摘要
为满足490—590MPa级厚钢板使用中对焊接大线能量化、高强度厚板化、高韧性化的要求．开发出新的超越了已有技术界限的热影响区细晶高韧性化技术．从而可以得到韧性良好的热影响区。该技术旨在明显抑制熔合线附近热影响区内奥氏体晶粒长大，使高温热稳定性优良的氧化物或硫化物在钢中微细分散。通过显著细化奥氏体晶粒来微细化热影响区组织。技术要点是确定工业方法，使含有适量镁或钙、尺寸为数十纳米至数百纳米的钢中氧化物或硫化物密而分散。该技术适用于建筑、造船、海洋工程结构和石油管线用厚钢板，在确保焊接钢结构安全可靠基础上，提高焊接热影响区的韧性。
In order to produce high HAZ toughness steel plates with tensile strength of 490 MPa or 590 MPa class, the innovative technology for HAZ microstructure refinement, HTUFF, has been developed. Fine dispersion of oxides and/or sulfides in steel has been tried to retard r grain growth in the HAZ near a weld fusion line. It has been discovered that very small oxides and/or sulfides with sizes of several 10nm to several 100nm can be dispersed in steel by the appropriate addition of Mg and/of Ca into steel. Utilizing these fine particles containing Mg or Ca, the strong pinning technology to retard r grain on the concept of HTUFF providing plates have been mass-produced. growth in a HAZ has been commercially established. Based excellent HAZ toughness, high-performance structural steel
出处
《首钢科技》
2006年第4期41-44,47,共5页
Shougang Science and Technology
