Low Temperature Impact Toughness of Self-shielded Flux Cored Wire for Pipeline Steel
Journal Title: 河南科技大学学报（自然科学版） - Year 2017, Vol 38, Issue 2
Abstract
Taking BaF_2-Fe_2O_3-Al-Mg slag system self-shielded flux cored wire as research object,the effects of residual Al,N and O mass fraction on low temperature impact toughness of the deposited metal in welding wire was analyzed by low temperature impact toughness test. The microscopic structure of deposited metal and slag inclusion was observed via metallurgical microscopy and scanning electron microscope. The results show that the low temperature impact toughness of deposited metal in welding wire is decreased with the increase residual Al mass fraction. When residual Al mass fraction is low,the deposited metal slag inclusion is mainly circular Al_2O_3,and the weld center is fine granular bainite microstructure with higher low temperature impact toughness. When residual Al mass fraction is high,the irregular shape deposited metal slag inclusion is mainly aluminum nitride,and the weld center is granular bainite microstructure and small ferrite with lower low temperature impact toughness. The reasonably control of trace element mass fraction in welding wire is good for higher low temperature impact toughness.
Authors and Affiliations
Zhenbiao ZHU, Rungang YAO, Chun GUO
Keywords
Related Articles
- EP ID EP477984
- DOI -
- Views 78
- Downloads 0
Effect of Microwave Irradiation on Rock Impact Resistance
Based on drop impact test of granite and yellow sandstone,the decline law of rock impact resistance after microwave irradiation was studied. The relations between tha rock impact resistance and microwave power level unde...
Stress Relaxation Behavior of Al_2O_3/ Cu Dispersion Strengthened Copper Alloy
The stress relaxation behavior of Al_2O_3/Cu dispersion strengthened copper alloy at different temperature( room temperature,100 ℃,200 ℃ and 300 ℃) was studied by the stress relaxation experiment.The test data were fitte...
Influence of Diesel Engin Valve Train on Gear Cover Noise
The noise from the front gear cover of a four-cylinder agricultural diesel engine was studied by near field sound method.The valve train noise of front gear cover was separated from the whole noise of the engine by the e...
Application of Adaptive Wavelet Threshold Algorithm to Balise Signal De-noising
In order to improve the de-noising effect of balise signal,through the multi-resolution analysis characteristics of wave let transform,an improved adaptive threshold quantization method was proposed based on the analysis...
Stability of Epidemic Model with Media Coverage
An epidemic model with media coverage and latent period was investigated,and the basic reproduction number was obtained. By the linearization method and Liapunov function,the global stability of disease-free equilibrium...