摘要
介绍了国内外高强度钢筋的发展历史、生产技术进展和发展趋势。微合金化、余热处理、细晶化是发展高强度钢筋的有效途径。在微合金化钢筋方面，V—N钢筋具有明显的技术经济优势；通过利用廉价的氮元素，促进了V（C，N）的析出，显著提高了V的沉淀强化效果，可节约钒用量50％，达到了节约贵重合金资源、降低生产成本的目的。余热处理钢筋和细晶粒钢筋通过组织强化或利用超细晶技术，在碳素钢和20MnSi钢的基础上获得了400MPa的Ⅲ级钢筋和500MPa的Ⅳ级钢筋，减少了合金的消耗，节约了资源。为了提高建筑物安全性，国外开发了屈服强度685～980MPa级的超高强度抗震钢筋。在耐腐蚀钢筋领域，开发了高氮不锈钢钢筋，满足建筑物长寿命的要求。
The development history, technology progress and trend of high strength rebar in the world were reviewed. Microalloying, tempcore and ultrafine grain were the effective processes for developing high strength rebar. There was a marked cost-effectiveness for V-N process in all rebars microalloyed with V, Nb and Ti. Enhanced-nitrogen in V-containing rebar promoted precipitation of fine V（C, N） particles, and improved markedly precipitation strengthening effectiveness of vanadium. Therefore, V addition in V-N microalloyed rebars can be reduced by 50% compared with the same strength level of V-containing rebars. Tempcore and ultrafine grain processes could upgrade plain carbon steel and 20MnSi steel to reach to the requirements of grade 3 and grade 4 rehars.
出处
《钢铁》
CAS
CSCD
北大核心
2010年第11期1-11,共11页
Iron and Steel
关键词
高强度钢筋
钒氮微合金化
沉淀强化
余热处理
超细晶粒钢
抗震钢筋
不锈钢钢筋
high strength reinforcing bar
V-N microalloyed
precipitation strengthening
tempcore
ultrafine grain
anti-seismic rebar
stainless rebar
