M56*3 high-strength bolt production method

A technology of high-strength bolts and production methods, applied in the direction of furnaces, heat treatment equipment, heat treatment furnaces, etc., can solve problems such as difficulty in ensuring strength, broken rods, U-turns, etc., and achieve the effect of strong scalability and high hardness

Inactive Publication Date: 2013-06-26
郑州水野大一热处理技术有限公司
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Problems solved by technology

[0002] High-strength bolts are commonly used fasteners in the machinery industry. The current processing method is generally turning and forming, and the str

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[0007] In order to make the objectives, technical solutions and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention, but not to limit the present invention.

[0008] A method for producing M56×3 high-strength bolts, including: blanking, forging, rough machining, normalizing, quenching, tempering, finishing, threading, and surface chemical treatment; the normalizing temperature is 870-890 degrees The quenching temperature is: 850-860 degrees; the tempering temperature is: 510-530 degrees. The heat preservation time mentioned above is calculated in the normal way.

[0009] Optionally, the quenching medium is an inorganic water-based quenching medium.

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Abstract

The invention provides an M56*3 high-strength bolt production method comprising the steps of blanking, forging, rough processing, normalizing, quenching, tempering, finishing, thread processing, and surface chemical treatment. A normalizing temperature is 870-890 DEG C. A quenching temperature is 850-860 DEG C. A tempering temperature is 510-530 DEG C. With the M56*3 high-strength bolt production method provided by the invention, the produced bolt has high hardness, impact resistance, and high scalability.

Description

technical field [0001] The invention relates to a production method of M56×3 high-strength bolts. Background technique [0002] High-strength bolts are commonly used fasteners in the machinery industry. The current processing method is generally turning and forming, and the strength is often difficult to guarantee. Sometimes unsafe phenomena such as U-turn and rod breakage occur during use, which is harmful to industrial production. Therefore, researching and improving the production method of high-strength bolts to ensure the quality stability of high-strength bolts plays an important role in the development of technology and economy. Contents of the invention [0003] The object of the present invention is to provide a method for producing M56×3 high-strength bolts, the bolts produced have high hardness, impact resistance and strong scalability. [0004] A production method for M56×3 high-strength bolts, comprising: blanking, forging, rough machining, normalizing, quenc...

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Application Information

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IPC IPC(8): C21D9/00C21D1/18C21D1/28
Inventor 水野长俊
Owner 郑州水野大一热处理技术有限公司
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