ROCK DRILL INSERT
A rock drill insert comprising a body of cemented carbide comprising hard constituents of WC in a binder phase comprising cobalt; wherein the cemented carbide comprises 4-18 wt% Co; Cr such that the Cr/Co mass ratio in the bulk of the body is 0.04 -0.19; a balance of WC and any unavoidable impuritie...
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Format | Patent |
Language | English French |
Published |
18.01.2024
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Abstract | A rock drill insert comprising a body of cemented carbide comprising hard constituents of WC in a binder phase comprising cobalt; wherein the cemented carbide comprises 4-18 wt% Co; Cr such that the Cr/Co mass ratio in the bulk of the body is 0.04 -0.19; a balance of WC and any unavoidable impurities; wherein content of the binder phase of the cemented carbide is substantially equal throughout the rock drill insert; characterized in that: said insert has a corrected CoM/wt% Co ratio between 0.70-0.81 and the insert is substantially free of eta-phase; wherein said corrected CoM/wt% Co ratio is calculated according to: Corrected CoM/wt% Co = (magnetic-% Co + 1.13 * wt% Cr) / wt% Co where magnetic-% Co is the weight percentage of magnetic Co and wt-% Co and wt-% Cr are the weight percentage of Co and Cr in the cemented carbide, respectively.
La présente invention concerne un insert de perforatrice de roches qui comprend un corps de carbure cémenté comprenant des constituants durs de WC dans une phase liante comprenant du cobalt; le carbure cémenté comprenant de 4 à 18 % en poids de Co; du Cr de telle sorte que le rapport de masse Cr/Co dans la masse du corps soit de 0,04 à 0,19; un reste de WC et d'éventuelles impuretés inévitables; la teneur de la phase liante du carbure cémenté étant sensiblement égale à travers l'insert de perforatrice de roches; caractérisé en ce que : ledit insert présente un rapport de CoM corrigé/% en poids de Co entre 0,70 et 0,81 et l'insert est sensiblement exempt de phase eta; ledit rapport de CoM corrigé/% en poids de Co étant calculé selon : CoM corrigé/% en poids de Co = (% de Co magnétique + 1,13 * % en poids de Cr)/% en poids de Co, le % en poids de Co magnétique étant le pourcentage en poids de Co magnétique et le % en poids de Co et le % en poids de Cr étant le pourcentage en poids de Co et de Cr dans le carbure cémenté, respectivement. |
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AbstractList | A rock drill insert comprising a body of cemented carbide comprising hard constituents of WC in a binder phase comprising cobalt; wherein the cemented carbide comprises 4-18 wt% Co; Cr such that the Cr/Co mass ratio in the bulk of the body is 0.04 -0.19; a balance of WC and any unavoidable impurities; wherein content of the binder phase of the cemented carbide is substantially equal throughout the rock drill insert; characterized in that: said insert has a corrected CoM/wt% Co ratio between 0.70-0.81 and the insert is substantially free of eta-phase; wherein said corrected CoM/wt% Co ratio is calculated according to: Corrected CoM/wt% Co = (magnetic-% Co + 1.13 * wt% Cr) / wt% Co where magnetic-% Co is the weight percentage of magnetic Co and wt-% Co and wt-% Cr are the weight percentage of Co and Cr in the cemented carbide, respectively.
La présente invention concerne un insert de perforatrice de roches qui comprend un corps de carbure cémenté comprenant des constituants durs de WC dans une phase liante comprenant du cobalt; le carbure cémenté comprenant de 4 à 18 % en poids de Co; du Cr de telle sorte que le rapport de masse Cr/Co dans la masse du corps soit de 0,04 à 0,19; un reste de WC et d'éventuelles impuretés inévitables; la teneur de la phase liante du carbure cémenté étant sensiblement égale à travers l'insert de perforatrice de roches; caractérisé en ce que : ledit insert présente un rapport de CoM corrigé/% en poids de Co entre 0,70 et 0,81 et l'insert est sensiblement exempt de phase eta; ledit rapport de CoM corrigé/% en poids de Co étant calculé selon : CoM corrigé/% en poids de Co = (% de Co magnétique + 1,13 * % en poids de Cr)/% en poids de Co, le % en poids de Co magnétique étant le pourcentage en poids de Co magnétique et le % en poids de Co et le % en poids de Cr étant le pourcentage en poids de Co et de Cr dans le carbure cémenté, respectivement. |
Author | LILJA, Mirjam ÅKESSON, Leif TURBA, Krystof BORGH, Ida |
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DocumentTitleAlternate | INSERT DE PERFORATRICE DE ROCHES |
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Snippet | A rock drill insert comprising a body of cemented carbide comprising hard constituents of WC in a binder phase comprising cobalt; wherein the cemented carbide... |
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SubjectTerms | ALLOYS CASTING CHEMISTRY FERROUS OR NON-FERROUS ALLOYS MAKING METALLIC POWDER MANUFACTURE OF ARTICLES FROM METALLIC POWDER METALLURGY PERFORMING OPERATIONS POWDER METALLURGY TRANSPORTING TREATMENT OF ALLOYS OR NON-FERROUS METALS WORKING METALLIC POWDER |
Title | ROCK DRILL INSERT |
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