退火工艺对<strong>304</strong>奥氏体不锈钢的组织演变及氢脆行为的影响

退火工艺对304奥氏体不锈钢的组织演变及氢脆行为的影响

张慧云, 郑留伟, 梁伟

Effect of Annealing Process on Microstructure Evolution and Hydrogen Embrittlement Behavior of 304 Austenitic Stainless Steel

ZHANG Huiyun, ZHENG Liuwei, LIANG Wei

表1 假设所有氢都位于晶界, 计算得到的晶粒尺寸(d)、单位体积晶界面积(S_v)、扩散氢含量(X_H)和单位晶界面积氢含量(X

_{H}^{G B}

)汇总

Table 1 Summary of the grain size (d), grain boundary area per unit volume (S_v), content of diffusible hydrogen (X_H), and hydrogen content per unit grain boundary area (X

_{H}^{G B}

) obtained by calculation under an assumption that all hydrogen atoms locate at grain boundaries

Sample	d / μm	S_v / m²·m^-3	X_H / mg·kg^-1	X $_{H}^{G B}$ / g·m^-2
900 ^oC-30 min	20.01	1.0 × 10⁵	5.48	4.3 × 10^-4
1000 ^oC-60 min	30.35	6.59 × 10⁴	3.91	4.7 × 10^-4