Surface-wrapped cutting tool
A cutting tool and surface coating technology, which is applied in the field of surface-coated cutting tools made of cubic boron nitride-based ultra-high pressure sintered materials, can solve problems such as chipping, defects, and inability to give full play to wear resistance, and achieve excellent resistance. Grinding, excellent chipping resistance effect
Active Publication Date: 2011-05-18
MITSUBISHI MATERIALS CORP
View PDF6 Cites 1 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
However, when this is used for high-speed intermittent cutting of high-hardness steel such as hardened steel, intermittent and repeated impact loads act on the cutting edge, but since the adhesion strength between the cBN tool base and the hard coating is insufficient, this The reason is easy to cause chipping and damage, so the service life is reached in a relatively short period of time, and the wear resistance cannot be fully exerted in long-term use
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment
[0057] cBN powder, TiN powder, AlN powder, Ni powder, Al powder, Co powder, and W powder each having an average particle diameter in the range of 0.5 to 4 μm were prepared as raw material powders, and these raw material powders were blended into the blends shown in Table 3. Composition, and after wet mixing with a ball mill for 80 hours and drying, extrusion molding with a pressure of 120MPa into a compact with a size of diameter: 50mm×thickness: 1.5mm, and then in a vacuum atmosphere of pressure: 1Pa, in the range of 900-1300°C After sintering the compact under the condition of maintaining a predetermined temperature within 60 minutes, it is used as a spare sintered body for a blade, and the spare sintered body is prepared separately with Co: 8% by mass, WC: residual composition, and a diameter of 50 mm. × Thickness: WC-based cemented carbide support sheets of 2mm size are stacked, installed in a normal ultra-high pressure sintering device, and set at a predetermined temperatu...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
The invention provides a surface-wrapped cutting tool, which exhibits excellent chipping resistance during the discontinuous cutting for a long time, in response to the poor residual stress which controls a basic tool body made of cubic boron nitride base ultra-high pressure sintered materials and a hard wrapping layer wrapping the surface of the basic tool body. Regarding the surface-wrapped cutting tool, with the hard wrapping layer formed by vapor plating on the surface of the basic tool body made of cubic boron nitride base ultra-high pressure sintered materials, the residual stress values of the basic tool body at the interface between the basic tool body and the hard wrapping layer, and the hard wrapping layer are smaller than -2 GPa, respectively, and the difference between the two residual stress values is smaller than 0.5 Gpa. Preferably, the residual stress values of the hard wrapping layer are distributed towards the surface of the hard wrapping layer in such a manner that the absolute values of residual stresses gradually become smaller.
Description
technical field [0001] The present invention relates to a surface-coated cutting tool made of cubic boron nitride (hereinafter referred to as cBN)-based ultra-high pressure sintered material (hereinafter referred to as cBN coated tool), which acts intermittently on the cutting edge intermittently under impact load The hard coating layer has excellent chipping resistance during cutting and exhibits excellent cutting performance in long-term use. Background technique [0002] In the past, it is known that cBN-based ultra-high pressure sintered materials are used as tool materials with low affinity with the workpiece in the cutting of iron-based workpieces such as steel and cast iron, and there are improvements in wear resistance, A cBN-coated tool in which a hard coating layer is formed by coating the surface of a cBN-based ultra-high pressure sintered material is widely known from the viewpoint of improvement of tool life. [0003] For example, as shown in Patent Document 1,...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More IPC IPC(8): C23C14/24C23C14/06
Inventor 仙北屋和明高冈秀充冈田义一佐伯卓司
Owner MITSUBISHI MATERIALS CORP