硼对含锡20CrMnTi钢连续冷却转变及淬透性的影响  

Effects of boron on continuous cooling transformation and hardenability of 20CrMnTi steel containing tin

作　　者：彭红兵[1] 陈伟庆[1] 陈列[2] 郭栋[2] 王海龙[2] 

机构地区：[1]北京科技大学钢铁冶金新技术国家重点实验室,北京100083 [2]西宁特殊钢股份有限公司,青海西宁810005

出　　处：《金属热处理》2015年第9期98-101,共4页Heat Treatment of Metals

摘　　要：采用Gleeble-1500热模拟试验机研究了硼对含锡20CrMnTi钢连续冷却转变的影响,同时研究了不同硼含量时该钢的淬透性。结果表明,硼含量为0.0092%时,该钢Ac3为844℃,冷速控制在0.2-1℃/s可获得均匀的铁素体＋珠光体组织,冷速大于10℃/s时,钢中全为马氏体组织。硼能提高含锡20CrMnTi钢的淬透性,B由0.0015%增加到0.0090%时,淬透性虽略有变化,但总体差别不大。Effect of boron on the continuous cooling transformation of 20 CrMnTi steel containing tin was investigated by means of Gleeble-1500 thermal simulation machine. The hardenability of the tested steels with different boron contents was also measured. The results show that the Ac3 of 20CrMnTi steel containing tin is 844 ℃ when containing 0. 0092% boron. Uniform ferrite and pearlite microstructure can be obtained when the cooling rate is in the range of 0. 2-1 ℃ / s,when the cooling rate is more than 10 ℃ / s,the microstructure is only the martensite. Boron can increase the hardenability of 20 CrMnTi steel containing tin and the hardenability changes a little when the boron content is increased from 0. 0015% to 0. 0090%.

关 键 词：硼 含锡20CrMnTi钢 连续冷却转变 淬透性 

分 类 号：TG142.13[一般工业技术—材料科学与工程]