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HARD METAL ALLOY AND CUTTING TOOL
PROBLEM TO BE SOLVED: To provide a hard metal alloy excellent in loss resistance and a cutting tool.SOLUTION: There is provided a hard alloy having a first hard phase which consists of WC particles, one or more kind of second hard phase which is difference from the first hard phase and consists of at least one metal selected from Group 4, 5 and 6 in the periodic table and at least one kind selected from C, N, O and B and a binding phase which contains at least one kind of iron group metal selected from Co, Ni and Fe and having average particle diameter of the WC particles of over 0.8 μm and 4.0 μm or less, de-β layer on a surface part and satisfying A/B≥1.5, where A is average thickness of the de-β layer and B is average crystal particle diameter of the binding phase in the de-β layer.SELECTED DRAWING: Figure 2
【課題】耐欠損性に優れる超硬合金及び切削工具を提供する。【解決手段】ＷＣ粒子からなる第１硬質相と、前記第１硬質相とは異なり、周期表４，５，６族元素から選ばれる少なくとも１種の金属と、Ｃ，Ｎ，Ｏ及びＢから選ばれる少なくとも１種の元素との化合物からなる１種以上の第２硬質相と、Ｃｏ，Ｎｉ及びＦｅから選ばれる少なくとも１種の鉄族金属を含有する結合相と、を有し、前記ＷＣ粒子の平均粒径が０．８μｍ超４．０μｍ以下であり、表面部に脱β層を備え、前記脱β層の平均厚さをＡ、前記脱β層における前記結合相の平均結晶粒径をＢとするとき、Ａ／Ｂ≧１．５を満たす超硬合金。【選択図】図２
HARD METAL ALLOY AND CUTTING TOOL
PROBLEM TO BE SOLVED: To provide a hard metal alloy excellent in loss resistance and a cutting tool.SOLUTION: There is provided a hard alloy having a first hard phase which consists of WC particles, one or more kind of second hard phase which is difference from the first hard phase and consists of at least one metal selected from Group 4, 5 and 6 in the periodic table and at least one kind selected from C, N, O and B and a binding phase which contains at least one kind of iron group metal selected from Co, Ni and Fe and having average particle diameter of the WC particles of over 0.8 μm and 4.0 μm or less, de-β layer on a surface part and satisfying A/B≥1.5, where A is average thickness of the de-β layer and B is average crystal particle diameter of the binding phase in the de-β layer.SELECTED DRAWING: Figure 2
【課題】耐欠損性に優れる超硬合金及び切削工具を提供する。【解決手段】ＷＣ粒子からなる第１硬質相と、前記第１硬質相とは異なり、周期表４，５，６族元素から選ばれる少なくとも１種の金属と、Ｃ，Ｎ，Ｏ及びＢから選ばれる少なくとも１種の元素との化合物からなる１種以上の第２硬質相と、Ｃｏ，Ｎｉ及びＦｅから選ばれる少なくとも１種の鉄族金属を含有する結合相と、を有し、前記ＷＣ粒子の平均粒径が０．８μｍ超４．０μｍ以下であり、表面部に脱β層を備え、前記脱β層の平均厚さをＡ、前記脱β層における前記結合相の平均結晶粒径をＢとするとき、Ａ／Ｂ≧１．５を満たす超硬合金。【選択図】図２
HARD METAL ALLOY AND CUTTING TOOL
超硬合金及び切削工具
KIDO YASUKI (author) / YAMAMOTO TSUYOSHI (author) / TSUDA KEIICHI (author)
2017-05-25
Patent
Electronic Resource
Japanese