Copper precipitation method for economical copper-containing microbiological corrosion resistant pipeline steel

Abstract

The invention relates to the field of copper-containing microbiological corrosion resistant pipeline steel, in particular to a copper precipitation method for economical copper-containing microbiological corrosion resistant pipeline steel. The economical copper-containing microbiological corrosion resistant pipeline steel consists of the following chemical components in percentage by weight: greater than 0% and smaller than 0.1% of C, greater than 0% and smaller than 0.50% of Si, greater than 0% and smaller than 2.0% of Mn, smaller than 0.003% of S, smaller than 0.008% of P, greater than 0.5%and smaller than 4.0% of Cu, greater than 0% and smaller than 2.0% of Ni, smaller than 1.0% of Mo, smaller than 1.0% of Cr, smaller than 0.1% of Nb, smaller than 0.1% of V, smaller than 0.1% of Ti, smaller than 0.1% of Al, smaller than 0.2% of Ce, and the balance of Fe and inevitable impurities. Copper-containing pipeline steel adopting the components is subjected to relaxation treatment after being subjected to hot-rolling, so that solid solution Cu in the steel is precipitated in an induction form, and therefore, the cost decreasing and benefit increasing purposes are realized while relatively good microbiological corrosion resistance is achieved. A production process for the copper-containing microbiological corrosion resistant pipeline steel treated by the method does not need extra aging thermal treatment.

Description

technical field [0001] The invention relates to the field of copper-containing microbial corrosion-resistant pipeline steel, in particular to an economic copper-containing microbial corrosion-resistant pipeline steel copper precipitation method. Background technique [0002] Copper-containing microbial corrosion-resistant pipeline steel is a new type of steel material developed to solve the problem of pipeline failure caused by microbial corrosion. It uses the continuous dissolution of trace Cu ions in steel to show strong, broad-spectrum and long-lasting microbial corrosion resistance. This new type of pipeline steel is expected to become an ideal steel material for buried pipelines integrating structure and function. However, in order to achieve better microbial corrosion resistance of copper-containing microbial corrosion pipeline steel, an additional aging heat treatment process is required after the rolling phase transformation is completed to precipitate sufficient nan...

AI Technical Summary

Problems solved by technology

However, in order to achieve better microbial corrosion resistance of copper-containing microbial corrosion pipeline steel, an additional aging heat treatment process is required after the rolling phase transformation is completed to precipitate sufficient nano-sized copper-rich phases in the matrix, which makes copper-containing anti-microbial corrosion Microbial corrosion of pipeline steel increases the production process in industrial production, reduces production efficiency, and increases production costs

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