Hot-rolled U shaped metal sheet pile and microalloying production method

Abstract

The invention relates to a hot-rolled U-shaped steel sheet pile and a micro-alloying production method thereof, which belong to the field of iron and steel metallurgy and materials. The chemical components of the steel have the following mixture ratio by weight percent: 0.12-0.26 of C, 0.6-1.8 of Mn, 0.25-0.60 of Si, 0.020 or less of P, 0.020 or less of S, 0.010-0.050 of Als, 0.01-0.20 of V and 0.005 or less of N. The method sequentially comprises the steps of converter or electric furnace smelting, secondary refining, continuous casting, heating and rolling. The invention enhances the comprehensive performance of the steel sheet pile, improves the welding performance of the steel sheet pile, improves the utility ratio of the steel sheet pile and has simple production technology.

Description

technical field

[0001] The invention relates to a hot-rolled U-shaped steel sheet pile and a microalloying production method thereof, belonging to the field of iron and steel metallurgy and materials. Background technique

[0002] Steel sheet piles began to be produced in Europe at the beginning of the 20th century. In 1903, Japan imported them for the first time and adopted them in the soil retaining construction of Mitsui Honkan. Based on the special performance of steel sheet piles, in 1923, Japan used a large number of them in the restoration project of the Great Kanto Earthquake. Import adopted. Due to the large market potential and development prospects of steel sheet piles, production began in Japan in 1931. At present, the annual consumption of steel sheet piles in the world has reached 2.5-3 million tons, including about 800,000 tons in Japan and 1.4 million tons in Europe and the United States. In the 1950s, my country first imported and used it from the former S...

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