CN112536206A - Processing method for improving fatigue resistance of steel beam - Google Patents
Processing method for improving fatigue resistance of steel beam Download PDFInfo
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- CN112536206A CN112536206A CN202011515837.1A CN202011515837A CN112536206A CN 112536206 A CN112536206 A CN 112536206A CN 202011515837 A CN202011515837 A CN 202011515837A CN 112536206 A CN112536206 A CN 112536206A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
- B05D7/14—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials to metal, e.g. car bodies
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D5/00—Processes for applying liquids or other fluent materials to surfaces to obtain special surface effects, finishes or structures
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
- B05D7/24—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials for applying particular liquids or other fluent materials
-
- 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
- C21D1/74—Methods of treatment in inert gas, controlled atmosphere, vacuum or pulverulent material
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/0068—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for particular articles not mentioned below
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D2202/00—Metallic substrate
- B05D2202/10—Metallic substrate based on Fe
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D2504/00—Epoxy polymers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D2601/00—Inorganic fillers
- B05D2601/20—Inorganic fillers used for non-pigmentation effect
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D2602/00—Organic fillers
Abstract
The invention discloses a processing method for improving the fatigue resistance of a steel beam; relates to the technical field of steel structures, and comprises the following steps: (1) obtaining a primary treatment steel beam; (2) obtaining a secondary treatment steel beam; (3) obtaining a third-time processed steel beam; (4) obtaining a treated fiber; (5) adding the treated fiber into epoxy resin liquid, then adding a curing agent, uniformly stirring, then performing surface coating treatment on the three-time treated steel beam, and then placing the steel beam in a constant temperature chamber for constant temperature drying to form a surface cured layer; the mechanical property of the steel beam treated by the method is improved to a certain extent, the application performance of the steel beam can be further improved by improving the mechanical property of the steel beam, and the fatigue resistance is improved to a certain extent.
Description
Technical Field
The invention belongs to the technical field of steel structures, and particularly relates to a processing method for improving fatigue resistance of a steel beam.
Background
The steel structure factory building mainly means that main bearing components are made of steel. Including the steel post, the girder steel, steel construction basis, steel roof truss (certainly the span of factory building is bigger, all is steel construction roof truss basically now), the steel roof, the wall of noticing the steel construction also can adopt the brick wall to maintain. As the steel yield of China is increased, steel structure plants are mostly adopted, and particularly, the steel structure plants can be divided into light steel structure plants and heavy steel structure plants. Industrial and civil building facilities constructed from steel are known as steel structures.
The steel structure factory building has the characteristics that: 1. The steel structure building has light weight, high strength and large span. 2. The construction period of the steel structure building is short, and the investment cost is correspondingly reduced. 3. The steel structure building has poor fire resistance, is not corrosion resistant, and is not suitable for areas with low temperature. 4. The steel structure building is convenient to move and is free of pollution during recycling.
The steel beam is an important supporting beam part in a steel structure factory building, but during working, the steel beam needs to be frequently impacted by external load, and after a long time, the steel beam is easy to cause fatigue fracture, so that the service life of the steel beam is greatly shortened, and therefore, certain improvement treatment needs to be carried out on the steel beam to improve the fatigue resistance of the steel beam.
Disclosure of Invention
The invention aims to provide a processing method for improving the fatigue resistance of a steel beam, so as to solve the defects in the prior art.
The technical scheme adopted by the invention is as follows:
a processing method for improving the fatigue resistance of a steel beam comprises the following steps:
(1) adding the steel beam piece into a resistance furnace, introducing inert gas, rapidly heating to 1120-1150 ℃, carrying out heat preservation treatment for 3-5min, and then cooling to room temperature to obtain a primary treated steel beam;
(2) placing the obtained primary treatment steel beam in a resistance furnace, slowly heating to the temperature of 620-;
(3) placing the secondary treated steel beam obtained by the treatment in a resistance furnace, heating to 480 ℃ at 450-;
(4) mixing carbon fibers and alumina fibers together to obtain mixed fibers, and then carrying out coupling agent treatment on the mixed fibers to obtain treated fibers;
(5) and adding the treated fiber into the epoxy resin liquid, then adding the curing agent, uniformly stirring, then performing surface coating treatment on the three-time treated steel beam, and then placing the steel beam in a thermostatic chamber for constant-temperature drying to form a surface cured layer.
The temperature rise rate of the rapid heating is 30-40 ℃/s.
The inert gas is nitrogen.
The temperature rising rate of the slow heating is 5-8 ℃/s.
The mixing mass ratio of the carbon fiber to the alumina fiber is 12: 1-2.
The coupling agent treatment comprises the following steps:
and sequentially adding the mixed fiber and the coupling agent solution into a vacuum impregnation reaction kettle, then adjusting the temperature to 70-75 ℃, carrying out heat preservation treatment for 2 hours, then taking out, washing with clear water, and drying at 40 ℃ for 10 hours to obtain the composite material.
The mixing mass ratio of the mixed fiber to the coupling agent solution is 1: 5;
the coupling agent solution comprises the following components in parts by weight: 9.5 to 10 portions of silane coupling agent, 30 portions of ethanol and 70 portions of deionized water.
The coupling agent is vinyl trimethoxy silane.
The processing fiber, the epoxy resin liquid and the curing agent are mixed according to the following weight parts: 12-16:40-50: 12-15;
the epoxy resin liquid is: glycidyl amine epoxy resins;
the curing agent is as follows: triethylene tetramine.
The thickness of the surface curing layer is 2 mm.
Has the advantages that:
by adopting the method of the invention to process the steel beam, the comprehensive performance of the steel beam can be effectively improved, the application range of the steel beam is further improved, the service life of the steel beam is delayed, and the cost is reduced.
The mechanical property of the steel beam treated by the method is improved to a certain extent, the application performance of the steel beam can be further improved by improving the mechanical property of the steel beam, and the fatigue resistance is improved to a certain extent.
The method can greatly improve the fatigue resistance of the steel beam by processing the steel beam for three times, can promote a large amount of effective austenite grains to elongate along the rolling direction, has a small amount of recrystallized grains, and has a large amount of second phases distributed on grain boundaries and the inner parts of the grains. Through the three times of processing that carries on in proper order for the grain size crescent and tend to the equiaxial, the recrystallization phenomenon has taken place in crystal boundary department, and the precipitate phase is more dispersed evenly, very big improvement the mechanical properties of girder steel, then cover the surface curing layer to the girder steel surface, the fatigue resistance of improvement girder steel that can show can also play the expanding rate that restraines fatigue crack, postpones the life of girder steel.
Detailed Description
A processing method for improving the fatigue resistance of a steel beam comprises the following steps:
(1) adding the steel beam piece into a resistance furnace, introducing inert gas, rapidly heating to 1120-1150 ℃, carrying out heat preservation treatment for 3-5min, and then cooling to room temperature to obtain a primary treated steel beam;
(2) placing the obtained primary treatment steel beam in a resistance furnace, slowly heating to the temperature of 620-;
(3) placing the secondary treated steel beam obtained by the treatment in a resistance furnace, heating to 480 ℃ at 450-;
(4) mixing carbon fibers and alumina fibers together to obtain mixed fibers, and then carrying out coupling agent treatment on the mixed fibers to obtain treated fibers;
(5) and adding the treated fiber into the epoxy resin liquid, then adding the curing agent, uniformly stirring, then performing surface coating treatment on the three-time treated steel beam, and then placing the steel beam in a thermostatic chamber for constant-temperature drying to form a surface cured layer.
The temperature rise rate of the rapid heating is 30-40 ℃/s.
The inert gas is nitrogen.
The temperature rising rate of the slow heating is 5-8 ℃/s.
The mixing mass ratio of the carbon fiber to the alumina fiber is 12: 1-2.
The coupling agent treatment comprises the following steps:
and sequentially adding the mixed fiber and the coupling agent solution into a vacuum impregnation reaction kettle, then adjusting the temperature to 70-75 ℃, carrying out heat preservation treatment for 2 hours, then taking out, washing with clear water, and drying at 40 ℃ for 10 hours to obtain the composite material.
The mixing mass ratio of the mixed fiber to the coupling agent solution is 1: 5;
the coupling agent solution comprises the following components in parts by weight: 9.5 to 10 portions of silane coupling agent, 30 portions of ethanol and 70 portions of deionized water.
The coupling agent is vinyl trimethoxy silane.
The processing fiber, the epoxy resin liquid and the curing agent are mixed according to the following weight parts: 12-16:40-50: 12-15;
the epoxy resin liquid is: glycidyl amine epoxy resins;
the curing agent is as follows: triethylene tetramine.
The thickness of the surface curing layer is 2 mm.
The following will clearly and completely describe the technical solutions of 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 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
A processing method for improving the fatigue resistance of a steel beam comprises the following steps:
(1) adding the steel beam piece into a resistance furnace, introducing inert gas, rapidly heating to 1120 ℃, carrying out heat preservation treatment for 3min, and then cooling to room temperature to obtain a primary treated steel beam; the temperature rise rate of the rapid heating is 30 ℃/s. The inert gas is nitrogen.
(2) Placing the obtained primary treatment steel beam in a resistance furnace, slowly heating to 620 ℃ in the air atmosphere, then preserving heat for 5min, adjusting the temperature to 810 ℃, preserving heat for 4min, then continuously adjusting the temperature to 990 ℃, preserving heat for 2min, and then cooling to room temperature along with the furnace to obtain a secondary treatment steel beam; the heating rate of the slow heating is 5 ℃/s.
(3) Placing the secondary treatment steel beam obtained by the treatment in a resistance furnace, heating to 450 ℃, preserving heat for 3 hours, and then performing air cooling to room temperature to obtain a tertiary treatment steel beam;
(4) mixing carbon fibers and alumina fibers together to obtain mixed fibers, and then carrying out coupling agent treatment on the mixed fibers to obtain treated fibers; the mixing mass ratio of the carbon fibers to the alumina fibers is 12:1. The coupling agent treatment comprises the following steps: and sequentially adding the mixed fiber and the coupling agent solution into a vacuum impregnation reaction kettle, then adjusting the temperature to 70 ℃, carrying out heat preservation treatment for 2 hours, then taking out, washing with clear water, and drying at 40 ℃ for 10 hours to obtain the composite material. The mixing mass ratio of the mixed fiber to the coupling agent solution is 1: 5; the coupling agent solution comprises the following components in parts by weight: 9.5 of silane coupling agent, 30 of ethanol and 70 of deionized water. The coupling agent is vinyl trimethoxy silane.
(5) And adding the treated fiber into the epoxy resin liquid, then adding the curing agent, uniformly stirring, then performing surface coating treatment on the three-time treated steel beam, and then placing the steel beam in a thermostatic chamber for constant-temperature drying to form a surface cured layer. The processing fiber, the epoxy resin liquid and the curing agent are mixed according to the following weight parts: 12:40: 12; the epoxy resin liquid is: glycidyl amine epoxy resins; the curing agent is as follows: triethylene tetramine. The thickness of the surface curing layer is 2 mm.
Example 2
A processing method for improving the fatigue resistance of a steel beam comprises the following steps:
(1) adding the steel beam piece into a resistance furnace, introducing inert gas, rapidly heating to 1150 ℃, carrying out heat preservation treatment for 5min, and then cooling to room temperature to obtain a primary treated steel beam; the temperature rise rate of the rapid heating is 40 ℃/s. The inert gas is nitrogen.
(2) Placing the obtained primary treatment steel beam in a resistance furnace, slowly heating to 660 ℃ in air atmosphere, then preserving heat for 8min, regulating the temperature to 840 ℃, preserving heat for 6min, then continuously regulating the temperature to 1030 ℃, preserving heat for 3min, and then cooling to room temperature along with the furnace to obtain a secondary treatment steel beam; the heating rate of the slow heating is 8 ℃/s.
(3) Placing the secondary treatment steel beam obtained by the treatment in a resistance furnace, heating to 480 ℃, preserving heat for 4 hours, and then carrying out air cooling to room temperature to obtain a tertiary treatment steel beam;
(4) mixing carbon fibers and alumina fibers together to obtain mixed fibers, and then carrying out coupling agent treatment on the mixed fibers to obtain treated fibers; the mixing mass ratio of the carbon fibers to the alumina fibers is 12: 2. The coupling agent treatment comprises the following steps: and sequentially adding the mixed fiber and the coupling agent solution into a vacuum impregnation reaction kettle, then adjusting the temperature to 75 ℃, carrying out heat preservation treatment for 2 hours, then taking out, washing with clear water, and drying at 40 ℃ for 10 hours to obtain the composite material. The mixing mass ratio of the mixed fiber to the coupling agent solution is 1: 5; the coupling agent solution comprises the following components in parts by weight: silane coupling agent 10, ethanol 30 and deionized water 70. The coupling agent is vinyl trimethoxy silane.
(5) And adding the treated fiber into the epoxy resin liquid, then adding the curing agent, uniformly stirring, then performing surface coating treatment on the three-time treated steel beam, and then placing the steel beam in a thermostatic chamber for constant-temperature drying to form a surface cured layer. The processing fiber, the epoxy resin liquid and the curing agent are mixed according to the following weight parts: 16:50: 15; the epoxy resin liquid is: glycidyl amine epoxy resins; the curing agent is as follows: triethylene tetramine. The thickness of the surface curing layer is 2 mm.
Example 3
A processing method for improving the fatigue resistance of a steel beam comprises the following steps:
(1) adding the steel beam piece into a resistance furnace, introducing inert gas, rapidly heating to 1133 ℃, carrying out heat preservation treatment for 4min, and then cooling to room temperature to obtain a primary treatment steel beam; the temperature rise rate of the rapid heating is 35 ℃/s. The inert gas is nitrogen.
(2) Placing the obtained primary treatment steel beam in a resistance furnace, slowly heating to 630 ℃ in the air atmosphere, then preserving heat for 6min, adjusting the temperature to 830 ℃, preserving heat for 5min, then continuously adjusting the temperature to 1010 ℃, preserving heat for 2.5min, and then cooling to room temperature along with the furnace to obtain a secondary treatment steel beam; the temperature rise rate of the slow heating is 6 ℃/s.
(3) Placing the secondary treatment steel beam obtained by the treatment in a resistance furnace, heating to 463 ℃, preserving heat for 3.6 hours, and then performing air cooling to room temperature to obtain a tertiary treatment steel beam;
(4) mixing carbon fibers and alumina fibers together to obtain mixed fibers, and then carrying out coupling agent treatment on the mixed fibers to obtain treated fibers; the mixing mass ratio of the carbon fibers to the alumina fibers is 12: 1.4. The coupling agent treatment comprises the following steps: and sequentially adding the mixed fiber and the coupling agent solution into a vacuum impregnation reaction kettle, then adjusting the temperature to 73 ℃, carrying out heat preservation treatment for 2 hours, then taking out, washing with clear water, and drying at 40 ℃ for 10 hours to obtain the composite material. The mixing mass ratio of the mixed fiber to the coupling agent solution is 1: 5; the coupling agent solution comprises the following components in parts by weight: 9.8 of silane coupling agent, 30 of ethanol and 70 of deionized water. The coupling agent is vinyl trimethoxy silane.
(5) And adding the treated fiber into the epoxy resin liquid, then adding the curing agent, uniformly stirring, then performing surface coating treatment on the three-time treated steel beam, and then placing the steel beam in a thermostatic chamber for constant-temperature drying to form a surface cured layer. The processing fiber, the epoxy resin liquid and the curing agent are mixed according to the following weight parts: 15.2:46: 13; the epoxy resin liquid is: glycidyl amine epoxy resins; the curing agent is as follows: triethylene tetramine. The thickness of the surface curing layer is 2 mm.
The steel beam type specification is H194 multiplied by 150 multiplied by 6 multiplied by 9H type hot rolling steel beam, and the steel type is Q345-B.
The yield strength is 435MPa, the tensile strength is 620MPa, and the elastic modulus is 206 MPa;
the method of the embodiment and the method of the comparative example are respectively adopted to process and compare the samples;
TABLE 1
| Yield strength/MPa | Modulus of elasticity/MPa | |
| Example 1 | 452 | 211 |
| Example 2 | 453 | 213 |
| Example 3 | 456 | 216 |
As can be seen from Table 1, the mechanical properties of the steel beam treated by the method are improved to a certain extent, the application properties of the steel beam can be further improved by improving the mechanical properties of the steel beam, and the fatigue resistance is improved to a certain extent.
And (3) fatigue resistance test:
when adding the load near fatigue load upper and lower limit mean, open testing machine vibration switch, carry out the fatigue loading test of circulation:
the stress amplitude is 155 MPa;
TABLE 2
| Fatigue life/104Next time | |
| Example 1 | 341 |
| Example 2 | 345 |
| Example 3 | 354 |
| Comparative example 1 | 190 |
| Comparative example 2 | 312 |
| Blank control group | 153 |
Comparative example 1: the difference from example 3 is that no resin coating is performed;
comparative example 2: the difference from the example 3 is that three times of treatment are not carried out;
table 2 shows that the steel beam treated by the method of the present invention can greatly improve the fatigue resistance of the steel beam, and the method of the present invention can promote a large amount of effective austenite grains to elongate along the rolling direction by three times of treatment of the steel beam, and has a small amount of recrystallized grains, and a large amount of second phases are distributed in the grain boundaries and the grains. Through the three times of processing that carries on in proper order for the grain size crescent and tend to the equiaxial, the recrystallization phenomenon has taken place in crystal boundary department, and the precipitate phase is more dispersed evenly, very big improvement the mechanical properties of girder steel, then cover the surface curing layer to the girder steel surface, the fatigue resistance of improvement girder steel that can show can also play the expanding rate that restraines fatigue crack, postpones the life of girder steel.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention, and the present invention is not limited to the illustrated embodiments, and all the modifications and equivalents of the embodiments may be made without departing from the spirit of the present invention.
Claims (10)
1. A processing method for improving the fatigue resistance of a steel beam is characterized by comprising the following steps:
(1) adding the steel beam piece into a resistance furnace, introducing inert gas, rapidly heating to 1120-1150 ℃, carrying out heat preservation treatment for 3-5min, and then cooling to room temperature to obtain a primary treated steel beam;
(2) placing the obtained primary treatment steel beam in a resistance furnace, slowly heating to the temperature of 620-;
(3) placing the secondary treated steel beam obtained by the treatment in a resistance furnace, heating to 480 ℃ at 450-;
(4) mixing carbon fibers and alumina fibers together to obtain mixed fibers, and then carrying out coupling agent treatment on the mixed fibers to obtain treated fibers;
(5) and adding the treated fiber into the epoxy resin liquid, then adding the curing agent, uniformly stirring, then performing surface coating treatment on the three-time treated steel beam, and then placing the steel beam in a thermostatic chamber for constant-temperature drying to form a surface cured layer.
2. The processing method for improving the fatigue resistance of the steel beam as claimed in claim 1, wherein: the temperature rise rate of the rapid heating is 30-40 ℃/s.
3. The processing method for improving the fatigue resistance of the steel beam as claimed in claim 1, wherein: the inert gas is nitrogen.
4. The processing method for improving the fatigue resistance of the steel beam as claimed in claim 1, wherein: the temperature rising rate of the slow heating is 5-8 ℃/s.
5. The processing method for improving the fatigue resistance of the steel beam as claimed in claim 1, wherein: the mixing mass ratio of the carbon fiber to the alumina fiber is 12: 1-2.
6. The processing method for improving the fatigue resistance of the steel beam as claimed in claim 1, wherein: the coupling agent treatment comprises the following steps:
and sequentially adding the mixed fiber and the coupling agent solution into a vacuum impregnation reaction kettle, then adjusting the temperature to 70-75 ℃, carrying out heat preservation treatment for 2 hours, then taking out, washing with clear water, and drying at 40 ℃ for 10 hours to obtain the composite material.
7. The processing method for improving the fatigue resistance of the steel beam as claimed in claim 6, wherein: the mixing mass ratio of the mixed fiber to the coupling agent solution is 1: 5;
the coupling agent solution comprises the following components in parts by weight: 9.5 to 10 portions of silane coupling agent, 30 portions of ethanol and 70 portions of deionized water.
8. The processing method for improving the fatigue resistance of the steel beam as claimed in claim 7, wherein: the coupling agent is vinyl trimethoxy silane.
9. The processing method for improving the fatigue resistance of the steel beam as claimed in claim 1, wherein: the processing fiber, the epoxy resin liquid and the curing agent are mixed according to the following weight parts: 12-16:40-50: 12-15;
the epoxy resin liquid is: glycidyl amine epoxy resins;
the curing agent is as follows: triethylene tetramine.
10. The processing method for improving the fatigue resistance of the steel beam as claimed in claim 1, wherein: the thickness of the surface curing layer is 2 mm.
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20020050307A1 (en) * | 2000-05-12 | 2002-05-02 | Nakamura Industrial Co., Ltd. | Method for high concentration carburizing and quenching of steel and high concentration carburized and quenched steel part |
| CN1578799A (en) * | 2001-11-07 | 2005-02-09 | 东丽株式会社 | Epoxy resin compositions for fiber-reinforced composite materials, process for production of the materials and fiber-reinforced composite materials |
| CN104745965A (en) * | 2015-03-04 | 2015-07-01 | 鞍钢集团矿业公司 | High-carbon medium-chromium medium-manganese multicomponent alloy steel ball mill lining plate and thermal treatment process thereof |
| CN106459431A (en) * | 2014-05-12 | 2017-02-22 | 多元化化学技术有限公司 | Sprayable, carbon fiber-epoxy material and process |
| CN107598491A (en) * | 2017-09-21 | 2018-01-19 | 长乐晶尚设计有限公司 | A kind of high intensity bridge precasting steel frame and its manufacture method |
| US20180171087A1 (en) * | 2016-12-20 | 2018-06-21 | Sika Technology Ag | Article of thermosetting epoxy resin composition and carbon fibre fabric, and reinforced structural component made therewith |
-
2020
- 2020-12-21 CN CN202011515837.1A patent/CN112536206A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20020050307A1 (en) * | 2000-05-12 | 2002-05-02 | Nakamura Industrial Co., Ltd. | Method for high concentration carburizing and quenching of steel and high concentration carburized and quenched steel part |
| CN1578799A (en) * | 2001-11-07 | 2005-02-09 | 东丽株式会社 | Epoxy resin compositions for fiber-reinforced composite materials, process for production of the materials and fiber-reinforced composite materials |
| CN106459431A (en) * | 2014-05-12 | 2017-02-22 | 多元化化学技术有限公司 | Sprayable, carbon fiber-epoxy material and process |
| CN104745965A (en) * | 2015-03-04 | 2015-07-01 | 鞍钢集团矿业公司 | High-carbon medium-chromium medium-manganese multicomponent alloy steel ball mill lining plate and thermal treatment process thereof |
| US20180171087A1 (en) * | 2016-12-20 | 2018-06-21 | Sika Technology Ag | Article of thermosetting epoxy resin composition and carbon fibre fabric, and reinforced structural component made therewith |
| CN107598491A (en) * | 2017-09-21 | 2018-01-19 | 长乐晶尚设计有限公司 | A kind of high intensity bridge precasting steel frame and its manufacture method |
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Application publication date: 20210323 |