The result shows that the argon gas can effectively decrease the hardness gradient and improve the thermal fatigue behavior of ion nitriding steel H13.
结果表明：氩气能有效降低渗层的硬度梯度，提高离子渗氮h 13钢的热疲劳性能。
2
This behavior will be helpful to decrease temperature gradient and to lessen surface thermal stress of concrete structure so as to prevent cracking of a structure.
上述特性将有助于减小混凝土内部温度梯度，对于防止水工混凝土结构表面裂缝起到良好的作用。
3
Residue and behavior of qingkuling in rice was studied by washing-gradient of liquid chromatography.