Abstract��In order to obtain the comprehensive thermal physical properties and mechanical properties of domestic large size forgings GH690 alloy�� different thermal physical performance test and analysis methods and tensile tests were carried out to test and analyze the thermal expansion�� thermal diffusivity�� thermal conductivity�� specific heat�� elastic properties�� density�� melting point and tensile properties of GH690 alloy within 1 100 ��. Results showed that within the 1 100 �棬 the thermal expansion coefficient�� thermal diffusivity and thermal conductivity of GH690 alloy increased with temperature rise�� but its elastic modulus and shear modulus decreased with temperature rise. Least square method was used to establish the function relation among linear thermal expansion�� average linear expansion coefficient�� thermal diffusivity�� thermal conductivity�� elastic modulus�� shear modulus and temperature. Alloy tensile strength and yield strength decreased with temperature rise while elongation and reduction of area increased first and then decreased with temperature rise�� reduced to a minimum at 700 ��.
ʯ���ģ� �����壬 �δ����� �������� �� ϼ. ��ߴ�ͼ�GH690�Ͻ�����������ܺ���������[J]. �й������ڿ���, 2015, 33(6): 6-10.
SHI Zhao-xia�� YAN Xiao-feng�� DUAN Chun-hua�� ZHAO Ming-han�� CHEN Xia. Thermal physical properties and tensile properties of large size forgings GH690 alloy. Chinese Journal of Iron and Steel, 2015, 33(6): 6-10.
2015, Vol. 33 
