回火温度对含钒低碳微合金钢组织和性能的影响.pdf

27 6 Vol. 27 No. 6 2003 6 Mat rials for M chanical Engin ring Jun. 2003 , , , ( 宝山钢铁股份有限公司, 上海201900) : 研究了含钒低碳微合金钢经过不同温度回火的 能和组织的变化关系数据表明, 回 火温度对钢的组织有 一定的影响, 在630 左右回火显微组织较佳, 随着回火温度的提高, 其强度 和硬度随之降低, 但在600~ 630 回火因有细小碳( 氮) 化钒析出, 使其强度硬度和冲击韧度都 有一定的回升 : 钒; 低碳微合金钢; 回火 : TG142. 41 : A : 1000-3738( 2003) 06-0037-03 Effect of Tempering Temperature on Properties and Microstructure of Low Carbon Microalloyed Steel with Vanadium YAN i, HUANG Z-i yang, CHENG S-i xiao, HUA Wei ( Baoshan Iron and St l Corp, Shanghai 201900, China) Abstract: Th variation of prop rti s and microstructur of th low carbon microalloy d st l with vanadium was analyz d aft r t mp ring at diff r nt t mp ratur s. Th r sults show that t mp ring t mp ratur can ff ctiv ly aff ct th microstructur of th low carbon st l with vanadium. It has th optimiz d microstructur at 630 . Th str ngth and hardn ss of th mat rial d- cr as with th incr as of t mp ring t mp ratur . How v r, th str ngth, hardn ss and toughn ss ar improv d from 600 to 630 with th pr cipitation of V carbid . Key words: vanadium; low carbon microalloy d st l; t mp ring 1 1 1 (, %) Tab.1 The chemical compositionof thematerial (mass, %) , C Si Mn P S V Al N , 0. 08 0. 28 1.38 0. 014 0.008 0. 20 0. 24 0. 01 , , 50kg , 1 200 150mm 500mm , , [ 1] 60mm , 950~ 1 100 , 20mm