Determination of Viscosity Coefficient of 0.45C Steel by Infrared#br# Thermographic Sensor at Ambient Temperature#br#
特殊钢2008年29卷第2期 页码:34-36
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网络首发:2023-01-19,
纸质出版:2008-01-19
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红外热像仪测定45钢常温黏性系数[J]. 特殊钢, 2008,29(2):34-36.
Determination of Viscosity Coefficient of 0.45C Steel by Infrared#br# Thermographic Sensor at Ambient Temperature#br#[J]. Special Steel, 2008, 29(2): 34-36.
红外热像仪测定45钢常温黏性系数[J]. 特殊钢, 2008,29(2):34-36.DOI:
Determination of Viscosity Coefficient of 0.45C Steel by Infrared#br# Thermographic Sensor at Ambient Temperature#br#[J]. Special Steel, 2008, 29(2): 34-36.DOI:
加载频率138 Hz)试样表面温度的变化。求出不同频率疲劳过程非塑性效应下工作载荷与温升值的关系,得岀 常温下45钢黏性系数F = 1 496.1 Pa • s。
Abstract
The thermographic figure of 0. 45 C steel during fatigue testing has been measured by high frequency fatigue testing machine using infrared thennographic sensor. The change of surface temperature of test sample was recorded at three load conditions - Nol- load ratio r = - 1 ; loading frequency 137. 8Hz at 26. 2℃; No2- average tensile stress σ
m
= 224 MPa
loading frequency 141 Hz at 22. 1 ℃ ; No3- σ
m
= 187 MPa
loading frequency 138 Hz at 27 °C. The relation between temperature rise value and service load below fatigue limit with different frequency during non-plastic test was derived and it was obtained that the viscosity coefficient of 0. 45C steel F=1 496.1 Pa·s.