热处理温度与时间对马尾松木材脆性的影响  

Effect of Heat Treatment Parameters on Brittleness of Masson Pine Wood

作　　者：郭飞[1,2] 黄荣凤[1,2] 吕建雄[1,2] 高志强[1,2] 

机构地区：[1]中国林科院木材工业研究所 [2]国家林业局木材科学与技术重点实验室,北京100091

出　　处：《木材工业》2016年第3期9-12,共4页China Wood Industry

基　　金："十二五"国家科技支撑计划"家装材与室外材增值制造技术研究与示范"(2012BAD24B02)

摘　　要：为评价热处理温度和时间对木材脆性的影响,在170~230℃范围内对马尾松木材进行2~8 h的热处理,并进行静态弯曲试验。结果表明,木材脆性增加的主要原因是其塑性下降;未处理材无脆断现象,而热处理木材在230℃处理6 h及以上时,超过50%的试件发生脆断。处理温度每提高30℃及处理时间从2 h延长到4 h时,对木材脆性变化影响显著。To evaluate effect of heating temperature and duration on brittleness properties of heat treated masson pine （Pinus massoniana）, the specimens were treated at temperatures between 170 ℃ to 230 ℃ and heating duration between 2 to 8 hours, then subjected to a static bending test. Results revealed that the main reason for brittleness increase was reduced plasticity. In contrast, elasticity of heat treated samples was hardly affected. Brittleness of untreated masson pine was 22.26%, and increased to 33.64%-89.01% after heat treating. No brittle failures of the control specimens were observed, while more than half the specimens showed brittle failures when treated at 230 ℃ for 6 or more hours.

关 键 词：热处理 马尾松 脆性 静态弯曲 脆断 

分 类 号：S781.7[农业科学—木材科学与技术]