Hot-rolled steel plate residual stress calculating method suitable to production field

A calculation method, hot-rolled steel plate technology, applied in the direction of measuring force, measuring device, instrument, etc., can solve the problems of unsatisfactory test results, large additional stress, no quantitative calculation and analysis, etc., and achieve intuitive and reliable calculation results. The effect of simple mathematical model and simple measurement operation method

Active Publication Date: 2012-12-12
SHOUGANG CORPORATION
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Problems solved by technology

However, due to limited conditions at the production site, flame or shear cutting is often used to cut the sample, which will bring greater additional stress to the test, making the test results not very ideal
Moreover, since there is no suitable mathematical model for quantitative calculation and analysis of residual stress on the measured sample deformation data after segmentation

Method used

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  • Hot-rolled steel plate residual stress calculating method suitable to production field
  • Hot-rolled steel plate residual stress calculating method suitable to production field
  • Hot-rolled steel plate residual stress calculating method suitable to production field

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Embodiment Construction

[0025] In order to deeply understand the present invention, the present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0026] The calculation method for the residual stress of the hot-rolled steel plate suitable for the production site provided by the present invention is based on sampling the hot-rolled strip after straightening and cutting the sample so that it becomes a narrow strip of strip steel. The calculation formula is

[0027] σ R = 8 · Δx · E · d L 2

[0028] in,

[0029] σ R , the residual stress of the hot-rolled steel plate,

[0030] △x, the width of strip strip, see attached figure 1 or attached figure 2 ,

[0031] E, the modulus of elasticity of the strip,

[0...

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Abstract

The invention discloses a hot-rolled steel plate residual stress calculating method suitable to production field, belonging to the technique field of the hot-rolled steel plate residual stress calculating method. The calculating method is realized by the steps of sampling straightened hot-rolled strip steel and cutting the sample to be narrow strip steel, wherein a calculating formula is Sigma R=8*Delta x*E*d1/L<2>, the measurement of parameters delta x, d1 and L is simple in the operating method and low in technical requirements, and E is determined by the self-owned properties of the strip steel. The calculating method has a simple mathematical model and intuitive and reliable in the calculating result.

Description

technical field [0001] The invention relates to the technical field of calculation methods for residual stress of hot-rolled steel plates, in particular to a calculation method for residual stress of hot-rolled steel plates suitable for production sites. Background technique [0002] Plates and strips are widely used in all aspects of industry, agriculture, national defense and daily life, and play an important role in the development of the national economy. With the rapid development of some modern industrial sectors such as automobiles, cans and household appliances, not only the demand for plates and strips has increased sharply, but also strict requirements have been put forward for the quality of their plates. [0003] Residual stress is the stress that exists inside the member and remains in balance throughout the member when there is no working load on it. The existence of residual stress will affect the formability of the sheet metal and the final shape quality of ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N19/00G01L1/00
Inventor 王晓东李飞金永春江潇孙常库马耀峰
Owner SHOUGANG CORPORATION
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