CN111455142B - Heat treatment method of self-locking nut - Google Patents
Heat treatment method of self-locking nut Download PDFInfo
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- CN111455142B CN111455142B CN202010236965.6A CN202010236965A CN111455142B CN 111455142 B CN111455142 B CN 111455142B CN 202010236965 A CN202010236965 A CN 202010236965A CN 111455142 B CN111455142 B CN 111455142B
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- Prior art keywords
- self
- locking nut
- heat treatment
- cooling
- temperature
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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
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/18—Hardening; Quenching with or without subsequent tempering
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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
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C18/00—Alloys based on zinc
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- 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
- C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
- C23C2/04—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor characterised by the coating material
- C23C2/06—Zinc or cadmium or alloys based thereon
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- 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
- C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
- C23C2/34—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor characterised by the shape of the material to be treated
Abstract
The invention discloses a heat treatment method of a self-locking nut, which comprises the following steps: a. preparing raw materials; b. quenching; c. cooling; d. tempering; e. hot galvanizing; f. passivating, g, cooling. Through the mode, the heat treatment method of the self-locking nut provided by the invention has the advantages that the heat stress in the self-locking nut is uniformly treated, the toughness and the texture of the self-locking nut are improved on one hand, the mechanical property is good, and the surface quality of the self-locking nut is improved on the other hand, so that the corrosion resistance of the self-locking nut is effectively improved, and the service life of the self-locking nut is prolonged.
Description
Technical Field
The invention relates to the technical field of wind power bases, in particular to a heat treatment method of a self-locking nut.
Background
Nut and bolt cooperation are a locking mode that uses more commonly in the industry, and in order to keep being connected between nut and the bolt inseparabler, all can adopt the auto-lock nut under a lot of circumstances, the auto-lock nut has and connects inseparabler, the difficult not hard up advantage under the exogenic action.
After the self-locking nut is formed, the internal structure needs to be improved through a heat treatment process, so that the mechanical strength is improved, and if the self-locking nut is treated through general heat treatment, the heat stress in the self-locking nut is not uniformly treated, so that the mechanical performance is poor.
Disclosure of Invention
The invention mainly solves the technical problem of providing a heat treatment method of the self-locking nut, the heat stress in the self-locking nut is uniformly treated, on one hand, the toughness and the texture of the self-locking nut are improved, the mechanical property is good, on the other hand, the surface quality of the self-locking nut is improved, thereby effectively improving the corrosion resistance of the self-locking nut and prolonging the service life of the self-locking nut.
In order to solve the technical problems, the invention adopts a technical scheme that: the heat treatment method for the self-locking nut comprises the following steps:
a. preparing raw materials: adopting 34 steel or 35 steel to prepare a self-locking nut blank;
b. quenching: placing the self-locking nut blank into a heat treatment furnace, heating to 400 ℃, and then heating to a quenching temperature at a heating speed of not more than 200-;
c. and (3) cooling: taking the pipe self-locking nut blank out of the heat treatment furnace, and cooling to room temperature in a water cooling mode;
d. tempering: placing the cooled self-locking nut blank into a tempering device for heating, gradually raising the temperature in the tempering device to 450-650 ℃ within 30 minutes, preserving the heat for 3-4 hours, and cooling to room temperature;
e. hot galvanizing: placing the tempered self-locking nut blank into a galvanizing pot for hot galvanizing treatment to form a galvanized self-locking nut;
f. and (3) cooling: and cooling the galvanized self-locking nut to room temperature by using compressed air.
In a preferred embodiment of the present invention, the quenching time in the step b is 1-2min/mm and not less than 30 min.
In a preferred embodiment of the present invention, a galvanizing liquid is placed in the galvanizing pot in the step e.
In a preferred embodiment of the invention, the zinc plating solution comprises an alloy of 0.08-0.12% nickel, 0.05-0.07% rhenium, 0.06-0.08% bismuth and 0.02-0.05% aluminum by weight.
In a preferred embodiment of the present invention, the temperature during the step e of zinc plating is 445-545 ℃ for 3-6 min.
In a preferred embodiment of the present invention, the pressure of the compressed air in step f is 0-6MPa, and the wind speed is 3-9 m/min.
The invention has the beneficial effects that: according to the heat treatment method for the self-locking nut, the heat stress in the self-locking nut is treated uniformly, so that the toughness and texture of the self-locking nut are improved, the mechanical property is good, the surface quality of the self-locking nut is improved, the corrosion resistance of the self-locking nut is effectively improved, and the service life of the self-locking nut is prolonged.
Drawings
FIG. 1 is a flow chart of a preferred embodiment of a heat treatment method for a self-locking nut according to the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all 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.
As shown in fig. 1, an embodiment of the present invention includes:
a heat treatment method of a self-locking nut comprises the following steps:
a. preparing raw materials: adopting 34 steel or 35 steel to prepare a self-locking nut blank;
b. quenching: placing the self-locking nut blank into a heat treatment furnace, after the temperature is raised to 400 ℃, raising the temperature to the quenching temperature at a heating speed of not higher than 200-;
c. and (3) cooling: taking the pipe self-locking nut blank out of the heat treatment furnace, and cooling to room temperature in a water cooling mode;
d. tempering: placing the cooled self-locking nut blank into a tempering device for heating, gradually raising the temperature in the tempering device to 450-650 ℃ within 30 minutes, preserving the heat for 3-4 hours, and cooling to room temperature;
e. hot galvanizing: placing the tempered self-locking nut blank in a galvanizing pot for hot galvanizing treatment to form a galvanized self-locking nut, wherein the temperature during galvanizing is 445-;
f. and (3) cooling: and cooling the galvanized self-locking nut to room temperature by using compressed air, wherein the pressure of the compressed air is 0-6MPa, and the wind speed is 3-9 m/min.
In the above, the galvanizing pot in the step e is placed with galvanizing liquid. Wherein, the galvanizing solution comprises 0.08 to 0.12 percent of nickel, 0.05 to 0.07 percent of rhenium, 0.06 to 0.08 percent of bismuth and 0.02 to 0.05 percent of aluminum by weight percent, and the self-locking nut prepared by the method has continuous and complete galvanizing layer, uniform color and strong zinc layer adhesiveness.
Example 1:
a heat treatment method of a self-locking nut comprises the following steps:
a. preparing raw materials: adopting 34 steel to manufacture a self-locking nut blank;
b. quenching: placing the self-locking nut blank into a heat treatment furnace, heating to 400 ℃, then heating to a quenching temperature at a heating speed of not higher than 200 ℃/h, wherein the quenching temperature is 900 ℃, and the quenching time is 1min/mm and is not less than 30 min;
c. and (3) cooling: taking the pipe self-locking nut blank out of the heat treatment furnace, and cooling to room temperature in a water cooling mode;
d. tempering: putting the cooled self-locking nut blank into a tempering device for heating, gradually raising the temperature in the tempering device to 500 ℃ within 30 minutes, preserving the heat for 3.5 hours, and cooling to room temperature;
e. hot galvanizing: placing the tempered self-locking nut blank in a galvanizing pot for hot galvanizing treatment to form a galvanized self-locking nut, wherein the temperature during galvanizing is 500 ℃ and the time is 5 min;
f. and (3) cooling: and cooling the galvanized self-locking nut to room temperature by using compressed air, wherein the pressure of the compressed air is 3MPa, and the wind speed is 6 m/min.
In the above, the galvanizing pot in the step e is placed with galvanizing liquid. The zinc plating solution comprises an alloy consisting of 0.09 wt% of nickel, 0.06 wt% of rhenium, 0.07 wt% of bismuth and 0.04 wt% of aluminum, and the prepared self-locking nut has a continuous and complete zinc plating layer, uniform color and strong zinc layer adhesion.
Example 2:
a heat treatment method of a self-locking nut comprises the following steps:
a. preparing raw materials: adopting 34 steel or 35 steel to prepare a self-locking nut blank;
b. quenching: placing the self-locking nut blank into a heat treatment furnace, heating to 400 ℃, then heating to quenching temperature at a heating speed of not higher than 250 ℃/h, wherein the quenching temperature is 910 ℃, and the quenching time is 2min/mm and is not less than 30 min;
c. and (3) cooling: taking the pipe self-locking nut blank out of the heat treatment furnace, and cooling to room temperature in a water cooling mode;
d. tempering: putting the cooled self-locking nut blank into a tempering device for heating, gradually raising the temperature in the tempering device to 480 ℃ within 30 minutes, preserving the heat for 3.8 hours, and cooling to room temperature;
e. hot galvanizing: placing the tempered self-locking nut blank in a galvanizing pot for hot galvanizing treatment to form a galvanized self-locking nut, wherein the temperature during galvanizing is 520 ℃ and the time is 6 min;
f. and (3) cooling: and cooling the galvanized self-locking nut to room temperature by using compressed air, wherein the pressure of the compressed air is 5MPa, and the wind speed is 8 m/min.
In the above, the galvanizing pot in the step e is placed with galvanizing liquid. The zinc plating solution comprises an alloy consisting of 0.10 wt% of nickel, 0.07 wt% of rhenium, 0.08 wt% of bismuth and 0.03 wt% of aluminum, and the prepared self-locking nut has a continuous and complete zinc plating layer, uniform color and strong zinc layer adhesion.
In summary, according to the heat treatment method for the self-locking nut provided by the invention, the heat stress in the self-locking nut is uniformly treated, so that on one hand, the toughness and texture of the self-locking nut are improved, and the mechanical property is good, and on the other hand, the surface quality of the self-locking nut is improved, thereby effectively improving the corrosion resistance of the self-locking nut and prolonging the service life of the self-locking nut.
The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes, which are made by the present specification, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (5)
1. A heat treatment method of a self-locking nut is characterized by comprising the following steps:
a. preparing raw materials: adopting 34 steel or 35 steel to prepare a self-locking nut blank;
b. quenching: placing the self-locking nut blank into a heat treatment furnace, after the temperature is raised to 400 ℃, raising the temperature to the quenching temperature at a heating speed of not higher than 200-;
c. and (3) cooling: taking the pipe self-locking nut blank out of the heat treatment furnace, and cooling to room temperature in a water cooling mode;
d. tempering: placing the cooled self-locking nut blank into a tempering device for heating, gradually raising the temperature in the tempering device to 450-650 ℃ within 30 minutes, preserving the heat for 3-4 hours, and cooling to room temperature;
e. hot galvanizing: placing the tempered self-locking nut blank into a galvanizing pot for hot galvanizing treatment to form a galvanized self-locking nut;
f. and (3) cooling: and cooling the galvanized self-locking nut to room temperature by using compressed air.
2. The method for heat-treating a self-locking nut as claimed in claim 1, wherein the galvanizing pot is filled with the galvanizing liquid in the step e.
3. The heat treatment method for self-locking nuts as claimed in claim 1, characterized in that said galvanising liquid comprises an alloy consisting of, in weight percent, 0.08-0.12% nickel, 0.05-0.07% rhenium, 0.06-0.08% bismuth and 0.02-0.05% aluminum.
4. The heat treatment method for the self-locking nut as recited in claim 1, wherein the temperature of the galvanization in the step e is 445-.
5. The heat treatment method for the self-locking nut as recited in claim 1, wherein the pressure of the compressed air in the step f is 0 to 6MPa, and the wind speed is 3 to 9 m/min.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010236965.6A CN111455142B (en) | 2020-03-30 | 2020-03-30 | Heat treatment method of self-locking nut |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010236965.6A CN111455142B (en) | 2020-03-30 | 2020-03-30 | Heat treatment method of self-locking nut |
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| Publication Number | Publication Date |
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| CN111455142A CN111455142A (en) | 2020-07-28 |
| CN111455142B true CN111455142B (en) | 2021-09-07 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202010236965.6A Active CN111455142B (en) | 2020-03-30 | 2020-03-30 | Heat treatment method of self-locking nut |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112025217A (en) * | 2020-08-24 | 2020-12-04 | 温州市强邦实业有限公司 | Production process of corrosion-resistant butterfly nut |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1096029A1 (en) * | 1999-04-21 | 2001-05-02 | Kawasaki Steel Corporation | High tensile hot-dip zinc-coated steel plate excellent in ductility and method for production thereof |
| CN101486047A (en) * | 2009-02-25 | 2009-07-22 | 沪东重机有限公司 | Method for producing whole metal self-locking nut |
| CN104988402A (en) * | 2015-05-29 | 2015-10-21 | 海盐宇星螺帽有限责任公司 | Galvanized nut machining technology |
| CN109576478A (en) * | 2018-12-18 | 2019-04-05 | 沧州隆泰迪管道科技有限公司 | A kind of pipe fitting heat treatment method |
| CN110669918A (en) * | 2019-10-16 | 2020-01-10 | 安庆锦泰金属材料科技有限公司 | Heat treatment quenching process for high-toughness steel strip |
| CN110760648A (en) * | 2019-11-14 | 2020-02-07 | 北京金兆博高强度紧固件有限公司 | Weather-resistant bolt production process |
-
2020
- 2020-03-30 CN CN202010236965.6A patent/CN111455142B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1096029A1 (en) * | 1999-04-21 | 2001-05-02 | Kawasaki Steel Corporation | High tensile hot-dip zinc-coated steel plate excellent in ductility and method for production thereof |
| CN101486047A (en) * | 2009-02-25 | 2009-07-22 | 沪东重机有限公司 | Method for producing whole metal self-locking nut |
| CN104988402A (en) * | 2015-05-29 | 2015-10-21 | 海盐宇星螺帽有限责任公司 | Galvanized nut machining technology |
| CN109576478A (en) * | 2018-12-18 | 2019-04-05 | 沧州隆泰迪管道科技有限公司 | A kind of pipe fitting heat treatment method |
| CN110669918A (en) * | 2019-10-16 | 2020-01-10 | 安庆锦泰金属材料科技有限公司 | Heat treatment quenching process for high-toughness steel strip |
| CN110760648A (en) * | 2019-11-14 | 2020-02-07 | 北京金兆博高强度紧固件有限公司 | Weather-resistant bolt production process |
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| CN111455142A (en) | 2020-07-28 |
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Effective date of registration: 20220614 Address after: No. 8, Lecheng Road, Bixi street, Changshu, Suzhou, Jiangsu 215500 Patentee after: CHANGSHU CITY NO.2 STANDARD PARTS FACTORY Address before: 215500 Taipingqiao village, Xingang Town, Changshu City, Suzhou City, Jiangsu Province Patentee before: Changshu spirit Standard Parts Co.,Ltd. |
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