新型高强韧性弹簧钢40T和44T脱碳倾向的研究  

A Study on Decarburization Trend of New High Strength and Toughness Spring Steels 40T and 44T

作　　者：尹钟大[1] 徐德祥[1] 刘德富[1] 

机构地区：[1]哈尔滨工业大学,哈尔滨150001

出　　处：《特殊钢》2005年第3期39-40,共2页Special Steel

摘　　要：新型高强韧性弹簧钢40T( % :0.41C-2.12Si-1. 03Cr-1.98Ni-0.31 Mo-0.25V) ,44T( %:0.44C-2.28Si-1.42Cr-0.25V)和弹簧钢60Si2CrVA(%:0.59C-1.65Si-1.11 Cr-0.18V)的Φ1 8mm和Φ2 6mm试验钢材由北满特钢2 0t电弧炉冶炼,经轧制、冷拔而成。各钢材经860～1 0 0 0℃加热脱碳试验的结果表明,40T钢碳含量较低,并有～2 %Ni,其脱碳倾向明显低于44T钢和60Si2CrVA钢;880℃加热1h时,40T钢没有脱碳,44T钢脱碳层深0 . 0 5mm ,60Si2CrVA钢脱碳层深0.1 5mm ;1 0 0 0℃加热2 0min ,40T钢脱碳层深0 .1mm ,44T钢0 . 2mm ,60Si2CrVA钢0 . 4mm。40T钢脱碳倾向小,有利于提高弹簧的疲劳寿命。The Φ 18mm and Φ 26mm test steel products of new high strength and toughness spring steel 40T : 0.41C-2.12 Si-1.03Cr-1.98Ni-0.31Mo-0.25V, steel 44T: 0.44C-2.28Si-1.42Cr-0.25V and spring steel 60Si2CrVA: 0.59C-1.65Si-1.11Cr-0.18V were produced by 20 t arc furnace melting, rolling and cold drawing. The results of each steel product by heating decarburizing test showed that due to lower carbon content and contained ～2%Ni in steel 40T, the decarburization trend of steel 40T obviously lower that of steel 44T and steel 60Si2CrVA: heating at 880 ℃ for 1h, there was no- decarburization in steel 40T, depth of decarburization layer was 0.05mm in steel 44T and 0.15 mm in steel 60Si2CrVA; and heating at 1 000 ℃ for 20 min, the depth of decarburization layer was 0.1mm in steel 40T, 0.2 mm in steel 44T and 0.4 mm in 60Si2CrVA. The smaller decarburization trend of steel 40T is favourable to increase the fatigue life of spring.

关 键 词：高强韧性 弹簧钢 60SI2CRVA 电弧炉冶炼 脱碳层 北满特钢 疲劳寿命 加热 碳含量 钢材 试验 轧制 冷拔 

分 类 号：TF761[冶金工程—钢铁冶金]