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Titanium-base cermet, coated cermet, and cutting tool

A technology of cermets and base metals, applied in the field of Ti-based cermets, coated cermets, and cutting tools, can solve problems such as wear or defect, surface damage of finishing, and insufficient improvement effect of cermet hardness, and achieve high toughness , Improve the effect of welding resistance

Active Publication Date: 2010-07-28
KYOCERA CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] However, in the method of adding Mn and performing microwave firing as in the above-mentioned Patent Document 1, there is a limit to the improvement of the hardness and toughness of the cermet.
In addition, even in the inclined composition in which the concentration of Mn and the concentration of the binder phase inside the sintered body are increased as in Patent Document 2, the effect of improving the hardness of the surface of the cermet is not sufficient, and there is a problem that the cutting edge is caused by the material being cut. The finish surface of the material to be cut is damaged due to the deposition of the material, and abnormal wear or defect occurs.

Method used

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  • Titanium-base cermet, coated cermet, and cutting tool
  • Titanium-base cermet, coated cermet, and cutting tool
  • Titanium-base cermet, coated cermet, and cutting tool

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0064] Using a stainless steel ball mill and superhard grinding beads, the average particle diameter (d 50 value) TiCN powder with an average particle size of 0.6 μm, WC powder with an average particle size of 1.1 μm, TiN powder with an average particle size of 1.5 μm, TaC powder with an average particle size of 2 μm, MoC powder with an average particle size of 1.5 μm, and average particle size NbC powder with an average particle size of 1.5 μm, ZrC powder with an average particle size of 1.8 μm, VC powder with an average particle size of 1.0 μm, Ni powder with an average particle size of 2.4 μm, and Co powder with an average particle size of 1.9 μm. MnCO with a particle size of 5.0 μm 3 Add isopropanol (IPA) to carry out wet mixing in the mixed powder that powder is adjusted in the ratio shown in Table 1, after adding and mixing the paraffin wax of 3 mass %, stamp and form the multi-edged cutter head (throw away tip) tool shape, (a) heating from room temperature to 1200 °C a...

Embodiment 2

[0095] With respect to the cermet multi-edged inserts of Sample Nos. 1 to 11 of Example 1, the atmosphere in the (e) cooling step was changed to the atmosphere in Table 4, and cermets were produced under the same production conditions. The structure of the obtained cermet was observed in the same manner as in Example 1 and is shown in Table 5. In addition, in the depth direction from the surface of the sintered body to the inside, the N content in the inner and surface regions of the cermet was compared by X-ray photoelectron spectroscopic analysis, and the ratio of the N content in the surface region / the inner N content is described in Table 6. . Next, the coating layers shown in Table 6 were formed to obtain multi-edged inserts of Sample Nos. 12 to 18. A cutting test was performed under the same cutting conditions as in Example 1 using the obtained cermet-made multi-blade insert. The results are shown in Table 6 together.

[0096] 【Table 4】

[0097]

[0098] * mark in...

Embodiment 3

[0116] Conditions other than the formulation composition in Table 7 and the conditions in Table 8 were the same as in Example 1, and cermet substrates of Sample Nos. 19 to 31 were obtained.

[0117] 【Table 7】

[0118]

[0119] * mark indicates outside the scope of the present invention

[0120] 1) Raw material composition: MnCO 3 otherwise by mass%

[0121] MnCO 3 Expressed in parts of mass relative to other 100 parts by mass.

[0122] 【Table 8】

[0123]

[0124] * mark indicates outside the scope of the present invention

[0125] The obtained cermet substrate was observed using a scanning electron microscope (SEM). In a 10,000 magnification photograph, each of five random parts on the surface and inside was analyzed in an area of ​​8 μm × 8 μm using commercially available image analysis software. In the image analysis, the existence state of the hard phase and the internal or surface structure state were observed, and the presence or absence of the surface region ...

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Abstract

A titanium-base cermet suitable for use as cutting tools having high chipping resistance and high wearing resistance. The titanium-base cermet (1) comprises: at least one of cobalt and nickel; at least one of carbides, nitrides, and carbonitrides of at least one element which is selected among the metals in Groups 4, 5, and 6 of the periodic table and comprises titanium as the main component; and0.1-0.5 mass% manganese. When a photograph of any section of the cermet taken with a scanning electron microscope (SEM) is examined, then a rigid phase (2) comprising a first rigid phase (2a) and a second rigid phase (2b) and a bonding phase (3) consisting mainly of at least either of cobalt and nickel are observed in an inner part and the second rigid phase (2b) looks whiter than the first rigidphase (2a). Furthermore, a surface part of the section has a surface region 90% by area of which is accounted for by a second rigid phase (2b).

Description

technical field [0001] The present invention relates to a Ti-based cermet, a coated cermet and a cutting tool, in particular to a cutting tool with improved wear resistance of the cutting edge. Background technique [0002] At present, as cutting tools, or wear-resistant parts, sliding parts and other parts that require wear resistance, sliding properties, and chipping resistance, cemented carbide with WC as the main component or Ti-based metals with Ti as the main component Sintered alloys such as ceramics are widely used. With regard to these sintered alloys, development of new compositions aimed at improving their properties has been continuously carried out. [0003] For example, Patent Document 1 discloses a technique for forming cemented carbide or cermet by reaction sintering using microwaves. According to the document, Mn or Al is added to a binder metal phase such as Co in a ratio of 5% by mass or less. [0004] In addition, in Patent Document 2, it is disclosed t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C29/04B23B27/14C22C1/05
CPCB22F7/06C22C2204/00B22F2999/00C22C1/051C22C29/04B22F2005/001B22F2207/01
Inventor 德永隆司木下秀吉
Owner KYOCERA CORP
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