Method for acquiring tensile property parameter of steel plate for pipe manufacturing and steel plate selection method

Abstract

The invention belongs to the technical field of steel pipe manufacturing, discloses a method for acquiring a tensile property parameter of a steel plate for pipe manufacturing and a steel plate selection method, and aims to solve the problem that a steel pipe manufactured from a steel plate selected based on a strain standard value does not meet the yield strength requirement in the prior art. Themethod for acquiring the tensile property parameter of the steel plate for pipe manufacturing comprises the steps of: based on the pipe diameter D of a to-be-manufactured steel pipe, the width W of asteel plate before forming and the distance t0 from the center of a tensile sample to the outer surface of the steel pipe, acquiring average strain epsilon 1 of the steel pipe to be manufactured; andbased on the epsilon 1, delta epsilon and a compensation deformation quantity epsilon 2, acquiring a theoretical strain value epsilon of the steel plate for pipe manufacturing corresponding to the characteristic strain delta epsilon as the tensile property parameter of the steel plate for pipe manufacturing, wherein epsilon is equal to epsilon 1+ epsilon 2 + delta epsilon, and epsilon is greaterthan delta epsilon. According to the method, the epsilon is used for replacing delta epsilon to select the base metal of the to-be-manufactured steel pipe, and the qualification rate of tensile properties of steel plates and steel pipes can be greatly increased.

Description

technical field [0001] The invention belongs to the technical field of steel pipe preparation, and in particular relates to a method for obtaining tensile property parameters of a steel plate for pipe making and a method for selecting a steel plate. Background technique [0002] As an efficient and economical transportation method, pipeline is the main way of long-distance transportation of oil and gas. At present, my country has built more than 120,000 kilometers of oil and gas pipelines such as the West-East Gas Pipeline, the Second / Third / Fourth West-East Gas Pipeline, the China-Russia Crude Oil Pipeline, the Central Asia Pipeline, and the China-Myanmar Pipeline, but they still cannot meet my country's rapid demand for oil and gas. The construction of oil and gas pipelines is still in the stage of rapid development. The raw material of LSAW pipes for oil and gas pipelines is hot-rolled wide and thick plates. The main processes of pipe production include pre-bending, formin...

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Problems solved by technology

[0004] In order to solve the above-mentioned problems in the prior art, that is, in order to solve the problem in the prior art that steel pipes made of steel plates selected based on strain standard values ​​do not meet the yield strength requirements, the present invention provides a method for obtaining tensile performance parameters of steel plates for pipe making method, steel plate selection method

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