Characteristics of Hot Ductility in Steels Containing Nb, Ti
The hot ductility was measured for a series of steels containing Nb and/or Ti with Gleeble-3500 thermo-mechanical simulator. It is found that the effect of austenitizing temperature on hot ductility of Nb-containing steel is significant. As the austenitizing temperature rises up, the shape of embrittling curve (SEC) from V-shape gradually changes to U-shape, and the range of embrittling temperature widens out and the embrittling degree deepens.The SEC of Nb-containing steel is U-shaped and the embrittling temperature range is about 600-1050℃. The initial temperature of embrittlement on the right is nearly independent of carbon content. The SEC of Ti-containing steel is N-shaped and two lowest points are at about 600℃ and the A-F transformation temperature. The SEC of Nb -Ti-containing steel is basically the superposition of two shapes mentioned above. The crack on straightening in continuous casting belongs to intergranular fracture, and the crack on rolling (crack expansion) belongs to transgranular fracture.
hot ductility crack Nb-containing steel Ti-containing steel
SONG Hai-wu QI Chang-fa AI Xing-hui
Technology Center of Tangshan Iron & Steel Group Company, Ltd., Tangshan 063016, China Department of Metallurgy, Tangshan Vocational College of Science and Technology, Tangshan 063001, Ch
国际会议
The 6th International Conference on High Strength Low Alloy Steels(第六届高强度低合金钢国际会议HSLA Steels2011)
北京
英文
664-667
2011-05-31（万方平台首次上网日期，不代表论文的发表时间）