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Hardened and toughened nut

A screw and super-tough technology, applied in the direction of screws, nuts, bolts, etc., can solve the problems of insufficient bearing capacity, easy to break, low hardness, etc., and achieve the effect of significant social benefits, low cost, and high quality

Inactive Publication Date: 2006-11-01
徐尚仁
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As a result, the hardness is low, the bearing capacity is not enough, it is easy to wear, and the hardness is high, and it is easy to break, which is difficult to overcome. It seriously restricts the installation and use of screws in special requirements.

Method used

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Experimental program
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Embodiment Construction

[0013] The present invention will be further described below in conjunction with the accompanying drawings.

[0014] exist figure 1 The screw body 1 of the non-standard screw is respectively provided with a screw shank 2 , a screw shank thread 3 and a nail top 4 of a conjoined structure.

[0015] exist figure 2 The body 1 of the national standard screw is also provided with a screw shank 2 , a screw shank thread 3 and a nail top 4 with a conjoined structure.

[0016] Whether it is a non-standard screw or a national standard screw, it can be made of 20 chromium steel, 40 chromium steel or 20 chromium manganese titanium steel, or it can be made of 10 chromium manganese titanium steel with a carbon content of about 1‰; Hard on the outside and tough on the inside, no matter what kind of steel is used in the present invention, it can be quenched by heat treatment and quenching process or carburizing and quenching process in heat treatment.

[0017] The hardness and depth of the...

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PUM

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Abstract

The invention includes a screw body, a screw stem, screw stem threads and a screw top. The screw body or the partial screw body is made of Cr10 or Cr20 manganese-titanium steels, or Cr20 or Cr40 steels, and is three-quarter hard finished by the quenching or the cementation quenching process in the heat treatment. If the cementation quenching process is adopted, the screw body containing low carbon steel in the cemented depth is hardened to 46 deg. or above 46 deg. / 60 kilogram pressure hardness.

Description

technical field [0001] The invention relates to a fastener accessory fixedly installed on related mechanical equipment or parts thereof, more specifically, it is a superhard supertough screw. Background technique [0002] Known fastener screws that have been tempered and hardened through heat treatment are usually made of medium and high carbon steel materials, the hardness of which is below 45° / 60 kg pressure hardness, and the entire nail body is hardened at the same degree. Therefore cause hardness to be low bearing capacity is not enough, easily wear and tear, the contradiction that is difficult to overcome that hardness is high and easily breaks, it has restricted the installation and use of special requirement position screw seriously. Contents of the invention [0003] The purpose of the present invention is to overcome the deficiencies in the prior art and provide a technique of the present invention with simple process and wide application. [0004] The technical ...

Claims

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Application Information

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IPC IPC(8): F16B41/00C21D9/00C23C8/22F16B23/00F16B35/00
Inventor 徐尚仁
Owner 徐尚仁
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