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Tempering hardness conversion method of P92 steel

A technology of tempering hardness and hardness, applied in the field of heat treatment of P92 steel, can solve the problems of damage to the workpiece, the influence of other factors such as steel grades, and the deviation of hardness conversion, to achieve the effect of reducing differences

Inactive Publication Date: 2017-02-01
STATE GRID CORP OF CHINA +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Benefits of technology

This patented technology helps measure how well brinsells are made from certain materials like p 92 steels or other metals. It also shows that these measurements have different levels of difficulty for achieving this goal compared with others due to factors such as manufacturing process variations during production. By measuring their resistance against impacting objects, it provides an objective way to determine if they meet specific standards set forth beforehand.

Problems solved by technology

This patented technical problem addressed in this patents relates to improving upon existing methods that use brine or water to cool super critical equipment like nuclear power plants during operation without damaging them.

Method used

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  • Tempering hardness conversion method of P92 steel
  • Tempering hardness conversion method of P92 steel
  • Tempering hardness conversion method of P92 steel

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Embodiment 1

[0023] The present embodiment provides a tempering hardness conversion method of P92 steel, which comprises the following steps:

[0024] (1), at the same position of P92 steel pipe, intercept a plurality of test pieces (10 test pieces in total in the embodiment, respectively marked as M0-M7, M0B1, M0B2), the thickness of the test piece is 30mm; After the normalizing process, the tempering temperature and time are adjusted to perform different tempering treatments to obtain P92 steel specimens with different tempering hardness; the heat treatment parameters of the above ten specimens are as follows 1.

[0025] Table 1

[0026]

[0027]

[0028] (2), after carrying out normalizing process treatment and tempering treatment, after adopting sandpaper and polishing machine to carry out grinding and polishing respectively to the P92 steel specimen surface that step (1) obtains, adopt desktop Brinell hardness tester to measure this P92 The actual Brinell hardness (HBW) of the...

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Abstract

The invention provides a tempering hardness conversion method of P92 steel. The method comprises the following steps: intercepting a plurality of test samples in the same position of a P92 steel pipe, and after carrying out normalizing treatment on the test samples, carrying out different tempering treatment processes by regulating the tempering temperature and time, thereby obtaining P92 steel test samples with different tempering hardnesses; after respectively carrying out grinding and polishing on the obtained P92 steel test sample surface, measuring the actual Brinell hardness of the P92 steel test sample by a table Brinell hardness tester, and measuring the Brinell hardness of the P92 steel test sample by a Leeb hardness tester; establishing an HBHLD-HBW comparison diagram by using the measured Brinell hardness as the vertical coordinates and the actual Brinell hardness as the horizontal ordinates, and carrying out linear regression to obtain a linear relation HBHLD=20.6+0.84*HBW; and after measuring the Brinell hardness of the P92 steel test sample by the Leeb hardness tester, obtaining the actual Brinell hardness of the measured P92 steel test sample according to the linear relation.

Description

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Claims

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Application Information

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Owner STATE GRID CORP OF CHINA
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