High-strength anti-fatigue bolt alloy material and manufacturing method of bolt

Abstract

The invention discloses a high-strength anti-fatigue bolt alloy material and a manufacturing method of a bolt. The alloy material is prepared from the chemical element components in percentage by mass: less than or equal to 0.05 percent of C, less than or equal to 0.10 percent of Mn, less than or equal to 0.10 percent of Si, less than or equal to 0.010 percent of P, less than or equal to 0.008 percent of S, 12.25 percent to 13.25 percent Cr, 7.5 percent to 8.5 percent of Ni, 2.00 percent to 2.50 percent of Mo, 0.90 percent to 1.35 percent of AI, and less than or equal to 0.010 percent of N, and the balance Fe. The high-strength anti-fatigue bolt manufactured by the alloy material is high in strength and good in fatigue resistance.

Description

technical field [0001] The invention relates to an alloy material of a bolt, in particular to a high-strength anti-fatigue alloy material; the invention also relates to a manufacturing method of a high-strength anti-fatigue bolt. Background technique [0002] Bolt is an requisite part during daily life and in the middle of industrial production manufacture, and it is widely used in electronic product, mechanical product, digital product, electric power equipment, dynamo-electrical mechanical product. Ships and ships, vehicles, hydraulic engineering, even also use bolt in chemical experiment. With the rapid development of the economy, all walks of life have higher and higher requirements for bolts. In many demanding equipment (such as aviation aircraft), bolts are required to have high strength, high corrosion resistance and high fatigue resistance. At present, my country's high The anti-fatigue processing technology of high-strength steel bolts is still at a relatively low l...

AI Technical Summary

Problems solved by technology

With the rapid development of the economy, all walks of life have higher and higher requirements for bolts. In many demanding equipment (such as aviation aircraft), bolts are required to have high strength, high corrosion resistance and high fatigue resistance. At present, my country's high The anti-fatigue processing technology of high-strength steel bolts is still at a relatively low level, and the performance of existing material fasteners, especially the anti-fatigue performance, can no longer meet the requirements of use

[0003] The patent application number 201110049698 discloses an alloy steel for high-strength and high-toughness bolts and a preparation method thereof. The alloy steel includes the following alloy elements according to weight percentage: 0.15~0.23C; 0.10~0.35Si; 0.20~0.45Mn; P ≤ 0.03 ; S ≤ 0.025 ; 1.10~1.45Cr ; 3.30~3.90Ni ; 0.20~0.45Mo ; Cu≤0.05 ; Does not improve corrosion resistance and fatigue strength of bolts

[0004] The patent application No. 2015104610129 discloses a corrosion-resistant bolt alloy material and a method for manufacturing bolts, wherein the alloy material includes the following chemical components in terms of weight percentage: C 0.2-0.5%, Si 0.15-0.23%, Mn 0.05-0.15% %, P 0.02~0.04%, S 0.02~0.04%, Cu 0.1~0.14%, Co 0.24~0.32%, Ni 0.22~0.28%, Al 0.08~0.24%, Ti 0.12~0.26%, Mo 0.08~0.12%, V 0.1~0.15%, Sc 0.06~0.14%, Cr 0.04~0.1%, Nb 0.002~0.004%, NdFeB 0.08~0.14%, the balance is iron and impurity elements, the patented bolt has high strength and corrosion resistance Excellent, but still does not improve the fatigue strength of the bolt

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