Structure and Mechanical Properties of Cu-Alloyed Cast Iron

Abstract

The effect of Cu addition on structure and mechanical properties of the gray cast iron is studied. Copper is showed to affect the graphitization process. Copper content increase up to 6 ... 7 wt. % reduces the depth of the chill layer.With further increase of coppercontent the alloys tendency to chilling effectincreases.When the cast ironcontains from 0 to ~ 7% Cu, inclusions can’t be detected using only optical microscopy. In the cast iron with 14.7% Cu, distribution of inclusions has two peaks: 30 ... 40 ... 150 microns and 160 microns. Out-of-shape cupric inclusions of the size of ~ 1 micron are detected in the ledeburite cementite.Submicron inclusions are observed in the lamellar pearlite colonies. With increase of copper content up to ~ 7 wt. % cast iron hardness and microhardness of pearlite increases.

Obtaining wear-resistant and score-resistant coatings with iron-based powder laser cladding with copper oxide nano-powder adding

“…This paper presents the results of studying the effect of copper oxide nano-particles in the iron-based charge on the intensity of wear and score resistance of coatings obtained with laser cladding. I ron-based alloys doped with copper can be attributed to anti-friction materials [1][2][3][4][5]. A decrease in the coefficient of friction for lowcarbon steel [1] and cast iron [2] was noted when copper is added.…”

“…The decrease in the friction coefficient depend on the concentration of coppercontaining particles ranging in size from several nanometers to tens of micrometers. Such particles can be formed, both during prolonged isothermal annealing of hardened steel [6][7][8][9] and during crystallization of cast iron-carbon alloys [1][2][3][4].…”

“…An additional factor contributing to the growth of the perlite hardness is the isolation in the ferrite gaps of nano-dimensional particles of the ε-phase. In sliding friction with lubrication, the wear resistance of hypereutectoid steel containing 8.97% copper is by ~23% higher than that of antifriction cast iron АЧС- 1 С плавы на основе железа, легированные медью, можно отнести к антифрикционным материалам [1][2][3][4][5], Отмечено уменьшение коэффициента трения для низкоуглеродистой стали [1] и чугуна [2] при введении в их состав меди. На снижение коэффициента трения оказывает влияние концентрация медьсодержащих частиц размером от нескольких нанометров до десятков микрометров.…”

“…На снижение коэффициента трения оказывает влияние концентрация медьсодержащих частиц размером от нескольких нанометров до десятков микрометров. Такие частицы могут быть сформированы как при длительных изотермических отжигах закаленной стали [6][7][8][9], так и в процессе кристаллизации литых железоуглеродистых сплавов [1][2][3][4].…”

Archives of Foundry Engineering

“…Although it promotes carbides in heavy sections. It segregates at grain boundaries and consequently increases hardenability [11][12][13][14][15][16].…”