The coating of low carbon steel surface with the electrodes containg boron and investigation of abrasive wear behaviour

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In the present study, the shielded metal arc welding electrodes containg boron were produced and low carbon steel plates were surfaced with single pass bead on plate welds. The effects of boron content in the shield of electrode on the microstructure, hardness and abrasive resistance of the surfaces were investigated. After surfacing, microstructural analysis including metallographic examination, wavelenght dispersive X-ray(WDX), X-ray, microhardness measuraments and abrasive wear tests were performed. From the results, it was seen that boron content in the coating was effective on the formation of primary and eutectic F2B, and consequently on the hardness. As the boron content in the coating increased the microstructure changed from eutectic structure (Fe2B + -Fe) to primary Fe2B with eutectic + FeB structure the heat input was also relatively effective on the amount of boron content of the coating. Abrasihve wear resistance of the coating increased with the increase in boron content. As a result, from the microstructural observations, WDX and X-ray analysis and microhardness measuraments, it was concluded that boron content of a low carbon steel surface can be increased up to 7,2 wt % by newly developed boron containing shielded metal arc welding electrodes.

İsmail Serkan Gülgen
İş makinaları tırnakları üretiminde kullanılan az alaşımlı çeliklerin ısıl işlemi · 2008 · 112 sayfa.
Danışman: Prof. Dr. Sakin Zeytin
Bu araştırmanı devamına: http://tez2.yok.gov.tr/tez.htm adresinden ulaşabilirsiniz.