史显波
,
赵连玉
,
王威
,
曾波
,
赵立君
,
单以银
,
沈明钢
,
杨柯
材料热处理学报
研究了51CrV4、52CrMoV4、60Si2CrVA、60Si2MnA共4种高速列车常用弹簧钢的表面脱碳形貌,比较了脱碳敏感性大小.结果表明,Cr-V系弹簧钢具有较小的脱碳敏感性,Si-Mn系弹簧钢的脱碳倾向较大.在850 ～1050℃温度范围内,60Si2MnA的脱碳最严重,60Si2CrVA次之,51CrV4、52CrMoV4的脱碳敏感性最小.弹簧钢的化学成分对其脱碳行为有重要影响.
关键词:
弹簧钢
,
脱碳敏感性
,
51CrV4
,
52CrMoV4
,
60Si2CrVA
,
60Si2MnA
曾斌
,
李昭东
,
孙新军
,
杨俊伟
,
雍岐龙
钢铁
doi:10.13228/j.boyuan.issn0449-749x.20150255
51CrV4钢因具有良好的热处理性能与力学性能,广泛用作为高等级弹簧钢.为改善现有锯片钢的不足,根据51CrV4特有的化学成分,创新性地将其用于制造金刚石焊接锯片基体.通过研究动态CCT曲线,卷取温度对显微组织与第二相析出物的影响,淬火与回火工艺对碳化物尺寸、晶粒尺寸、力学性能的影响,评估了51CrV4钢用于制造金刚石焊接锯片基体的可行性.结果表明:卷取温度升高,先共析铁素体尺寸与珠光体片层间距变大,10nm粒径以下的(V,Cr)C析出物在MC相析出物中所占的比例减少;淬火温度由800提高到900℃时,奥氏体晶粒尺寸先缓慢变化,随后快速长大,固溶的碳化物质量分数增多,回火后锯片硬度增强,而回火温度由450提高到550℃时,马氏体板条界片层状渗碳体逐步球化,强度明显下降,塑性小幅提高;设定合适的卷取温度控制热轧态中第二相碳化物的尺寸,并在850～900℃淬火、约450℃回火是生产高硬度、高韧性51CrV4金刚石焊接锯片的关键工艺.
关键词:
金刚石焊接锯片
,
51CrV4
,
第二相析出物
,
热处理
J. Gö
,
ken
金属学报(英文版)
The simultaneous influence of thermal and mechanical treatment was applied to produce a geometrically complex shaft from 51CrV4 steel leading to the formation of microstructures which were significantly different from each other. These microstructural differences were accompanied by a local change of mechanical properties in terms of hardness, electrical resistivity and especially internal friction. The Snoek-K鰏ter peak was recognised and analysed in the structure of this steel.
关键词:
51CrV4 steel
,
steel
,
Functionally
,
Graded
,
Materia
