摘要
采用不同热处理温度和时间对6年生毛竹进行改性处理,并分析其蠕变特性的变化规律。结果表明:当热处理温度为140℃时,蠕变柔量随热处理时间的增加而减少;热处理温度为220℃时,蠕变柔量随热处理时间的增加而增加;热处理温度180℃的竹材恒定蠕变阶段的蠕变速率大于140℃时的蠕变速率,蠕变柔量由低温时随热处理时间增加而降低,向高温时随热处理时间增加而增加转变过渡。热处理时间为2和4 h时,其蠕变柔量随热处理温度升高而降低,减速蠕变阶段变化较为接近;而热处理时间为6 h时,其塑性随热处理温度的升高而增大,蠕变柔量也随之增大。
Samples of 6-year-old Moso bamboo were treated at different temperature and time to investigate their creep behavior.According to the experimental results,the creep compliance decreased with prolonged heating time when the treatment was performed at 140 ℃.When the treatment temperature rose to 220 ℃,the creep compliance increased with prolonged heating time.When the heating time were 2 and 4 h,the creep compliance decreased with rising treatment temperature.When the time was prolonged to 6 h,the plasticity and creep compliance of the samples increased with rising treatment temperature.When the heat treatment time was 6 h,the plasticity properties and creep compliance were all increased with temperature rising.
出处
《林业科技开发》
北大核心
2015年第1期72-75,共4页
China Forestry Science and Technology
基金
浙江省科技计划项目(2012C37067)
浙江省科技厅项目(2012R10023)
关键词
热处理温度
热处理时间
蠕变柔量
竹材
heat treatment temperature
heat treatment time
creep compliance
bamboo
