鋼材摩擦圧接の圧接面における焼付現象の実験的検討 -摩擦圧接の接合メカニズムに関する研究（第5報）-
鋼材摩擦圧接の圧接面における焼付現象の実験的検討 -摩擦圧接の接合メカニズムに関する研究（第5報）-
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钢摩擦焊焊接表面咬合现象的实验研究-摩擦焊连接机理研究（第五次报告）-
DOI：
10.2207/qjjws.23.460
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发表时间：
2005
期刊：
影响因子：
--
通讯作者：
冨士 明良
中科院分区：
文献类型：
--
作者：
木村 真晃;安 圭栢;日下 正広;瀬尾 健二;冨士 明良
本文描述了钢管摩擦焊过程中焊接界面处的咬合现象。阐明了摩擦速度与初始扭矩之间的关系，并根据实验结果估算了相对速度与焊接界面咬合温度之间的关系。通过恒温摩擦试验澄清了母材的咬合现象，其中摩擦表面在电炉中在不同温度和负载压力下相互摩擦。然后，通过恒温摩擦试验获得摩擦表面的咬合温度。实验得出以下总结结果：（1）低摩擦速度焊接管道时，摩擦扭矩曲线具有磨损和咬合阶段，直到初始扭矩。磨损阶段时间随着摩擦速度的增加而减少。在相同摩擦压力下焊接时，初始扭矩随着摩擦速度的增加而减小，随着摩擦压力的增加而增加。(2)利用母材在咬合温度下的扭剪强度与实测初始扭矩之间的关系，计算焊接界面的咬合温度。焊接界面低相对速度时的咬合温度低于高相对速度时的咬合温度。(3)通过恒温摩擦试验，在相同加载压力下，最大摩擦扭矩随着摩擦温度的升高而增大，在相同摩擦表面温度下，最大摩擦扭矩随着加载压力的增加而增大。(4)当加载压力在423K时达到或超过30MPa，摩擦表面温度在323K时达到或超过90MPa时，母材摩擦表面开始咬合。
The present paper describes the seizure phenomena at welded interface during steel pipe friction welding. The relationship between friction speed and initial torque was clarified, and the relationship between relative speed and seizure temperature at the welded interface was estimated from the experimental results. The seizure phenomenon of the base metal was clarified by a constant temperature friction test in which the friction surfaces were rubbed together at various temperatures and loaded pressures in an electric furnace. Then, the seizure temperature at the friction surface was obtained by constant temperature friction tests.The experiments produced the following summarized results.(1) The friction torque curve had wear and seizure stages until the initial torque when pipes were welded at low friction speed. The wear stage time decreased with increasing friction speed. The initial torque decreased with increasing friction speed when pipes were welded at the same friction pressure, and increased with increasing friction pressure.(2) The seizure temperature at the welded interface was calculated by using the relationship between the torsional shear strength of the base metal at its seizure temperature and the measured initial torque. The seizure temperature for a low relative speed at the welded interface was lower than that for a high relative speed.(3) The maximum friction torque increased with increasing friction temperature at the same loaded pressure, and they increased with increasing loaded pressure at the same friction surface temperature by constant temperature friction tests.(4) The friction surface of the base metal began to seize when loaded pressure and friction surface temperature reached or exceeded 30MPa at 423K, and 90MPa at 323K, respectively.