合金元素及热处理工艺对高压气瓶钢性能的影响  

Effect of alloying elements and heat-treatment on properties of high-pressure gas cylinder steel

作　　者：姚赞[1] 陆明和[1] 蔡海燕[1] 蒋锡军[2] 

机构地区：[1]宝山钢铁股份有限公司研究院,上海201900 [2]宝山钢铁股份有限公司钢管条钢事业部,上海201900

出　　处：《宝钢技术》2012年第4期14-17,22,共5页Baosteel Technology

摘　　要：系统研究了V、Mo、Mn合金元素的添加及热处理工艺参数对Cr-Mo低合金气瓶钢性能的影响。研究发现,540℃回火时添加0.13%的V元素可使合金强度提高60 MPa,材料强度的提高主要来源于晶粒组织的细化。随回火温度的升高,材料强度线性降低,但添加V的合金具有更好的回火稳定性。进一步增加合金Mo元素含量,其抗拉强度在570℃回火时达到峰值1 245 MPa,600℃回火时样品强度达到1 185 MPa,-50℃低温冲击韧性为52 J/cm2,具有良好的强韧性配合。Mn元素虽然也有利于提高材料强度,但样品冲击韧性一直处于较低值。The effect of V, Mo and Mn addition and heat-treatment on properties of the Cr - Mo gas cylinder steel was investigated in this paper. It was found out that by adding 0.13% V into the steel sample and tempering it at 540℃, the tensile strength of the sample would increase by 60 MPa. The reason was that the sample＇s grains had been refined. As the tempering temperature increased, the steel sample＇ s strength would decrease linearly. However, the alloy with V addition showed better tempering stability. By adding more alloying element, Mo, into the steel sample and tempering it at 570℃ for 2 h, the sample＇s tensile strength would reach the peak value, 1 245 MPa. When the tempering temperature was 600℃, its strength was 1 185 MPa and its toughness （ -50℃ ） was 52 J/cm2. At that time, the steel had excellent combination of strength and toughness. Though the addition of Mn could improve the alloy strength, the steel sample＇ s toughness remained at a low level.

关 键 词：高压气瓶钢 高强度 冲击韧性 微合金化 调质处理 

分 类 号：TG142.4[一般工业技术—材料科学与工程] TG161[金属学及工艺—金属材料]