周 凡,付宗营,高 鑫,周永东.热处理对桃花心木材尺寸稳定性和力学性能的影响[J].木材工业,2019,33(5):49-52
热处理对桃花心木材尺寸稳定性和力学性能的影响
Dimensional Stability and Mechanical Properties of Heat-treated Mahogany Wood
  
DOI:
中文关键词:  桃花心木;热处理;平衡含水率;尺寸稳定性;力学性质
英文关键词:Mahogany wood;heat treatment;equilibrium moisture content (EMC);dimensional stability;mechanical properties
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作者单位
周 凡,付宗营,高 鑫,周永东 中国林科院木材工业研究所,北京 100091 
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中文摘要:
      以温度150~210 ℃保温4 h、180 ℃保温2~6 h 为条件,探究桃花心木材适用的热处理工艺。随着热处理温度 升高和保温时间延长,试材平衡含水率和湿胀率逐渐降低,阻湿率和抗胀率增大;抗弯弹性模量在180 ℃以上时明 显降低,抗弯强度随温度升高一直下降;随180 ℃保温时间的延长,抗弯弹性模量和抗弯强度先下降后趋于稳定。
英文摘要:
      Mahogany wood samples were heat-treated at five temperatures ranged from 150 and 210 ℃ for 4 hours, respectively. Another two groups of Mahogany wood samples were treated at 180 ℃ for 2 and 6 hours, separately. The dimensional stability and mechanical properties of the samples were tested. The results showed that the equilibrium moisture content (EMC) and swelling values of the samples decreased while increasing treating temperatures and times. This trend led to the increase of the moisture excluding efficiency and anti-swelling efficiency of the wood. The modulus of elasticity (MOE) of the samples decreased significantly when the heating temperature was above 180 ℃. The modulus of rupture (MOR) of the samples decreased gradually with the increment of heating temperatures. The MOE and MOR of the samples treated at 180 ℃ decreased gradually until reaching stable values when the treating time maintained from 2 hours to 6 hours.
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