;
(5) Filling nitrogen into the furnace, cooling to below 280 ℃, opening a furnace door, and discharging the product out of the furnace;
(6) And removing burrs of the discharged product to obtain a finished product of the mine car wheel.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Furthermore, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (7)
1. The die forging and soft nitriding method for the mine car wheel is characterized by comprising the following steps:
(1) Placing the steel for the soft nitriding treatment in a heating furnace for forging, forging the steel into a die forging blank, and removing oxide skin on the surface of the die forging blank;
(2) Preheating a die forging die, transferring a die forging blank with surface oxide skin removed into a forging press, and performing die forging through the die forging die;
(3) After the blank is taken out of the die forging die, the blank is subjected to tempering treatment in a heat treatment furnace and is quenched and tempered to obtain a semi-finished product of the mine car wheel;
(4) Placing the semi-finished product of the mine car wheel after the quenching and tempering treatment in a nitriding furnace, vacuumizing the nitriding furnace to a vacuum degree of 22-28 pa, introducing nitrogen gas for filling protective gas, introducing an ethanol solution, keeping introducing the nitrogen until the temperature in the nitriding furnace reaches 260-350 ℃, stopping supplying the nitrogen, introducing dried ammonia gas, continuously heating the nitriding furnace, controlling the temperature of the nitriding furnace to be at the soft nitriding treatment temperature, and entering a nitriding heat preservation stage;
(5) Filling nitrogen into the furnace, cooling to below 280 ℃, opening a furnace door, and discharging a product out of the furnace;
(6) And removing burrs of the discharged product to obtain a finished product of the mine car wheel.
2. The die forging and tufftriding method for mine vehicle wheels as claimed in claim 1, wherein said tufftriding steel material of step (1) comprises the following components: c, by mass percent: 0.25 to 035%, si:0.1 to 0.2%, mn:0.8 to 1.2%, cr:2.5 to 5.0%, N:0.03 to 0.05%, P:0.01 to 0.03%, S:0.005 to 0.015%, al:0.01 to 0.06%, V:0.05 to 0.1 percent, and the balance of Fe and inevitable impurities, wherein the sum of the mass percent of the components is 100 percent.
3. The die forging and soft nitriding method for the mine wheel according to claim 1, wherein the initial forging temperature in the heating furnace in the step (1) is 1250-1350 ℃, the annealing temperature is 1300-1400 ℃, and the annealing holding time is 30-40 min.
4. The die forging and tufftriding method for mine car wheels as claimed in claim 1, wherein said die forging preheating temperature in step (2) is 220-260 ℃.
5. The die forging and tufftriding process for mine vehicle wheels as claimed in claim 1, wherein said tempering of step (3) is performed 2 times, wherein the first tempering is performed at 480 ℃ for 5 hours, and wherein the second tempering is performed at 500 ℃ for 6 hours.
6. The die forging and tufftriding method for mine vehicle wheels as claimed in claim 1, wherein the tufftriding temperature in step (4) is 560-620 ℃, the tufftriding holding time is as follows: 100 to 150 minutes.
7. The die forging and tufftriding method for mine vehicle wheels as claimed in claim 1, wherein the dropping speed of the ethanol solution in the step (4) is 50-100 d/min.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211158413.3A CN115505844B (en) | 2022-09-22 | 2022-09-22 | Die forging and soft nitriding method for mine car wheels |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211158413.3A CN115505844B (en) | 2022-09-22 | 2022-09-22 | Die forging and soft nitriding method for mine car wheels |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN115505844A true CN115505844A (en) | 2022-12-23 |
| CN115505844B CN115505844B (en) | 2023-06-27 |
Family
ID=84505153
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211158413.3A Active CN115505844B (en) | 2022-09-22 | 2022-09-22 | Die forging and soft nitriding method for mine car wheels |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115505844B (en) |
Citations (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1069075A (en) * | 1991-07-27 | 1993-02-17 | 重庆大学 | Strengthen nitrogenation treatment technology |
| JPH10226818A (en) * | 1996-12-11 | 1998-08-25 | Sumitomo Metal Ind Ltd | Production of steel for soft-nitriding and soft-nitrided parts using this steel |
| JPH11229032A (en) * | 1998-02-13 | 1999-08-24 | Sumitomo Metal Ind Ltd | Production of steel for soft-nitriding and soft-nitrided parts using the steel |
| JP2000160287A (en) * | 1998-11-20 | 2000-06-13 | Sumitomo Metal Ind Ltd | Nitriding non-heat treated forged parts and manufacture thereof |
| JP2007077411A (en) * | 2005-09-09 | 2007-03-29 | Daido Steel Co Ltd | Machine structural component having excellent fatigue strength and wear property, and method for producing the same |
| JP2009068057A (en) * | 2007-09-12 | 2009-04-02 | Jfe Steel Kk | Steel sheet for nitrocarburizing treatment and manufacturing method therefor |
| CN102089452A (en) * | 2009-05-15 | 2011-06-08 | 新日本制铁株式会社 | Steel for nitrocarburizing and nitrocarburized parts |
| CN102517521A (en) * | 2011-12-20 | 2012-06-27 | 莱芜钢铁集团有限公司 | MnCr carburized gear steel and its production method |
| JP2012177167A (en) * | 2011-02-28 | 2012-09-13 | Jfe Steel Corp | Steel sheet for soft nitriding treatment, and its manufacturing method |
| CN103993223A (en) * | 2014-05-06 | 2014-08-20 | 上海大学 | Ultrahigh thermal conductivity wear-resistant hot stamping die steel and manufacturing method thereof |
| CN104131248A (en) * | 2013-05-01 | 2014-11-05 | 大同特殊钢株式会社 | Nitrocarburized crankshaft and method of manufacturing the same |
| CN105414757A (en) * | 2015-12-09 | 2016-03-23 | 蒙阴金华机械有限公司 | Equipment and machining method for welding metal plates onto inner surface and outer surface of workpiece |
| CN109593921A (en) * | 2018-12-27 | 2019-04-09 | 宁波兴波机械有限公司 | The tufftride heat treatment method of mould steel |
| CN114293139A (en) * | 2021-12-07 | 2022-04-08 | 江苏聚源电气有限公司 | Low-temperature soft nitriding process |
-
2022
- 2022-09-22 CN CN202211158413.3A patent/CN115505844B/en active Active
Patent Citations (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1069075A (en) * | 1991-07-27 | 1993-02-17 | 重庆大学 | Strengthen nitrogenation treatment technology |
| JPH10226818A (en) * | 1996-12-11 | 1998-08-25 | Sumitomo Metal Ind Ltd | Production of steel for soft-nitriding and soft-nitrided parts using this steel |
| JPH11229032A (en) * | 1998-02-13 | 1999-08-24 | Sumitomo Metal Ind Ltd | Production of steel for soft-nitriding and soft-nitrided parts using the steel |
| JP2000160287A (en) * | 1998-11-20 | 2000-06-13 | Sumitomo Metal Ind Ltd | Nitriding non-heat treated forged parts and manufacture thereof |
| JP2007077411A (en) * | 2005-09-09 | 2007-03-29 | Daido Steel Co Ltd | Machine structural component having excellent fatigue strength and wear property, and method for producing the same |
| JP2009068057A (en) * | 2007-09-12 | 2009-04-02 | Jfe Steel Kk | Steel sheet for nitrocarburizing treatment and manufacturing method therefor |
| CN102089452A (en) * | 2009-05-15 | 2011-06-08 | 新日本制铁株式会社 | Steel for nitrocarburizing and nitrocarburized parts |
| JP2012177167A (en) * | 2011-02-28 | 2012-09-13 | Jfe Steel Corp | Steel sheet for soft nitriding treatment, and its manufacturing method |
| CN102517521A (en) * | 2011-12-20 | 2012-06-27 | 莱芜钢铁集团有限公司 | MnCr carburized gear steel and its production method |
| CN104131248A (en) * | 2013-05-01 | 2014-11-05 | 大同特殊钢株式会社 | Nitrocarburized crankshaft and method of manufacturing the same |
| CN103993223A (en) * | 2014-05-06 | 2014-08-20 | 上海大学 | Ultrahigh thermal conductivity wear-resistant hot stamping die steel and manufacturing method thereof |
| CN105414757A (en) * | 2015-12-09 | 2016-03-23 | 蒙阴金华机械有限公司 | Equipment and machining method for welding metal plates onto inner surface and outer surface of workpiece |
| CN109593921A (en) * | 2018-12-27 | 2019-04-09 | 宁波兴波机械有限公司 | The tufftride heat treatment method of mould steel |
| CN114293139A (en) * | 2021-12-07 | 2022-04-08 | 江苏聚源电气有限公司 | Low-temperature soft nitriding process |
Also Published As
| Publication number | Publication date |
|---|---|
| CN115505844B (en) | 2023-06-27 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107675084B (en) | High-carbon high-strength tenacity pearlite steel rail and its manufacturing method | |
| CN107475616B (en) | High-strength tenacity pearlite steel rail and its manufacturing method | |
| CN110951943B (en) | Baimamu multiphase steel rail and heat treatment method thereof | |
| CN110616374B (en) | High-carbon wheel steel, heat treatment method thereof and method for preparing wheel by using high-carbon wheel steel | |
| CN107675083B (en) | Obdurability pearlite steel rail and its manufacturing method | |
| CN101857914B (en) | Heat treatment method for materials of 25CrMo alloy steel hollow car axle for high-speed railway passenger trains | |
| EP3124636A1 (en) | Rail and method for manufacturing same | |
| CN111560562A (en) | Medium carbon steel wheel containing Cr and Mo and heat treatment method thereof | |
| CN101864514B (en) | EA1T steel axle heat treatment method | |
| CN111321343B (en) | High-strength-toughness and high-wear-resistance steel for forging coupler knuckle and heat treatment method and production method thereof | |
| CN110592496B (en) | Pearlite rail steel and preparation method thereof | |
| CN107674960A (en) | Passenger-cargo mixed fortune Rail for railway and its manufacture method | |
| CN115505844B (en) | Die forging and soft nitriding method for mine car wheels | |
| WO2022166155A1 (en) | Container crane wheel steel, wheel and preparation method therefor | |
| CN107675080B (en) | Anti- contact fatigue pearlite steel rail and its manufacturing method | |
| CN104762552A (en) | Wheel steel and heat treatment method and application thereof | |
| CN112176260B (en) | Steel for rolling steel balls with ultrahigh carbon and preparation method thereof | |
| CN112718855A (en) | Hypereutectoid steel rail and preparation method thereof | |
| CN113981325A (en) | Medium-strength steel rail and production method thereof | |
| CN112176152A (en) | High-speed rail axle with long fatigue life and speed per hour more than or equal to 400 kilometers and laser quenching method thereof | |
| CN100570005C (en) | The cold rolling bearing ring of a kind of medium carbon steel carburization process | |
| CN109551190A (en) | A kind of processing technology of stepped ramp type gear ring | |
| CN115094317B (en) | High-wear-resistance high-toughness steel and preparation method thereof | |
| CN115838852A (en) | Production method of steel for full-section uniform and strong hardening frog | |
| CN113088667B (en) | Heat treatment method for improving residual stress of wheel and wheel |
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 | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20231219 Address after: 276200 Tianjialing Industrial Community, Changlu Town, Mengyin County, Linyi City, Shandong Province Patentee after: Mengyin Junhua Hydraulic Machinery Co.,Ltd. Address before: 276211 Economic Development Zone, Mengyin County, Linyi City, Shandong Province Patentee before: MENGYIN JINHUA MACHINERY Co.,Ltd. |
|
| TR01 | Transfer of patent right |