低碳贝氏体钢在青岛曝晒一年的锈层力学性能和抗热震性能研究

• 作 者: 王树涛 高克玮 杨善武 贺信莱
• 机 构: 北京科技大学材料物理与化学系,
• 出 处: 腐蚀科学与防护技术
• 发表日期: 2010年01期
• 关键词: 锈层 低碳贝氏体钢 结合强度 热震 钢基体 抗热震性能 基体界面 力学性能 耐候钢 非晶相

研究了低碳贝氏体钢在青岛曝晒一年后表面锈层的相组成、形貌、力学性能以及抗热震性能.结果表明:锈层由α-FeOOH、β-FeOOH、γ-FeOOH、Fe3O4以及非晶相组成;锈层的表面和截面形貌显示锈层较为致密,合金元素Cr和Cu在锈层中接近钢基体处有明显的富集现象;锈层的弹性模量和硬度随距锈层/钢基体界面的距离增大而降低;锈层/钢基体的结合强度和抗热震能力均高于锈层本身.

The phase composition, morphology, mechanical properties and thermal shock resistance of low carbon bainitic steel after exposure for one year in Qingdao were studied.The results show that the rust layer consists of α-FeOOH, β-FeOOH, γ-FeOOH, Fe3O4 and amorphous phase. The surface and cross-sectional morphology of the rust layer showed that the rust layer was more dense, and the alloying elements Cr and Cu were obviously enriched in the rust layer close to the steel substrate. The elastic modulus and hardness of the rust layer The distance from the rust layer / steel substrate interface increases and decreases; the bonding strength and thermal shock resistance of the rust layer / steel substrate are higher than the rust layer itself.