摘要
采用DIL402C热膨胀仪和Gleeble-1500D热模拟试验机,测试了Q450NQR1钢(%:0.05~0.10C、0.30~0.50Si、0.80~1.00Mn、0.20~0.30Cu、0.15~0.35Ni、0.40~0.60Cr)200 mm×1 350 mm铸坯的热膨胀性能和高温力学性能。结果表明,升-降温速率由5℃/min提高至10℃/min时,升温相变温度区间上移,降温相变区间下移;Q450NQR1钢连铸坯二次脆性区为750~1 050℃,铸坯的矫直温度应≥1 050℃。
Thermal expansion characteristics and elevated temperature mechanical properties of 200 mm × 1 350 mm casting slab of steel Q450NQR1 ( % : 0. 05 - 0. 10C, 0. 30 - 0. 50Si, 0. 80 - 1.00Mn, 0. 20 - 0. 30Cu, 0. 15 - 0. 35Ni, 0. 40 -0. 60Cr) have been examined by using thermal expansion tester DIL402C and thermal simulater Gleeble-1500D. Results show that with increasing heating and cooling rate from 5 ℃/min to 10 ℃/min, the heating phase transformation region moves up and the cooling phase transformation region moves down; the secondary brittleness zone of casting slab of steel 0450NOR1 is 750 - 1 050 ℃ , therefore the straightening temperature of slab should be ≥ 1 050 ℃.
出处
《特殊钢》
北大核心
2010年第3期54-56,共3页
Special Steel
基金
国家自然科学基金资助(50774105)
2009年高等学校博士学科点专项科研基金资助(20090191110012)
关键词
Q450NQR1高强度耐候钢
热膨胀性能
热塑性
High Strength Weather-Resisting Steel Q450NQR1, Thermal Expansion Characteristic, Thermoplasticity