Manufacturing method of anti-yield foundation bolt

An anchor bolt and anti-yield technology, which is applied in the field of preparation of anti-yield anchor bolts, can solve the problems of easy rust and corrosion, fracture or crack, and the formation of accident sources, and achieve high bolt precision, good plasticity, and improved tensile strength. The effect of intensity

Active Publication Date: 2013-06-05
浙江同力重型机械制造有限公司
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AI Technical Summary

Problems solved by technology

In addition, when the bolts are in a relatively humid environment, they are prone to rust and

Method used

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Embodiment Construction

[0020] The present invention will be further described in conjunction with the following examples:

[0021] The preparation method of the anti-yield anchor bolt, the processing steps include:

[0022] a. Casting rod blank, the weight percentage of chemical composition in the rod blank is: 0.196%≤C≤0.250%, 0.20%≤Si≤1.90%, 0.35%≤Mn≤1.35%, 0.010%≤P≤0.030%, 0.010 %≤S≤0.030%, 1.50%≤Cr≤1.50%, trace ≤B≤0.0018%, 0.012%≤Cu≤0.030%, the balance is iron and unavoidable impurities; the temperature of the casting blank is reduced to 350°C , reheat to 670-780°C, hold for 3-5 hours, cool the furnace to 300°C, hold for 3 hours, reheat to 650-760°C, hold for 10 hours, cool to 400°C at 45°C / hour, and then cool at 25°C °C / hour, cooling to 150 °C;

[0023] b. The rod material after casting is pickled; according to the wire diameter requirements of the bolt, it is drawn to make the rod material shrink to the wire diameter required by the bolt; the rod material after shrinking the wire diameter C...

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Abstract

The invention discloses a manufacturing method of an anti-yield foundation bolt. A processing step includes: a, casting a rod blank, wherein the rod blank comprises chemical components, by weight, 0.196%<=C<=0.250%, 0.20%<=Si<=1.90%, 0.35%<=Mn<=1.35%, 0.010%<=P<=0.030%, 0.010%<=S<=0.030%, 1.50%<=Cr<=1.50%, trace amount <=B<=0.0018%, 0.012%<=Cu<=0.030% and the balance Ferrum and inevitable impurities; and cooling temperature of casting molded blank to 350 DEG C, heating to 670-780 DEG C, keeping warm for 3-5 hours, cooling a furnace to 300 DEG C, keeping warm for 3 hours, heating to 650-760 DEG C, keeping warm for 10 hours, cooling to 400 DEG C at 45 DEG C/hour, and cooling to 150 DEG C at 25 DEG C/hour. The manufacturing method of the anti-yield foundation bolt adopts cold extrusion technology bolt processing, improves strength of the bolt, reaches a hardness value and a strength value required by the anti-yield foundation bolt, solves delay breakage and fatigue breakage of the bolt under high strength, is reliable to connect in use and not prone to break, prolongs service life of the bolt, and meets using requirements of various industries in society on high-strength bolts.

Description

technical field [0001] The invention relates to a bolt processing method, in particular to a preparation method of yield-resistant anchor bolts. Background technique [0002] Anchor 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-turns and rod fractures occur during use, which is very harmful to industrial production. Therefore, it plays an important role in the development of technology and economy to study and improve the production method of high-strength bolts to ensure the quality stability of high-strength bolts. In addition, when the bolts are in a relatively humid environment, they are prone to rust and corrosion, eventually leading to breakage or cracks, forming a potential source of accidents. [0003] In view of this, it is necessary to provide a method for preparing anchor bolts to produce high-streng...

Claims

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Application Information

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IPC IPC(8): B23P15/00C22C38/32C23F17/00
Inventor 赵光明
Owner 浙江同力重型机械制造有限公司
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