【摘要】 用预处理熔铸工艺制备的ＴｉＣ颗粒增强钛基复合材料的室温和３００℃～７００℃拉伸性能测量表明：复合材料相应于未复合基体合金的强度增量在室温达到２４％，而到６５０℃降为４％，表明复合材料的显微组织有利于室温和低于 ６５０℃的中等温度强化； ４００℃～５００ ℃时出现动态应变时效，但延性并未明显下降，意味着 ＰＴＭＰ工艺制成的 ＴｉＣ／Ｔｉ复合材料间隙元素含量低； ３００ ℃～５００ ℃下加工硬化明显增加，可能与复合体中位错密度增加有关。更多还原

【Abstract】 The tensile properties of TiC-particulate-reinforced Ti metal matrix composite(MMC) produced by pre-treatment melting process (PTMP) have been determined at room temperature and 300℃ 650℃. It was found that relative strength increment of the Ti matrix composite is the greatest at room temperature (up to 24% ) and decreases with increasing temperature (just 4% at 650℃), which means that the microstructure of this composite is favorable for strengthening at lower than 650℃. Dynamic strain aging occurred at 400℃ 500℃, but elongation did not decrease so much, which means that the contents of interstitial impurities are low for the composite produced by PTMP. The increase in work hardening at 300℃ ～500℃ may be relate to high dislocation density in composite.更多还原