A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
CUTTING TOOL MADE OF CUBIC CRYSTAL BORON NITRIDE BASED ULTRAHIGH PRESSURE SINTERED MATERIAL
PROBLEM TO BE SOLVED: To provide a cutting tool made of cubic crystal boron nitride based ultrahigh pressure sintered material excellent in chipping resistance in cutting processing of steel or cast iron.SOLUTION: A cutting tool made of cubic crystal boron nitride based ultrahigh pressure sintered material has a content ratio of cubic crystal boron nitride particles of 50 to 85 vol%, favorably 70 to 85 vol% and has the residue essentially comprising aluminum oxide. Therein, when performing measurement with respect to a cross-section of the cubic crystal boron nitride based ultrahigh pressure sintered material, a ratio of the total area occupied by a cubic crystal boron nitride particle group having an area larger than 2.5 times of the average area of the cubic crystal boron nitride particles which can be calculated from the average particle size of the cubic crystal boron nitride particles is set to be larger than 0.1 of the total area of the cubic crystal boron nitride particles and to be 0.35 or less of the total area of the cubic crystal boron nitride particles and, thereby, the chipping resistance is improved.
【課題】鋼や鋳鉄の切削加工において、耐欠損性にすぐれた立方晶窒化ほう素基超高圧焼結材料製切削工具を提供する。【解決手段】 立方晶窒化ほう素粒子の含有割合が５０〜８５体積％、好ましくは、７０〜８５体積％、であり残りが酸化アルミニウムを主体とした立方晶窒化ほう素基超高圧焼結材料製切削工具において、立方晶窒化ほう素基超高圧焼結材料の断面について測定した場合、立方晶窒化ほう素粒子の平均粒径より算出できる立方晶窒化ほう素粒子の平均面積の２．５倍より大きい面積を有する立方晶窒化ほう素粒子群が占める合計面積割合を、立方晶窒化ほう素粒子の総面積の０．１より大きく０．３５以下とすることにより耐欠損性を向上させる。【選択図】 なし
CUTTING TOOL MADE OF CUBIC CRYSTAL BORON NITRIDE BASED ULTRAHIGH PRESSURE SINTERED MATERIAL
PROBLEM TO BE SOLVED: To provide a cutting tool made of cubic crystal boron nitride based ultrahigh pressure sintered material excellent in chipping resistance in cutting processing of steel or cast iron.SOLUTION: A cutting tool made of cubic crystal boron nitride based ultrahigh pressure sintered material has a content ratio of cubic crystal boron nitride particles of 50 to 85 vol%, favorably 70 to 85 vol% and has the residue essentially comprising aluminum oxide. Therein, when performing measurement with respect to a cross-section of the cubic crystal boron nitride based ultrahigh pressure sintered material, a ratio of the total area occupied by a cubic crystal boron nitride particle group having an area larger than 2.5 times of the average area of the cubic crystal boron nitride particles which can be calculated from the average particle size of the cubic crystal boron nitride particles is set to be larger than 0.1 of the total area of the cubic crystal boron nitride particles and to be 0.35 or less of the total area of the cubic crystal boron nitride particles and, thereby, the chipping resistance is improved.
【課題】鋼や鋳鉄の切削加工において、耐欠損性にすぐれた立方晶窒化ほう素基超高圧焼結材料製切削工具を提供する。【解決手段】 立方晶窒化ほう素粒子の含有割合が５０〜８５体積％、好ましくは、７０〜８５体積％、であり残りが酸化アルミニウムを主体とした立方晶窒化ほう素基超高圧焼結材料製切削工具において、立方晶窒化ほう素基超高圧焼結材料の断面について測定した場合、立方晶窒化ほう素粒子の平均粒径より算出できる立方晶窒化ほう素粒子の平均面積の２．５倍より大きい面積を有する立方晶窒化ほう素粒子群が占める合計面積割合を、立方晶窒化ほう素粒子の総面積の０．１より大きく０．３５以下とすることにより耐欠損性を向上させる。【選択図】 なし
CUTTING TOOL MADE OF CUBIC CRYSTAL BORON NITRIDE BASED ULTRAHIGH PRESSURE SINTERED MATERIAL
立方晶窒化ホウ素基超高圧焼結材料製切削工具
YANO MASAHIRO (author) / MIYASHITA YASUSUKE (author) / OHASHI CHUICHI (author)
2015-10-22
Patent
Electronic Resource
Japanese
| European Patent Office | 2017
| European Patent Office | 2019
Cutting tool made of cubic boron nitride-based sintered material
| European Patent Office | 2016
CUTTING TOOL MADE FROM CUBIC BORON NITRIDE-BASED SINTERED MATERIAL
| European Patent Office | 2020
Cutting tool made of cubic boron nitride-based sintered material
| European Patent Office | 2017