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选用含有多种碳化物形成元素的抗氢钢10MoWVNb,应用金相、高分辨率透射电镜、x 射线衍射分析、扫描电镜等手段,探讨在高温高压氢介质中,在温度、压力固定的情况下,钢中碳化物的稳定性、数量、分布对氢腐蚀的影响。首先,直观地引证了微碳纯铁在甲烷反应时渗碳体的氢腐蚀现象。试验结果表明,10MoWVNb 钢随不同的热处理工艺,钢中的碳化物类型、数量、分布不同,其抗氢腐蚀的程度差异很大。为此,必须通过合适的热处理工艺以获得在细晶粒铁素体基体上弥散分布着细小合金碳化物的组织。这是抗氢钢欲得良好抗氢腐蚀性能和综合机械性能的关键。
Hydrogen-resistant steel 10MoWVNb containing a variety of carbide-forming elements was selected. Metallography, high-resolution transmission electron microscopy, X-ray diffraction analysis and scanning electron microscopy were used to investigate the effect of temperature and pressure on the , The stability of carbides in steel, the quantity and distribution of hydrogen corrosion. First of all, the hydrogen corrosion phenomenon of cementite in the reaction of methane with micro-carbon pure iron is intuitively quoted. The results show that 10MoWVNb steel with different heat treatment process, the type of steel in the carbide, the number and distribution of different degrees of resistance to hydrogen corrosion vary widely. To this end, we must go through a suitable heat treatment process to obtain the fine grain ferrite matrix dispersedly distributed fine carbide alloy organization. This is the key to good hydrogen corrosion resistance and mechanical properties of hydrogen resistant steels.