Study of properties of cored wire based on ferrochrome gas-cleaning dust

Abstract

Applying of wear-resistant alloyed coatings by build-up welding is one of methods to provide high operation properties of technological, metallurgical in particular equipment. Technologies of strengthening by direct alloying or reducing of alloying materials from oxide phases by reducing agent directly in the arc during building-up are most efficient ones. For build-up, cored wires are used frequently nowadays. A possibility to manufacture cored wires based on ferrochrome production gas-cleaning dust and powders of silicon, aluminum, and aluminum production gas-cleaning dust as reducing agents considered. Chemical composition and relation between cored wires components quoted. Manufacturing of 5 mm diameter wire accomplished at laboratory facility by running through draw plate. Duringestimation of efficiency of the manufactured cored wires application a regime of build-up was selected, study of chemical composition of built-up metal carried-out, wearing tests made, measuring of built-up samples hardness carried-out. Coefficients of chrome recovery coefficient at different relation between filling materials were calculated. Statistical processing of the study results accomplished statistical dependences of components content influence onthe built-up layer properties plotted. Study of the built-up showed, that chrome recovery in the built-up layer depends completely on the cored wire filling coefficient. At that under other conditions being equal, the hardness always correlates with the wear, and increase of chrome concentration results in reduction of the surface wear. Dependents of mass share elements comprising the cored wire content on built-up layer hardness and its wear resistance determined. The dependences obtained can be used for forecasting of builtup layer hardness and its wear resistance while built-up metal chemical composition varying.

Development of a new cored wire based on silica manganese gas-cleaning dust

“…Для определения скорости износа использовался метод, основанный на изменении массы образца при испытании диск -колодка [17,18]. Скорость износа образцов определяли на машине 2070 СМТ1.…”

“…Неметаллические включения оценивались согласно ГОСТ 1778 -70. С помощью оптического микроскопа ОLYMPUS GX51 были изучены микрошлифы без травления [17,18].…”

“…Для этого изучали возможности применения для износостойкой наплавки порошковых проволок, содержащих пыль газоочисток производств силикомарганца (в качестве восстанавливаемого компонента -оксида марганца) и алюминия (в качестве восстановителя). [17,18].…”