Method for generating high-strength steel corrugated pipe

Abstract

The invention discloses a method for generating a high-strength steel corrugated pipe. The method comprises the following steps: 1, a to-be-machined area of a preset steel pipe is heated to a preset heating temperature, so that the to-be-machined area is austenitized; 2, the to-be-machined area is controlled to be in a heat preservation state for a preset heat preservation time period; 3, two endsof the preset steel pipe are axially pressurized, so that the to-be-machined area undergoes axisymmetric buckling deformation to form a corrugated contour; and 4, the to-be-machined area is cooled ata preset cooling speed, so that martensite transformation is performed on the tissue of the to-be-machined area to obtain the high-strength steel corrugated pipe, wherein the preset heating temperature range is 750-1000 DEG C, and the preset cooling speed is greater than 27 DEG C / s. According to the method, the cooling speed is limited by spraying a cooling medium in a formed corrugated area, sothat the ultra-high-strength corrugation pipe is obtained, and the problems that an existing formed corrugated pipe is insufficient in strength and prone to cracking are solved; and the method has high advantages in hardness, wear resistance, anti-collision energy absorption and the like.

Description

technical field [0001] The invention relates to the technical field of hot forming of metal pipes, in particular to a method for producing high-strength steel corrugated pipes. Background technique [0002] Metal bellows have excellent thermal expansion absorption performance and mechanical motion compensation ability, and can be used as compensation and vibration damping elements to absorb thermal expansion and contraction and dimensional changes caused by vibration. Adjustment and so on play an important role. [0003] Metal bellows are usually machined from straight pipes. Existing metal bellows forming methods mainly include hydraulic forming, mechanical forming, welding forming, high-pressure inflation forming and the like. However, the above-mentioned forming methods all have the following problems: First, the above-mentioned forming methods generally require complex forming devices and mold structures, and have high requirements on the tonnage of the press and the s...

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is that the corrugations formed by the existing metal bellows forming method have insufficient strength and are prone to rupture.

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