Q235钢表面煤矸石渗剂渗硅层的耐腐蚀性能  

Research on Corrosion Resistance of Gangue Infiltration Agent Siliconizing Layer on Q235 Steel

作　　者：周宇明[1,2] 安婷婷[2] 时海芳[2] 李庆林[2] 李琳[2] 

机构地区：[1]辽宁机电职业技术学院材料工程系,辽宁丹东118002 [2]辽宁工程技术大学材料科学与工程学院,辽宁阜新123000

出　　处：《材料保护》2015年第11期63-66,43,共4页Materials Protection

基　　金：2014年研究生科研立项资助项目(5B2014018-01)

摘　　要：为提高Q235钢的耐蚀性和资源化利用煤矸石,采用粉末包埋法,以煤矸石为主渗剂,铝粉和镁粉为还原剂,在Q235钢表面制备出厚度达100μm的渗硅层。采用金相显微镜、显微硬度计、X射线衍射仪分析了渗硅层的组织结构及硬度;通过浸泡腐蚀试验测试了渗硅层耐酸、盐、海水、煤水腐蚀性能,并与发蓝试样进行比较。结果表明:煤矸石渗硅层中含有Fe_3Si,Al_2Si Fe等新相生成,并且主要由含Si的α相固溶体组成,渗硅层的硬度最高达348.7 HV_(1 N),为基体的2.6倍;渗硅层耐酸、盐、海水、煤水腐蚀性较基体分别提高了1.32,1.42,1.47,0.54倍,较发蓝试样分别提高了1.18,1.37,1.10,0.43倍。In order to improve the corrosion resistance,Q235 steel was siliconized by using the method of power embedding with gangue as the main agent,and pure Al and Mg power as the reducing agents.The thickness of the siliconizing layer was about100 μm,Metallographic microscope,microhardness and X-ray diffractometer were used to analyze the layer' s structure and hardness.Moreover,the corrosion resistance of the siliconizing layer was measured in acid,salt,sea water and coal water solutions,and compared with that of the bluing samples.Results showed that the layer was made of α- phase solid solution containing Si,and Fe_3 Si,Al_2 SiFe and other new phases as well.The maximum micro- hardness of the layer was 348.7 HV_(1N),and 2.6times that of the base(134.5 HV_(1N)).The corrosion resistance of the layers in acid,salt,seawater and coal water solutions was increased by 1.32 times,1.42 times,1.47 times and 0.54 times than that of the base,and by 1.18 times,1.37 times,1.10 times and 0.43 times than that of the bluing samples,respectively.

关 键 词：Q235钢 粉末包埋法 煤矸石 渗硅 耐蚀性 

分 类 号：TG174.445[金属学及工艺—金属表面处理]