摘要
为提高钛合金板材的表面硬度,对其进行了火焰加热淬火表面强化处理,采用数值模拟的方法研究了火焰加热的温度场以及沿壁厚方向上的温度变化特点,分析了金相组织和硬度。试验结果表明:采用火焰加热淬火表面强化工艺可以获得晶粒细小、硬度高于基体硬度的强化层,火焰强度越高,表面硬化效果越好,表面最高硬度达456HV;在火焰线扫描速度保持一定的条件下,火焰喷射强度影响的主要是合金表面硬度值,对其淬透层厚度影响不大。
The flame heating quench strengthen technologh was carried on the surface of tianium alloy plate. In order to explore process of flame heating titaniun alloy plate temperature field were analyzed with method ofnumerical simulation. Dynamic process was researched. The microsturcture and the hardness were analyzed. The result shows that the strengthened layers with tiny crystal grain and higher degree of hardness than the substrate＇ s are obtained. The highest degree of hardness reaches 456HV at higher flame intensity. The degree of hardness is related to the scanning rate of flame but not flame intensity.
出处
《表面技术》
EI
CAS
CSCD
北大核心
2009年第2期17-18,共2页
Surface Technology
基金
国家重点基础研究发展计划(973计划)(2007CB613805)
关键词
钛合金
热处理
火焰加热
淬火
显微组织
Titanium alloy
Heat-treatment
Flame heating
Quenching
Microstructure
