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抗氢钢中形成稳定的合金碳化物以固定碳,避免在高温、高压下与氢作用形成甲烷造成氢损伤,这不仅与钢材成分的合理设计有关,而且与合理选择热处理制度密切有关。本文采用综合相分析方法对12SiMoVNb合金碳化物析出及其与氢相互作用行为进行探讨,指出采用～1000℃正火及720℃～740℃高温回火,以获得在铁素体基体上分布着以V_4C_3为主的弥散碳化物,以及Mo、V、Nb元素固溶强化是该合金获得综合力学性能,特别是高温(400℃P_(H2)=200kg/cm~2)抗氢腐蚀性能的关健。
Hydrogen-resistant steel to form a stable alloy carbide to fix the carbon, to avoid the role of hydrogen in the formation of methane under high temperature and pressure to cause hydrogen damage, which not only with the rational design of the steel composition, but also with a reasonable choice of heat treatment system is closely related. In this paper, the comprehensive phase analysis of 12SiMoVNb alloy carbide precipitation and hydrogen interaction behavior were discussed, and pointed out that the use of ~ 1000 ℃ normalizing and tempering at a high temperature of 720 ℃ ~ 740 ℃, in order to obtain the ferrite matrix distribution V_4C_3-based dispersion carbide, and Mo, V, Nb solid solution strengthening of the alloy to obtain comprehensive mechanical properties, especially the high temperature (400 ℃ P_ (H2) = 200kg / cm2) .