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Experimental Comparison Study on Stress Relief for Welded Low Carbon Steel (St 37) Bar by Vibration Mechanism and Heat Treatment Process

机译:振动机理和热处理工艺焊接低碳钢(ST 37)棒应力消除的实验比较研究

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In this paper An Experimental process of vibration stress relief (VSR) and post-weld heat treatment (PWHT) after welding the resonant vibration is implemented. Depending on the vibration frequency as the indications for stress relief for a Welded Low Carbon Steel (St. 37) Bar. The vibration frequency should be applied to the structure and the structure natural frequency should be close each other in vibration mode, and with small vibration amplitude which will be amplified during vibration under a 7 N force of frequency which it close to the natural frequency of the welded bar (at resonance) for 20 mints. When the amplitude of vibration in the stress relief became large, then the treatment will be more effective. The (PWHT) is employed for comparison, and indication that the stress been relief are take place by mean of metallurgical and mechanical properties development and change in the natural frequency before and after treatment lead to change the amplitude for small to larger also indicate that the stress been relived.
机译:在振动应力消除(VSR),并焊接所述共振振动后焊后热处理(PWHT)的本文的实验过程中实现。根据振动频率作为适应症为应力释放用于焊接低碳钢(圣37)栏。的振动频率应被施加到结构并且该结构固有频率应当接近彼此在振动模式,和与将振动期间下频率的7 N力被放大小的振动幅度,它接近的固有频率焊接杆(在共振)20个薄荷糖。当在应力消除振动的振幅变大,则该治疗会更有效。的(PWHT)用于比较,并且指示所述应力被浮雕是发生由平均的冶金和机械性能的发展和变化的自然频率的治疗前和治疗后导致为小幅度改变为更大的还表明压力被重温。

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