CAJ | 학술논문

采用低C-Mn-Mo-Nb系为基础，添加适量钒、钛、镍、铜和铬等微合金元素的合金设计方法，利用洁净钢冶炼技术和TMCP轧制工艺，研制开发了X70高等级厚规格钢板。对钢板组织和力学性能分析表明：钢板组织为针状铁素体混合组织，晶粒细小均匀，夹杂少，带状组织轻微，析出物均匀弥散，具有高强度和良好的低温韧性。
채용저C-Mn-Mo-Nb계위기출，첨가괄량범、태、얼、동화락등미합금원소적합금설계방법，이용길정강야련기술화TMCP알제공예，연제개발료X70고등급후규격강판。대강판조직화역학성능분석표명：강판조직위침상철소체혼합조직，정립세소균균，협잡소，대상조직경미，석출물균균미산，구유고강도화량호적저온인성。
Adopting a alloy design process of lower C-Mn-Mo-Nb series with right amount of micro-alloy elements such as V, Ti, Ni, Cu and Cr, and using clean steel smelting process and TMCP rolling process, developed successfully X70 thick and high grade pipeline steel heat roll plate. The results of analysis on micro structure and mechanical property showed that its structure was acicular ferrite admixture with ting grain and little inclusion, its band structure was light, and the precipitate was uniform diffusion. The X70 grade pipeline steel has high strength and excellent low temperature toughness.