公开(公告)号：EP3239116A4

公开(公告)日：2018-07-25

申请号：EP15873131

申请日：2015-12-24

申请人： TUNGALOY CORP

发明人： HIRANO YUSUKE ,  SHIRO KENTARO

IPC分类号： C04B35/583 ,  B23B27/14 ,  B23B27/20 ,  C04B35/119 ,  C04B35/5831 ,  C04B35/626 ,  C04B35/63 ,  C04B35/645 ,  C04B41/00 ,  C04B41/50 ,  C04B41/87 ,  C04B41/89 ,  C23C14/18

CPC分类号： C04B35/5831 ,  B23B27/14 ,  B23B27/18 ,  B23B27/20 ,  C04B35/119 ,  C04B35/6262 ,  C04B35/62685 ,  C04B35/6303 ,  C04B35/645 ,  C04B41/009 ,  C04B41/5063 ,  C04B41/5068 ,  C04B41/87 ,  C04B41/89 ,  C04B2235/3217 ,  C04B2235/3225 ,  C04B2235/3244 ,  C04B2235/3246 ,  C04B2235/3813 ,  C04B2235/3826 ,  C04B2235/3839 ,  C04B2235/386 ,  C04B2235/3865 ,  C04B2235/3886 ,  C04B2235/402 ,  C04B2235/5436 ,  C04B2235/6581 ,  C04B2235/785 ,  C04B2235/786 ,  C04B2235/80 ,  C23C14/18 ,  C04B41/4529 ,  C04B41/5061 ,  C04B41/5066 ,  C04B41/5062

摘要： This is to provide a cubic boron nitride sintered body and a coated cubic boron nitride sintered body in which tool life thereof is elongated by improving wear resistance. Provided is a cBN sintered body comprising cBN with 40% by volume or more and 85% by volume or less, a binder phase with 15% by volume or more and 60% by volume or less and inevitable impurities, wherein the binder phase comprises an Al compound comprising an Al element and at least one element selected from N, O and B, and a Zr compound comprising a Zr element and at least one element selected from C, N, O and B, the Zr compound comprises ZrO, or ZrO and ZrO 2 , and in an X-ray diffraction, when an peak intensity of a (111) plane of the ZrO was represented as I 1 , an peak intensity of a (101) plane of tetragonal ZrO 2 was represented as I 2t and an peak intensity of a (111) plane of cubic ZrO 2 was represented as I 2c , then a ratio of the intensity of I 1 based on the total intensities of I 1 , I 2t and I 2c is 0.6 or more and 1.0 or less, and an average grain size of the Al compound is 80 nm or more and 300 nm or less.

公开(公告)号：EP3214059A4

公开(公告)日：2018-06-20

申请号：EP15856133

申请日：2015-10-29

申请人： TUNGALOY CORP

发明人： SHIRO KENTARO

IPC分类号： C04B35/5831 ,  B23B27/14 ,  B23B27/20 ,  C04B35/645 ,  C04B41/00 ,  C04B41/50 ,  C04B41/52 ,  C04B41/87 ,  C04B41/89

CPC分类号： C04B35/5831 ,  B23B27/14 ,  B23B27/148 ,  B23B27/20 ,  B23B2224/04 ,  B23B2226/125 ,  B23B2228/105 ,  C04B35/6261 ,  C04B35/62615 ,  C04B35/6262 ,  C04B35/6264 ,  C04B35/62685 ,  C04B35/6303 ,  C04B35/64 ,  C04B35/645 ,  C04B41/009 ,  C04B41/5068 ,  C04B41/52 ,  C04B41/87 ,  C04B41/89 ,  C04B2235/3217 ,  C04B2235/3225 ,  C04B2235/3246 ,  C04B2235/3804 ,  C04B2235/3813 ,  C04B2235/3839 ,  C04B2235/386 ,  C04B2235/3865 ,  C04B2235/3886 ,  C04B2235/402 ,  C04B2235/5436 ,  C04B2235/5445 ,  C04B2235/5454 ,  C04B2235/549 ,  C04B2235/656 ,  C04B2235/6567 ,  C04B2235/6581 ,  C04B2235/661 ,  C04B2235/785 ,  C04B2235/786 ,  C04B2235/80 ,  C04B2235/96 ,  C04B41/4529 ,  C04B41/5063 ,  C04B41/5062

摘要： The cubic boron nitride sintered body is a cubic boron nitride sintered body comprising 50% by volume or more and 75% by volume or less of a cubic boron nitride (1) and 25% by volume or more and 50% by volume or less of a binder phase and inevitable impurities, the binder phase contains an Al compound (3) and a Zr compound (2), the Al compound (3) contains Al and at least one element selected from the group consisting of N, O and B, the Zr compound (2) contains Zr and at least one element selected from the group consisting of C, N, O and B, and at the polished surface of the cubic boron nitride sintered body, when a number of a plurality of line segments (5) drawn radially at equal intervals from a center of gravity (4) of the Zr compound (2) to a portion other than the Zr compound (2) is made N, and among the line segments (5), at the boundary of the Zr compound and the portion of a composition other than the Zr compound, a number of the line segments (5) at which the Zr compound and the cubic boron nitride are contacting with each other is made n, a number of the Zr compound (2) satisfying a relation of n/N being 0.25 or more and 0.8 or less is 40% or more based on a total number of the Zr compound (2).