Towards Developing HIC-Resistant X70 Pipeline Grade Steel for Sour Service Applications

致力于开发适用于酸性工况应用的抗 HIC X70 管道级钢

• 批准号: 531165-2018
• 负责人: Kish, Joseph
• 金额: $ 3.5万
• 依托单位: McMaster University
• 依托单位国家: 加拿大
• 项目类别: Collaborative Research and Development Grants
• 财政年份: 2019
• 资助国家: 加拿大
• 起止时间: 2019-01-01 至 2020-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=689743
• 关键词: Towards; Developing; HIC; Resistant; X70

This proposal addresses the development of hydrogen-induced cracking (HIC)-resistant Ca-treated X70 pipeline grade steel for sour service oil/gas applications. The industry's need for improved HIC-resistance, in addition to higher strength and toughness as key performance properties in pipeline grade steels, is driven by the continued demand for the transportation of oil/gas products by steel pipelines coupled with the ongoing change in the oil/gas reserves (supply) from "sweet" to "sour" (H2S-containing). HIC is a brittle material fracture mode that occurs at stresses below the yield (permanent deformation) stress and involves the ingress of atomic hydrogen (H) and associated trapping at internal sites as necessary events. Internal trap sites span many length scales, ranging from constituent phase boundaries (observable using light optical microscopy) down to nanometer-sized strengthening intermetallic particles (observable using transmission electron microscopy). Individual H trap sites will first be spatially isolated and then linked to local HIC susceptibility via micro-mechanical testing (nano-indentation measurements) of micro-cantilever beams, with and without a H charging pre-treatment applied. The value of the research from a practical perspective is a science-based construction of a relative scale ranking the HIC susceptibility of individual internal trap sites. Such a ranking is vital to identify the more critical internal trap sites for the subsequent engineering of process modifications designed to control the deleterious effect of such traps. The results of this research will have medium to long term impact on: (i) sour service pipeline grade steel product development for Canadian steelmakers and (ii) operating reliability, integrity and safety of new and/or refurbished Canadian oil/gas transmission pipeline systems.

该提案介绍了氢诱导的开裂（HIC）耐药的CA处理的X70管道级钢，用于酸化油/天然气应用。该行业需要改善HIC耐药性，除了较高的强度和韧性，作为管道级钢的关键性能特性，还受到钢管管道对油/天然气产品运输的持续需求以及油的持续变化的驱动。 /天然气储量（供应）从“甜”到“酸”（含H2S）。 HIC是一种脆性材料断裂模式，其应力以低于产率（永久变形）应力的应力，涉及原子氢（H）的入口以及必要事件在内部位点的相关捕获。内部陷阱位点跨越了许多长度尺度，范围从构成相边界（可观察到光学显微镜观察）到纳米大小的增强金属间颗粒（可使用透射电子显微镜观察）。单个H陷阱位点将首先在空间上分离出来，然后通过微机械测试（纳米识别测量值）的微型机械梁束链接到局部HIC敏感性，并使用HH充电预处理。从实际角度来看，研究的价值是基于科学的构造，对各个内部陷阱站点的HIC敏感性排名相对规模。这样的排名对于确定旨在控制此类陷阱的有害影响的过程修改工程的更为关键的内部陷阱站点至关重要。这项研究的结果将对：（i）加拿大钢铁制造商的酸味服务级钢铁产品开发以及（ii）新的和/或翻新的加拿大加拿大油/天然气传输管道系统的运营可靠性，完整性和安全性。