CN119800229A - A high-strength anchor bolt and preparation method thereof - Google Patents
A high-strength anchor bolt and preparation method thereof Download PDFInfo
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- CN119800229A CN119800229A CN202510044434.XA CN202510044434A CN119800229A CN 119800229 A CN119800229 A CN 119800229A CN 202510044434 A CN202510044434 A CN 202510044434A CN 119800229 A CN119800229 A CN 119800229A
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Abstract
本发明涉及螺栓技术领域，提出了一种高强度地脚螺栓及其制备方法，地脚螺栓包括基体和增强相，基体由以下重量百分比的组分组成：C 0.2%~0.38%、Mn 0.24%~0.35%、V 0.12%~0.18%、W 0.05%~0.15%、Sn 0.14%~0.28%、Cu 0.018%~0.15%、Se 0.018%~0.15%、P≤0.055%、S≤0.045%，其余为铁及其不可避免的杂质；增强相为氮化硼；基体和增强相的重量比为100:2~5。通过上述技术方案，解决了相关技术中地脚螺栓力学性能差的问题。The invention relates to the technical field of bolts, and proposes a high-strength anchor bolt and a preparation method thereof. The anchor bolt comprises a matrix and a reinforcement phase, wherein the matrix is composed of the following components in weight percentage: C 0.2%-0.38%, Mn 0.24%-0.35%, V 0.12%-0.18%, W 0.05%-0.15%, Sn 0.14%-0.28%, Cu 0.018%-0.15%, Se 0.018%-0.15%, P≤0.055%, S≤0.045%, and the rest is iron and its inevitable impurities; the reinforcement phase is boron nitride; and the weight ratio of the matrix to the reinforcement phase is 100:2-5. Through the above technical scheme, the problem of poor mechanical properties of the anchor bolt in the related art is solved.
Description
Technical Field
The invention relates to the technical field of bolts, in particular to a high-strength foundation bolt and a preparation method thereof.
Background
An anchor bolt is a basic connecting piece for fixing a machine or a structure on the ground, and plays a critical role in the fixation of building auxiliary equipment and the overall stability of a building structure, for example, in a high-rise building, an elevator equipment is fixed to the building structure by the anchor bolt. If the foundation bolts are in trouble, the elevator may malfunction, affecting the normal use of the building. In addition, for some buildings with special requirements, such as earthquake-resistant buildings, the foundation bolts can enhance the connection between the building equipment and the main body structure, improve the earthquake-resistant performance of the building in natural disasters such as earthquakes and the like, and ensure the safety of personnel and property in the building. However, the conventional anchor bolts have limited mechanical properties, and the anchor bolts which bear various loads for a long period of time are easily broken, so that the service life and fastening effect of the bolts are reduced. Therefore, the mechanical property of the foundation bolt is improved, and the method has important significance for prolonging the service life of the foundation bolt.
Disclosure of Invention
The invention provides a high-strength foundation bolt and a preparation method thereof, which solve the problem of poor mechanical properties of the foundation bolt in the related art.
The technical scheme of the invention is as follows:
The invention provides a high-strength foundation bolt which comprises a matrix and a reinforcing phase, wherein the matrix consists of the following components in percentage by weight, ：C 0.2%~0.38%、Mn 0.24%~0.35%、V 0.12%~0.18%、W 0.05%~0.15%、Sn 0.14%~0.28%、Cu 0.018%~0.15%、Se 0.018%~0.15%、P≤0.055%、S≤0.045%, and iron and unavoidable impurities thereof;
the reinforcing phase is boron nitride;
The weight ratio of the matrix to the reinforcing phase is 100:2-5.
As a further technical scheme, the weight ratio of the sum of the weight of Cu and the weight of Se to the weight of Sn is 1-3:3.
When the weight ratio of Cu to Se to Sn is 1-3:3, the mechanical property of the foundation bolt can be further improved.
As a further technical scheme, the weight ratio of the Cu to the Se is 1:1.
As a further technical scheme, the median particle size of the boron nitride is 200 nm-10 mu m.
As a further technical scheme, the boron nitride is modified boron nitride, and the raw materials of the modified boron nitride comprise boron nitride, tungsten powder and molybdenum powder.
According to the invention, the boron nitride is modified by the tungsten powder and the molybdenum powder, so that the chemical activity of the boron nitride enhancement relative to molten metal can be improved, and the boron nitride has better wetting effect on the molten metal, so that the interface combination property of the boron nitride and a matrix is further improved, and the mechanical property of the foundation bolt is further improved.
As a further technical scheme, the weight ratio of the boron nitride to the tungsten powder to the molybdenum powder is 90:2-4:1.
When the weight ratio of the boron nitride to the tungsten powder to the molybdenum powder is 90:2-4:1, the mechanical property of the foundation bolt is further improved.
The preparation method of the modified boron nitride comprises the following steps of mixing the boron nitride, the tungsten powder and the molybdenum powder, hot-pressing, sintering and crushing to obtain the modified boron nitride.
As a further technical scheme, the hot press sintering is carried out at a temperature of 1500-1600 ℃, a pressure of 15-25 MPa and a time of 2-3 h.
As a further technical scheme, the median particle size of the tungsten powder is 100-200 nm, and the median particle size of the molybdenum powder is 50-200 nm.
The invention also provides a preparation method of the high-strength foundation bolt, which comprises the following steps:
S1, weighing materials according to the weight percentage of the matrix, mixing, and smelting to obtain molten steel;
S2, adding the reinforcing phase into the molten steel, uniformly mixing, casting and forming to obtain a bolt blank;
And S3, carrying out drawing, cold heading forming, thread processing and heat treatment on the bolt blank, and cooling to obtain the foundation bolt.
As a further technical scheme, in the step S3, the temperature is 650-850 ℃ and the time is 1-2 h during the heat treatment.
The working principle and the beneficial effects of the invention are as follows:
According to the invention, the foundation bolt with uniform and stable internal structure and good mechanical property is prepared by optimizing the components of the matrix in the foundation bolt and introducing the boron nitride reinforcing phase under the effective action of each component. By introducing three elements of Cu, se and Sn, the mechanical properties of the foundation bolt are obviously improved under the effective collocation action of the three elements. In addition, the boron nitride reinforcing phase is distributed in the foundation bolt, so that the stress of the foundation bolt is uniform, the overall bearing capacity of the foundation bolt is improved, and the mechanical property of the foundation bolt is improved.
Detailed Description
The technical solutions of the embodiments of the present invention will be clearly and completely described below in conjunction with the embodiments of the present invention, and it is apparent that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by one of ordinary skill in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
In the following examples and comparative examples, the Mn content in the ferromanganese alloy was 75wt%, the V content in the ferrovanadium alloy was 80wt%, the W content in the ferrotungsten powder was 70wt%, the Sn content in the ferrotin alloy was 50wt%, the Cu content in the copper-iron alloy was 85wt%, the Fe content in the scrap steel was 97.3wt%, the Se content in the ferroselenium alloy was 52wt%, the median particle diameter of the tungsten powder was 150nm, the median particle diameter of the molybdenum powder was 100nm, and the median particle diameter of the boron nitride was 10. Mu.m.
Example 1
A high-strength foundation bolt comprises a matrix and a reinforcing phase in a weight ratio of 100:2, wherein the matrix comprises the following components in percentage by weight, namely, C0.2%, mn 0.24%, V0.12%, W0.05%, sn 0.14%, cu 0.018%, se 0.018%, P0.005%, S0.005% and the balance of iron and unavoidable impurities thereof;
the reinforcing phase is boron nitride;
the preparation method comprises the following steps:
S1, weighing, mixing and smelting ferromanganese alloy, ferrovanadium alloy, ferrotungsten powder, ferrotin alloy, selenium-iron alloy, copper-iron alloy and scrap steel according to the weight percentage of a matrix to obtain molten steel;
S2, adding boron nitride into the molten steel, uniformly mixing, casting and forming to obtain a bolt blank;
S3, drawing the bolt blank, cold heading to form, carrying out heat treatment at 650 ℃ for 2 hours after thread machining treatment, and cooling to obtain the foundation bolt.
Example 2
A high-strength foundation bolt comprises a matrix and a reinforcing phase in a weight ratio of 100:4, wherein the matrix comprises the following components in percentage by weight of C0.29%, mn 0.3%, V0.15%, W0.1%, sn 0.276%, cu 0.042%, se 0.042%, P0.025%, S0.025% and the balance of iron and unavoidable impurities thereof;
the reinforcing phase is boron nitride;
the preparation method comprises the following steps:
S1, weighing the components of ferromanganese alloy, ferrovanadium alloy, ferrotungsten powder, ferrotin alloy, selenium-iron alloy, copper-iron alloy and scrap steel according to the weight percentage of a matrix, mixing, and smelting to obtain molten steel;
S2, adding boron nitride into the molten steel, uniformly mixing, casting and forming to obtain a bolt blank;
S3, drawing the bolt blank, cold heading to form, carrying out heat treatment at 750 ℃ for 1.5 hours after thread machining treatment, and cooling to obtain the foundation bolt.
Example 3
A high-strength foundation bolt comprises a matrix and a reinforcing phase in a weight ratio of 100:5, wherein the matrix comprises the following components in percentage by weight of C0.38%, mn 0.35%, V0.18%, W0.15%, sn 0.28%, cu 0.15%, se 0.15%, P0.055%, S0.045% and the balance of iron and unavoidable impurities thereof;
the reinforcing phase is boron nitride;
the preparation method comprises the following steps:
S1, weighing the components of ferromanganese alloy, ferrovanadium alloy, ferrotungsten powder, ferrotin alloy, selenium-iron alloy, copper-iron alloy and scrap steel according to the weight percentage of a matrix, mixing, and smelting to obtain molten steel;
S2, adding boron nitride into the molten steel, uniformly mixing, casting and forming to obtain a bolt blank;
S3, drawing the bolt blank, cold heading to form, carrying out heat treatment at 850 ℃ for 1h after thread machining treatment, and cooling to obtain the foundation bolt.
Example 4
The difference between this example and example 2 is that in this example, the weight percentage of Cu added was 0.1%, the weight percentage of Se added was 0.1%, and the weight percentage of Sn added was 0.16%.
Example 5
The difference between this example and example 2 is that in this example, the weight percentage of Cu added was 0.045%, the weight percentage of Se added was 0.045%, and the weight percentage of Sn added was 0.27%.
Example 6
The difference between this example and example 2 is that in this example, the weight percentage of Cu added was 0.09%, the weight percentage of Se added was 0.09%, and the weight percentage of Sn added was 0.18%.
Example 7
The difference between this example and example 6 is that in this example, boron nitride is modified boron nitride, and the preparation method includes the steps of mixing 90 parts of boron nitride and 2 parts of tungsten powder, hot-pressing and sintering for 3 hours at 1500 ℃ and 15MPa, and pulverizing to obtain modified boron nitride.
Example 8
The difference between this example and example 6 is that in this example, the boron nitride is modified boron nitride, and the preparation method includes the steps of mixing 90 parts of boron nitride and 2 parts of molybdenum powder, hot-pressing and sintering for 2 hours at 1600 ℃ and 25MPa, and pulverizing to obtain modified boron nitride.
Example 9
The difference between this example and example 6 is that in this example, boron nitride is modified boron nitride, and the preparation method includes the steps of mixing 90 parts of boron nitride, 1 part of tungsten powder and 1 part of molybdenum powder, hot-pressing and sintering at 1550 ℃ and 20MPa for 2.5 hours, and pulverizing to obtain modified boron nitride.
Example 10
This example differs from example 9 only in that in this example, 5 parts of tungsten powder was added.
Example 11
The difference between this example and example 9 is that 2 parts of tungsten powder was added in this example.
Example 12
This example differs from example 9 only in that in this example, 4 parts of tungsten powder was added.
Comparative example 1
The comparative example differs from example 1 only in that in the comparative example, no Se was added, the weight percentage of Cu added was 0.036%, and the weight percentage of Sn added was 0.14%.
Comparative example 2
The comparative example differs from example 1 only in that in the comparative example, cu was not added, the weight percentage of Se added was 0.036%, and the weight percentage of Sn added was 0.14%.
Comparative example 3
The comparative example differs from example 1 only in that Cu and Se were not added and that Sn was added in an amount of 0.176% by weight.
Comparative example 4
The comparative example differs from example 1 only in that in the comparative example, sn was not added, the weight percentage of Cu added was 0.088%, and the weight percentage of Se added was 0.088%.
Comparative example 5
The comparative example differs from example 1 only in that in this comparative example, cu, se and Sn were not added.
Comparative example 6
The comparative example differs from example 1 only in that in this comparative example, the boron nitride reinforcing phase was not added.
The anchor bolts prepared in examples 1 to 12 and comparative examples 1 to 6 were tested for tensile strength and yield strength according to the test method in GB/T228.1-2021 section 1 Metal Material tensile test: room temperature test method, wherein the test speed was 0.004s -1, and each group of test results was an average value of 5 samples.
Table 1 mechanical test results of examples 1 to 12 and comparative examples 1 to 6
Compared with comparative examples 1-5, the tensile strength and the yield strength of the foundation bolt are obviously improved, and the tensile strength, the yield strength and the yield strength of the foundation bolt are obviously improved, so that when three elements Cu, se and Sn are introduced into the foundation bolt matrix, the three elements have synergistic effect, and the mechanical properties of the foundation bolt can be obviously improved. The tensile strength and yield strength of example 1 are significantly improved compared to comparative example 6, indicating that the addition of the boron nitride reinforcing phase also improves the mechanical properties of the anchor bolt.
Compared with examples 2 and 4, the tensile strength and the yield strength of examples 5-6 are improved, which indicates that the mechanical properties of the foundation bolt can be further improved when the weight ratio of Cu to Se to Sn is 1-3:3.
Compared with examples 6-8, the tensile strength and the yield strength of examples 9-12 are improved, which shows that the mechanical properties of the foundation bolt can be further improved by modifying the boron nitride by using tungsten powder and molybdenum powder together. Compared with examples 9-10, the tensile strength and the yield strength of examples 11-12 are improved, and when the weight ratio of the boron nitride to the tungsten powder to the molybdenum powder is 90:2-4:1, the mechanical properties of the foundation bolt are further improved.
The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, alternatives, and improvements that fall within the spirit and scope of the invention.
Claims (10)
1. The high-strength foundation bolt comprises a matrix and a reinforcing phase, and is characterized in that the matrix consists of ：C 0.2%~0.38%、Mn 0.24%~0.35%、V 0.12%~0.18%、W 0.05%~0.15%、Sn 0.14%~0.28%、Cu 0.018%~0.15%、Se 0.018%~0.15%、P≤0.055%、S≤0.045%, parts by weight of iron and unavoidable impurities;
the reinforcing phase is boron nitride;
The weight ratio of the matrix to the reinforcing phase is 100:2-5.
2. The high strength anchor bolt of claim 1, wherein the weight ratio of the sum of the weights of Cu and Se to Sn is 1-3:3.
3. The high strength anchor bolt of claim 2, wherein the Cu and Se are present in a weight ratio of 1:1.
4. The high strength anchor bolt of claim 1, wherein the median particle size of the boron nitride is 200nm to 10 μm.
5. The high strength anchor bolt of claim 1, wherein the boron nitride is modified boron nitride, and the raw materials of the modified boron nitride include boron nitride, tungsten powder and molybdenum powder.
6. The high strength anchor bolt of claim 5, wherein the weight ratio of boron nitride to tungsten powder to molybdenum powder is 90:2-4:1.
7. The high-strength anchor bolt of claim 5, wherein the method for preparing the modified boron nitride comprises the steps of mixing the boron nitride, the tungsten powder and the molybdenum powder, hot-pressing, sintering and crushing to obtain the modified boron nitride.
8. The high strength anchor bolt of claim 7, wherein the hot press sintering is performed at a temperature of 1500-1600 ℃, a pressure of 15-25 mpa, and a time of 2-3 hours.
9. The method for manufacturing a high-strength anchor bolt according to any one of claims 1 to 8, comprising the steps of:
S1, weighing materials according to the weight percentage of the matrix, mixing, and smelting to obtain molten steel;
S2, adding the reinforcing phase into the molten steel, uniformly mixing, casting and forming to obtain a bolt blank;
And S3, carrying out drawing, cold heading forming, thread processing and heat treatment on the bolt blank, and cooling to obtain the foundation bolt.
10. The method for manufacturing a high-strength foundation bolt according to claim 9, wherein in the step S3, the temperature is 650-850 ℃ and the time is 1-2 hours during the heat treatment.
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| CN202510044434.XA CN119800229B (en) | 2025-01-11 | 2025-01-11 | A high-strength anchor bolt and its preparation method |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0320441A (en) * | 1988-11-22 | 1991-01-29 | Nippon Steel Corp | Salt-resistant reinforcing bar for preventing deterioration of concrete |
| CN1847442A (en) * | 2005-03-29 | 2006-10-18 | 日立粉末冶金株式会社 | Wear-resistant sintered part and method of manufacturing the same |
| US20130189146A1 (en) * | 2012-01-19 | 2013-07-25 | Gesenkschmiede Schneider Gmbh | Low-alloyed steel and components made thereof |
| JP2014111807A (en) * | 2012-12-05 | 2014-06-19 | Jfe Steel Corp | Steel material having excellent alcohol corrosion resistance |
| CN107620342A (en) * | 2017-09-22 | 2018-01-23 | 南通欧特建材设备有限公司 | A kind of drill steel |
| CN119243044A (en) * | 2024-10-12 | 2025-01-03 | 河北励泰金属制品有限公司 | A high-strength seismic support steel and its preparation method and application |
-
2025
- 2025-01-11 CN CN202510044434.XA patent/CN119800229B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0320441A (en) * | 1988-11-22 | 1991-01-29 | Nippon Steel Corp | Salt-resistant reinforcing bar for preventing deterioration of concrete |
| CN1847442A (en) * | 2005-03-29 | 2006-10-18 | 日立粉末冶金株式会社 | Wear-resistant sintered part and method of manufacturing the same |
| US20130189146A1 (en) * | 2012-01-19 | 2013-07-25 | Gesenkschmiede Schneider Gmbh | Low-alloyed steel and components made thereof |
| JP2014111807A (en) * | 2012-12-05 | 2014-06-19 | Jfe Steel Corp | Steel material having excellent alcohol corrosion resistance |
| CN107620342A (en) * | 2017-09-22 | 2018-01-23 | 南通欧特建材设备有限公司 | A kind of drill steel |
| CN119243044A (en) * | 2024-10-12 | 2025-01-03 | 河北励泰金属制品有限公司 | A high-strength seismic support steel and its preparation method and application |
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