摘要
采用自约束热疲劳试验法研究了钢结硬质合金表面化学镀钴-磷层的热疲劳特性。研究了热疲劳后镀层的损伤及热裂纹的萌生与扩展特征。探讨了热疲劳寿命与镀层厚度和热循环次数的关系。结果表明,在热循环初期镀层表面所形成的氧化膜与镀层结合良好,阻止了镀层的进一步氧化腐蚀,提高了镀层的热疲劳性能。
The thermal fatigue behavior of chemically plated Co-P coating on steel bonded carbide was investigated by a self-restrietable testing method. The thermal fatigue damage of coating, the initiation and propagation of thermal fatigue cracks were also observed. The effect of coating thickness and number of thermal cycles on the thermal fatigue life was studied as well. The results indicate that the oxide film formed on coating surface at the initial stage of thermal cycle will well combine with the coating and can prevent the coating from being further oxidized and corroded, thus improving on its thermal fatigue behavior.
出处
《热处理》
CAS
2010年第1期53-57,共5页
Heat Treatment
关键词
钢结硬质合金
化学镀
热疲劳
氧化腐蚀
steel bonded carbide
chemical plating
thermal fatigue
oxidation corrosion
作者简介
杨庆海（1983-），男，山东秦安人，合肥工大材料学院2007级硕士研究生，主要从事WC／钢复合材料研究。联系电话：13645601456，E-mail：qhyang727@163．com
