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A method for manufacturing high-strength bolts resistant to marine atmospheric corrosion

A high-strength bolt and manufacturing method technology, applied in the field of alloy materials, can solve the problems of accelerated corrosion rate of metal materials, high concentration of chloride ions, complex environment, etc., and achieve excellent resistance to marine atmospheric corrosion

Active Publication Date: 2020-09-01
南京福贝尔五金制品有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Compared with the general atmospheric environment, the concentration of chloride ions in the marine atmospheric environment is higher, and the environment is more complex, which has caused certain resistance to the development of my country's marine field, and the harsh environmental factors have further accelerated the corrosion rate of metal materials.
Every year, metal corrosion in coastal areas will directly or indirectly bring serious economic losses to the country, and the traditional 42CrMo and 42CrMo4 bolt steels have poor marine atmospheric corrosion resistance and cannot meet the long-term use requirements of coastal areas. Therefore, the most effective way is to improve metal materials. Corrosion resistance of marine atmosphere

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] A high-strength bolt resistant to marine atmospheric corrosion, comprising the following components, in terms of mass percentage, C: 0.10; Si: 0.10; Mn: 0.30; P: 0.025; S: 0.01; Ni: 3.0; Cu: 0.20; Mo: 0.10; V: 0.10; Ti: 0.02: B: 0.001; Nb: 0.04; Als: 0.015; N: 0.009; W: 0.1; Zr: 0.015; [H]≤0.0002%, the balance is Fe.

[0029] A method for manufacturing high-strength bolts resistant to marine atmospheric corrosion, comprising the following steps:

[0030] S01, hot forging;

[0031] S02, Precipitation Phase Adjustment Treatment: Heat and hold the bolt formed by S01 at 1100°C for 45 minutes, and quickly air-cool after the heat preservation is completed, so that the fine second phase particles are fully and uniformly dispersed and precipitated on the structure matrix of the bolt;

[0032] S03, high-temperature quenching: high-temperature quenching is adopted after the precipitation phase adjustment treatment, heated at 960°C to austenitize, and oil quenched after holding ...

Embodiment 2

[0044] A high-strength bolt resistant to marine atmospheric corrosion, comprising the following components, in terms of mass percentage, C: 0.40; Si: 0.60; Mn: 1.20; P: 0.020; S: 0.005; Ni: 3.5; Cu: 0.70; Mo: 0.65; V: 0.05; Ti: 0.10: B: 0.003; Nb: 0.10; Als: 0.02; N: 0.018; W: 0.8; [H]≤0.0002%, the balance is Fe.

[0045] A method for manufacturing high-strength bolts resistant to marine atmospheric corrosion, comprising the following steps:

[0046] S01, spheroidizing annealing cold heading forming;

[0047] S02, Precipitation Phase Adjustment Treatment: Heat and hold the bolt formed by S01 at 1100°C for 45 minutes, and quickly air-cool after the heat preservation is completed, so that the fine second phase particles are fully and uniformly dispersed and precipitated on the structure matrix of the bolt;

[0048] S03, high-temperature quenching: high-temperature quenching is adopted after the precipitation phase adjustment treatment, heated at 960°C to austenitize, and oil q...

Embodiment 3

[0057] A high-strength bolt resistant to marine atmospheric corrosion, comprising the following components, in terms of mass percentage, C: 0.20; Si: 0.30; Mn: 0.80; P: 0.01; S: 0.001; Ni: 3.3; Cu: 0.50; Mo: 0.35; V: 0.010; Ti: 0.09: B: 0.002; Nb: 0.08; Als: 0.03; N: 0.015; W: 0.5; [H]≤0.0002%, the balance is Fe.

[0058] A method for manufacturing high-strength bolts resistant to marine atmospheric corrosion, comprising the following steps:

[0059] S01, hot forging;

[0060] S02, Precipitation Phase Adjustment Treatment: Heat and hold the bolt formed by S01 at 1150°C for 45 minutes, and quickly air-cool after the heat preservation is completed, so that the fine second phase particles are fully and uniformly dispersed and precipitated on the structure matrix of the bolt;

[0061] S03, high-temperature quenching: high-temperature quenching is adopted after the precipitation phase adjustment treatment, heated at 980°C to austenitize, and oil quenched after holding for 45 minu...

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Abstract

The invention discloses a high-strength bolt resistant to marine atmospheric corrosion. The high-strength bolt resistant to marine atmospheric corrosion comprises the following ingredients including,by mass percentage, 0.10 -0.40 of C, 0.10 -0.60 of Si, 0.30 -1.20 of Mn, not larger than 0.025 of P, not larger than 0.01 of S, 3.0-3.5 of Ni, 0.20- 0.70 of Cu, 0.10-0.65 of Mo, not larger than 0.10 of V, 0.02- 0.10 of Ti, 0.001 -0.003 of B, 0.04 -0.10 of Nb, not smaller than 0.015 of Als, 0.009 -0.018 of N, 0.1 -0.8 of W, 0.015 -0.045 of Zr. The invention also discloses a manufacturing method ofthe high-strength bolt resistant to marine atmospheric corrosion. The manufactured bolt has the tensile strength of 1075-1200 MPa, and has an excellent marine atmospheric corrosion resisting function.

Description

technical field [0001] The invention relates to a marine atmospheric corrosion-resistant high-strength bolt and a manufacturing method thereof, belonging to the technical field of alloy materials. Background technique [0002] With the continuous development of coastal areas, higher and higher requirements are put forward for the materials used in various fasteners (such as bolts, screws, nuts, etc.), such as high bolt strength and marine atmospheric corrosion resistance. Compared with the general atmospheric environment, the concentration of chloride ions in the marine atmospheric environment is higher and the environment is more complex, which has caused certain resistance to the development of my country's marine field, and the harsh environmental factors have further accelerated the corrosion rate of metal materials. Every year, metal corrosion in coastal areas will directly or indirectly bring serious economic losses to the country, and the traditional 42CrMo and 42CrMo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C38/16C22C38/14C22C38/12C22C38/08C22C38/06C22C38/04C22C38/02C21D1/18
CPCC21D1/18C22C38/001C22C38/002C22C38/02C22C38/04C22C38/06C22C38/08C22C38/12C22C38/14C22C38/16
Inventor 马金锁赵秀明侯华兴张先鸣黄华吴萌杨益春龚国强林田子谢家成许莉钧王桂娟王加杰
Owner 南京福贝尔五金制品有限公司