【摘要】 采用电化学渗透方法,测定了氢在（α+γ）双相不锈钢中的扩散渗透曲线。氢的表观扩散系数与奥氏体含量（f_γ）的关系为:D=0.27+0.9/f_γ²(10^-10cm²/s),初步证明氢在（α+γ）双相不锈钢中主要是通过α相和γ相“串联”扩散,扩散系数D≈D_αD_γ/（f_γ²D_α+f_α²D_γ）,其中D_α,D_γ分别为氢在α相和γ相中的扩散系数,f_α,f_γ分别为α和γ相的体积分数。更多还原

【Abstract】 The permeation curves of hydrogen in （α+γ） duplex stainless steelhave been electrochemically determined. The apparent diffusivity of hydrogen de-pends on the austenite content （fγ） at room temperature, D=（0.27+0.9/f_γ²） (10^-10cm²/s). It is simply verified that hydrogen in （α+γ） duplex stainless steel diffusesin "series-connection" form through both ferrite and austenite, the apparent diffu-sivity is D≈D_αD_γ/（f_α²D_γ+f_γ²D_α）, where D_αD_γare respectively diffusivity of hydrogenin ferrite and austenite, f_α,f_γare volume fraction, in turn, of ferrite and aus-tenite.更多还原