NM450D耐磨钢-Q235B碳钢复合板的轧制和热处理工艺对组织、性能的影响  

Effect of Rolling and Heat-Treatment on Structure and Properties of Wear-Resistant Steel NM450D-Carbon Steel Q235B Clad Plate

作　　者：邱俊[1] 程晓茹[1] 兰昆[1] 雷冬[1] 王煜[1] 黄大军[2] 

机构地区：[1]武汉科技大学钢铁冶金及资源利用省部共建教育部重点实验室,武汉430081 [2]武汉钢铁股份有限公司,武汉430083

出　　处：《特殊钢》2017年第2期56-59,共4页Special Steel

摘　　要：10 mm NM450D低合金耐磨钢板(/%:0.22C,0.70Cr,1.50Mn,0.30Si,0.012Ti,0.030Nb)和10 mm Q235B碳钢板(/%:0.19C,0.25Mn,0.04Si)经表面处理和四角焊接成20 mm复合板,在180 mm二辊实验轧机上经1 150℃,60%压下率和930℃,30%压下率两次轧制成5.6 mm复合板,再经800~1 000℃淬火,250℃回火处理。结果表明,经900℃淬火+250℃回火的低合金耐磨钢-碳钢复合板的5.6 mm复合界面接触良好,Q235B钢组织为板条马氏体+铁素体和少部贝氏体和珠光体,NM450D钢组织为回火马氏体,其HV值为500,复合钢板抗剪强度为367 MPa,均达到标准要求。The 20 mm clad plate of surface-treated 10 mm plate of low alloy wear-resistant NM450D steel （/% ： 0. 22C, 0. 70Cr, 1.50Mn, 0. 30Si, 0. 012Ti, 0. 030Nb） and l0 mm plate of carbon steel Q235B （/% ： 0. 19C, 0. 25Mn, 0. 04Si） is welded at four-corner of plate and double-rolled by a lab 180 mm two-high mill with reduction 60% at 1 150 ℃ and with reduction 30% at 930 ℃ to 5.6 mm clad plate, then quenched at 800 - 1 000 ℃ and tempered at 250 ℃. Re- sults show that the clad interface of 5.6 mm clad plate of low alloy wear-resistant steel-carbon steel quenched at 900 ℃ ＋ tempered at 250 ℃ has nice contact, the structure of steel Q235 is lath martensite ＋ ferrite and minor bainite and pearlite, the structure of steel NM450D is tempered martensite with HV hardness value 500, the shearing-strength of clad plate is 367 MPa, all meet the requirement of standard.

关 键 词：NM450D耐磨钢-Q235B碳钢复合板 复合界面 控制轧制 热处理 组织 剪切强度 

分 类 号：TG335.5[金属学及工艺—金属压力加工] TG162.83