北京科技大学学报Issue(11)：1472-1477,6.
卷取温度对Ti微合金化高强钢力学性能的影响机理
Effect of coiling temperature on the mechanical properties of Ti-microalloyed high strength steel
霍向东 1毛新平 2董锋1
作者信息
- 1. 江苏大学材料科学与工程学院，镇江 212013
- 2. 广州珠江钢铁有限责任公司，广州 510730
- 折叠
摘要
Abstract
Keeping chemical composition and other parameters unchanged, the effects of coiling temperature (625 and 579℃) on the microstructure and properties of Ti-microalloyed high strength steel were investigated during compact strip production (CSP). Experimental results of mechanical properties show that compared with steel strips coiled at 625 ℃, the yield strength of steel strips coiled at 579 ℃ decreases by 205 MPa, but the impacting energy at -20 ℃increases from 11.7 J to 47 J. Optical microscopy and electron microscopy were used to study the microstructure and precipitates in the steel. It is found that the primary microstructural constituent of steel strips coiled at 625℃is ferrite grains, but the microstructure of steel strips coiled at 579℃is finer and characterized with bainite grains. The volume fraction of nanometer carbides in steel strips significantly reduces with decreasing coiling temperature, which weakens the precipitation hardening effect and causes a marked reduction of strength. However, the toughness is improved due to grain refinement and volume fraction decreasing of precipitates. Coiling temperature needs to be strictly controlled, because it is a more important parameter of producing Ti-microalloyed high strength steel.关键词
高强钢/微合金化/钛/卷取温度/纳米颗粒/碳化物/材料强度/韧性Key words
high strength steel/microalloying/titanium/coiling temperature/nanoparticles/carbides/strength of materials/toughness分类
矿业与冶金引用本文复制引用
霍向东,毛新平,董锋..卷取温度对Ti微合金化高强钢力学性能的影响机理[J].北京科技大学学报,2013,(11):1472-1477,6.
