低温回火 meaning in Chinese
low temperature tempering
low tempering
low-temperature tempering
Examples
- Low high temperature tempering
回火有低温回火及高温回火 - For example , the quenching and quenching plus low tempered structure of 38crmoal are hard to be differentiated by velocity method and the principal frequency technique . it will be better if they are differentiated by the method of relative attenuation coefficient
38crmoal钢的淬火与淬火+低温回火组织，用声速法和主频率比较法都难以区分，最好的方法是比较功率谱谱峰特征(幅度、数量、分布) 。 - The variation principle of wave velocity in different microstructures of 40cr is similar with that of 38crmoal . the velocity in quenching and low temperature tempering structure of gcrlssimn is much lower than the velocity in normalizing , annealing and high temperature tempering structure
Gcr15simn钢淬火+低温回火组织的c _ 1远大于正火、退火及淬火+高温回火组织的c _ 1 ；正火、退火及淬火+高温回火组织的c _ 1比较接近。 - The difference among the elasticity modulus of various microstructures is probably the main reason , which caused the experiment results above . under the same experiment conditions , such as sample shape , size , surface roughness , establishment of testing system , pressure on the probe , and thickness of coupling medium , the variety of relative attenuation coefficient ( or ) in different heat treatment samples is measured and compared by measuring the attenuation obtained from the cylindrical surface of column . the result is as following : for 40cr and 38crmoal , a mt < az mq < a s < a p + f ; for gcrlssimn , a mt < a annea < s < a p + f ; and a increased with the increasing of frequency
在保证试样形状、尺寸、表面光洁度、系统参数设置、施加在探头上的压力以及耦合层厚度等测试条件一致的情况下，利用棒材圆柱面测衰减系数法，分别测定并比较上述不同热处理试样相对衰减系数的变化情况，得到的实验结果是：对于40cr及38crmoal钢， _ (低温回火) (淬火) _ (高温回火) _ (正火) ；对于gcr15simn钢， _ (低温回火) _ (退火) _ (高温回火) _ (正火) ；且随着频率的提高，衰减系数均呈现增加的趋势。 - Annealing could reduce hardness and raise toughness , which could be prone to mechanical machining . quenching and low temperature tempering could raise intensity and hardness of materials , not reduce toughness obviously . quenching on same temperature caused ticp / fe in situ composites having the best integral machine properties
退火处理使材料的硬度降低，韧性提高，便于机械加工；淬火+低温回火处理使材料的强度和硬度提高，而韧性无明显的降低；采用等温淬火工艺，可使tic _ p fe复合材料具有最好的综合机械性能。