CAJ | 학술논문

基于国内油气工业管线应用需要，采用控轧控冷工艺，研制了强韧性匹配优良的2%Cr低合金管线钢，并测试了其组织和力学性能。以针状铁素体和多边形铁素体为主的含2%Cr管线钢具有良好的强韧性组合。采用高温高压冷凝釜模拟湿气管线中的CO2顶部腐蚀环境试验方法，研究含2%Cr低合金管线钢的抗CO2顶部腐蚀性能。相较于传统管线钢，添加2% Cr后，其CO2腐蚀产物膜是一层连续、致密的富Cr胶泥状非晶态产物膜，从而提高了其抗CO2顶部腐蚀性能。
기우국내유기공업관선응용수요，채용공알공랭공예，연제료강인성필배우량적2%Cr저합금관선강，병측시료기조직화역학성능。이침상철소체화다변형철소체위주적함2%Cr관선강구유량호적강인성조합。채용고온고압냉응부모의습기관선중적CO2정부부식배경시험방법，연구함2%Cr저합금관선강적항CO2정부부식성능。상교우전통관선강，첨가2% Cr후，기CO2부식산물막시일층련속、치밀적부Cr효니상비정태산물막，종이제고료기항CO2정부부식성능。
Based on the need for pipeline steel in the oil and gas industry of China, a novel 2% Cr pipeline steel with good matched strength and toughness was developed through a reasonable thermomechanical control process (TMCP). Its mechanical proper-ties and microstructure were studied preliminarily and the results show that the 2% Cr pipeline steel mainly containing acicular ferrite and a few polygonal ferrites has a better combination of strength and toughness. The corrosion resistance of the 2%Cr pipeline steel was evaluated in the CO2 top-of-the-line corrosion environment in submarine wet gas pipelines which was simulated with a high temperature and high pressure condensation autoclave. Compared with traditional pipeline steel, adding 2% Cr makes obvious changes of corrosion behavior and a continuous and compact amorphous film with Cr enrichment forms, thus improving its CO2 corrosion resistance.