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摘要搪瓷钢板在国民经济中发挥着十分重要的作用，在日常生活中与人们的关系十分密切，广泛地应用于轻工、家电、冶金、化工、建筑等行业。长期来我国用于搪瓷制品的钢板主要靠进口，近几年搪瓷工业对冷轧薄钢板的需求量约15万吨／年左右，其中约80%靠进口，所以研制国产搪瓷用钢板已迫在眉睫。搪瓷钢板常常会出现“鱼鳞爆”问题，产生这一问题最主要的原因就是氢在钢板中的扩散。搪瓷钢板氢扩散能力标志了其储氢能力的高低。本课题通过研究分析不同进口钢板的合金析出相的种类、大小以及分布情况，同时借助电化学方法测试材料的氢穿透时间、陷阱参数、氢扩散激活能，从而研究不同合金析出相对氢扩散的影响。结果显示，在钢板中添加Ti、Mn、Cr等微合金元素形成的碳氮化物、硫化物、氧化物等析出相均能增加钢板中的不可逆陷阱数量，不可逆陷阱数目越多，种类越多，其氢扩散系数越小，氢在越难钢中扩散，钢板的抗鳞爆性能越好。6071
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关键词： 搪瓷钢；鳞爆；氢渗透；氢扩散系数；陷阱数；不可逆陷阱
Abstract
Enamel steel plate in the national economy plays a very important role in daily life is in close relation with people's widely used in light industry, household appliances, metallurgy, chemical industry, building, etc. The steel plate for enamel products mainly rely on import for a long time. In recent years, the demand for cold rolled steel sheet for about 150000 tons/year, of which about 80% of imports, so develop the enamel use steel plate is imminen. Fishscal problems often appears in the Enamel steel plate, which is because of the hydrogen Diffusion. Enamel steel hydrogen diffusion capacity marks the level of the ability of hydrogen storage. We utilize the measure of adding trace alloys which affect the type, size and distribution of the irreversible traps (alloys) in low carbon steel such as vanadium, titanium and so on. While the electrochemical method is used to test the hydrogen penetrate time, the trap parameters, hydrogen diffusion activation energy, irreversible traps. The results show that Ti, Mn, Cr, etc is added in the steel micro alloy elements in the formation of the carbon nitride, sulfide and oxide precipitate phase can increase the number of irreversible traps in steel plate. the more irreversible traps with more types of them, the smaller the diffusion coefficient of hydrogen, so that hydrogen diffusion is harder. The scaling resistance is better.
Keywords: Enamel Steel; scale;Hydrogen Permeation; Hydrogen Diffusion Coefficient; The Number Of Traps; Irreversible Trapping
目录
1. 概述 1
1.1 搪瓷钢定义及存在问题 1
1.1.1 搪瓷钢定义 1
1.1.2 搪瓷钢主要问题 2
1.2 氢扩散以及氢陷阱理论 3
1.2.1 氢扩散定义 3
1.2.2 氢扩散对金属的影响 3
1.3 氢陷阱理论 4
1.3.1 氢陷阱定义及种类 4
1.3.2 氢陷阱对氢扩散的影响 5
1.3.3 影响不可逆陷阱的因素 7
1.4 搪瓷钢抗鳞爆性的评价方法 8
1.4.1常见评价方法 8
1.5 研究目的与意义 9
2. 实验材料及方法 10
2.1 实验材料 10
2.2 实验方案 10
2.2.1材料组织与性能分析 10
2.2.2 氢渗透实验 11
2.3 实验设备 14
3. 实验结果及分析 14
3.1 微观组织 14
3.2 析出相分析 15
3.3 氢渗透测试结果 19