Unlock instant, AI-driven research and patent intelligence for your innovation.

Surface coating cutting tool

A cutting tool and surface coating technology, which is applied in the field of surface coating cutting tools, can solve problems such as chipping and increased wear loss, and achieve the effects of excellent cutting performance and excellent chipping resistance

Active Publication Date: 2014-11-26
MITSUBISHI MATERIALS CORP
View PDF12 Cites 5 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0013] The current situation of the above-mentioned conventional coated tools is as follows: Although the chipping resistance, chipping resistance, and wear resistance can be improved to a certain extent, when they are used for further severe cutting processes such as carbon steel and alloy steel, it is easy to Chipping occurs, or wear loss increases, and this is the reason for reaching the service life in a relatively short period of time

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 more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Surface coating cutting tool
  • Surface coating cutting tool
  • Surface coating cutting tool

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0084] As raw material powders, medium-coarse WC powder with an average particle size of 5.5 μm, fine-grained WC powder with an average particle size of 0.8 μm, TaC powder with an average particle size of 1.3 μm, NbC powder with an average particle size of 1.2 μm, ZrC powder with an average particle size of 1.2 μm, Cr with an average particle size of 2.3 μm 3 C 2 Powder, VC powder with an average particle size of 1.5 μm, (Ti, W)C [TiC / WC=50 / 50 in mass ratio] powder with an average particle size of 1.0 μm, and Co powder with an average particle size of 1.8 μm . These raw material powders were blended into the blending compositions shown in Table 5, paraffin wax was added, ball milled in acetone for 24 hours, and dried under reduced pressure. Thereafter, extrusion and stamping are performed under a pressure of 100 MPa into various green compacts of specified shapes, and the obtained green compacts are heated to a temperature within the range of 1370-1470 °C at a heating rate o...

Embodiment 2

[0134] As raw material powders, WC powder, TiC powder, ZrC powder, VC powder, TaC powder, NbC powder, Cr 3 C 2 powder, TiN powder, TaN powder and Co powder. These raw material powders were blended into the blending compositions shown in Table 1, wet-mixed with a ball mill for 72 hours, dried, and then press-molded under a pressure of 100 MPa to form a green compact. The obtained green compact was sintered in a vacuum of 6 Pa at a temperature of 1400°C for 1 hour. After sintering, the edge of the blade was ground with R: 0.03 and finely ground. , thereby forming tool substrates 6 to 10 made of WC-based cemented carbide having an insert shape according to ISO standard·SNGA120408.

[0135] Then, ultrasonically clean the surfaces of these tool substrates (blade blades) 6-10 in acetone, and in a dry state, put them into Figure 2A and Figure 2B In the AIP device shown, a hard clad layer composed of an (Al, Cr)N layer having the composition and target average layer thickness sh...

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

PropertyMeasurementUnit
Average layer thicknessaaaaaaaaaa
The average particle sizeaaaaaaaaaa
Particle sizeaaaaaaaaaa
Login to View More

Abstract

A surface-coating cutting tool in which a hard covering layer having an average thickness of 2-10 µm is formed by deposition on a surface of a tool substrate comprising a tungsten-carbide-based superhard alloy, wherein the surface-coating cutting tool is characterized in that (a) the hard covering layer comprises a composite Al / Cr nitride layer, the ratio of the Cr content in the total amount being 0.2 to 0.5 (atomic ratio), and (b) the hard covering layer formed by deposition in the region of the surface-coating cutting tool from the blade edge on the relief surface of the tool substrate to a position set apart by 100 µm toward the side opposite the relief-surface blade edge on the relief surface has a particulate crystal structure, the average grain size of the particulate crystal grains on the hard covering layer formed in the above region being 0.2 to 0.5 µm. The average grain size of the particulate crystal grains on the boundary in the above region between the tool substrate and the hard covering layer is 0.02 to 0.1 µm smaller than the average grain size of the particulate crystal grains on the hard covering layer, and the diameter-length proportion of crystal grains having a grain size of 0.15 µm or less is no more than 20%.

Description

technical field [0001] This invention relates to a surface-coated cutting tool (hereinafter referred to as a coated tool) in which a hard coating layer exhibits excellent chipping resistance and wear resistance during cutting of carbon steel, alloy steel, or the like. [0002] This application claims priority based on Patent Application No. 2012-047926 filed in Japan on March 5, 2012 and Patent Application No. 2013-40331 filed in Japan on March 1, 2013, and uses the contents thereof here. Background technique [0003] In general, coated tools include indexable inserts that are detachably attached to the tip of a turning tool for turning and face milling of workpieces such as various steels and cast iron, and are used for drilling and cutting of the above-mentioned workpieces, etc. Drills, and integral end mills used for face cutting, grooving, step processing, etc. of the above-mentioned workpieces, etc., and the above-mentioned indexable inserts are known to be detachably i...

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
no application Login to View More
IPC IPC(8): B23B27/14B23B51/00B23C5/16
CPCC23C14/0641C23C14/32C23C14/325C23C14/505Y10T407/27B23B27/14B23B51/00B23B2222/28B23B2224/00B23C5/16B23C2222/28B23C2224/00C23C14/14
Inventor 仙北屋和明田中裕介
Owner MITSUBISHI MATERIALS CORP