摘要
采用热重分析仪和Gleeble-3500热模拟试验机研究了Si、Cr、Ni和Cu微合金元素对超低碳钢氧化行为和氧化层的影响。结果表明,在氧化过程中合金元素在氧化层与基体的界面处发生富集,其中Si和Cr形成了一层连续的富集层,Cu和Ni以粒子形式在界面处析出。微合金元素的富集一方面抑制了铁原子由基体向外扩散,从而显著提高钢的抗氧化性,其中Si和Ni的效果最好,Cr次之,Cu的效果最差;另一方面提高了氧化层与基体的结合力,抑制了氧化层的鼓泡现象,Si的抑制效果最好,Cu次之,Cr和Ni的抑制效果最差。
The influence of microalloying elements Si,Cr,Ni and Cu on oxidation behavior and oxide scale of steel was investigated by thermo-gravimetric analyzer and Gleeble-3500 thermo-mechanical simulator. The results show that microalloying elements accumulate at scale / substrate interface,for example Si and Cr form a continuous layer at the interface,and Cu and Ni form precipitates at the interface.The microalloying elements function in two ways： the one way is restraining the outward diffusion of iron atoms from substrate to scales resulting in decrease of oxidation rate; the other way is enhancing the bonding force of scale and substrate interface and consequently suppressing the blister of scales. Si has the best suppression effect,following is Cu,and the last is Cr and Ni.
出处
《金属热处理》
CAS
CSCD
北大核心
2016年第4期105-109,共5页
Heat Treatment of Metals
关键词
微合金元素
高温氧化
氧化层
组织结构
microalloying elements
high temperature oxidation resistance
oxide scale
microstructure
