JPS5891145A - Titanium oxide-base colored sintered alloy - Google Patents

Abstract

PURPOSE:To provide a colored sintered alloy for decorative articles having a light weight, a beautiful golden color and high hardness by consisting the same of specific ratios of a bound phase of Fe, Ni, Co and a hard phase of TiO. CONSTITUTION:A sintered alloy consisting of a hard phase of TiO having a beautiful golden color and characteristics of high hardness 2-60wt% a bound phase of >=1 kind among Fe, Ni, Co which are effective in improving wettability with said phase, strength, sinterability and compactness, and unavoidable impurities. If necessary, a part of said bound phase may be substituted with about 0.5-40wt% >=1 kind among Ti, Zr, Hf, V, Nb, Ta, W, Cr, Mo, Al, Si, Mn, Cu, B in order to improve sinterability, corrosion resistance and the solid soln. of the bound phase. If the bound phase is below the lower limit, sinterability compactness degrade and in excess of the upper limit, the deformation during sintering increases and the working time in pose stages increases. If the substituting metals such as Ti are below the lower limit, the effect of the corrosion resistance and the strength of the solid soln. is weak and in excess of the upper limit, the sinterability and compactness degrade.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a 7'jalized titanium-based colored sintered alloy suitable for ornamental parts such as watch cases, tie clips, and brooches.

Conventionally, materials for decorative items include stainless steel, stellite,
Brass, aluminum alloy, and other materials were used with mirror-glossy surfaces, all of which have a Vickers hardness of 200.
It has the disadvantage that its surface hardness is low and it is easily scratched by other inorganic substances or hard metals, reducing its decorative value.

In order to compensate for this drawback, in recent years WC, TaO or Ti
e Base hard alloy or TiN coating or 'ric brazing t
-The processed 47N horizontal alloy has come to be used for decorative parts. Although these hard alloys or implant alloys have fully achieved their objectives in terms of improving corrosion resistance and scratch resistance, they have not yet overcome the following drawbacks. do not have.

That is, WC and TaO-based hard base metals are expensive and have a large specific gravity, making them unsuitable for use as portable accessories. Does not fully meet the requirements for decorative effects. In addition, coated base metals have the disadvantage that color tone unevenness occurs on the base surface, rendering them useless as decorative items.

The sintered alloy of the present invention solves the above-mentioned drawbacks, and focuses on TiO, which is a lower oxide of titanium oxide, which is lightweight and inexpensive, and has a beautiful golden color and high hardness. It is a material that takes full advantage of the properties of the alloy and has perfected the properties of the alloy as a dense material for decorative items.

That is, the sintered alloy of the present invention has a beautiful golden color and high hardness properties. N1
, CO [bonded phase 2 to 6]
It is made of a sintered alloy consisting of zero weight ts and inevitable impurities. If necessary, Ti, Zr, If,
V, Nb, Ta, W.

Or%Mo, At, 81, Mn%Ou, B may be substituted 0.5 to 40 times with respect to the gold lI4 bonded phase consisting of 1z or more selected from 81, Mn%Ou, B, if necessary for the history. To 1% of the binder phase, an oxide consisting of one or more selected from At203, Y2O3, ZrO2, and MPO is added to 1% of the binder phase by weight of 0.5 to 25% for the purpose of strengthening corrosion resistance and O dispersion in the binder phase. - It's good to replace it. One of these bonded phases
T1, Zr, Hf, V.

Mb, Ta, W, Or, Mo, Muj, 81
, Mn%Ou.

Metal made of one or more types selected from B and Mut203
, Y2O1, Zr0z, and MfO, even when substituted at the same time, it has effects on sinterability, corrosion resistance, and strengthening of the binder phase.

Instead of the hard phase consisting of T10, TiO1 to 99 is used as a cover, and the golden color of this TiO is not shaken and the bonding phase is melted.
'riN, ZrN useful for sintering properties and wL can properties.

A hard phase consisting of one or more selected from HfN, Tag, Tag, 1 Jbc and 99 to 1 IIS is 40
If the sintered alloy is made of ~98% by weight and one or more binder phases selected from Fe, Ni, and CaO consisting of 2~604:At and unavoidable impurities, the golden color tone can be more easily controlled. Become. Also, TiM and ZrM are included in the hard phase.

If necessary, a part of the bonded phase may contain one or more selected from HfN, Tag, Tag, NbO.
C1Mo%*z, +31, Mn, C! One or more yuzu selected from u, B and/or htzos, l
It is preferable to replace it with one or more strains selected from ZrCHl[0, as the effect will be stronger.

Ti, which is the main component of the hard phase contained in the sintered alloy of the present invention
For O, the ratio of T1 element to 0 element does not have to be 1:l, and even if there is a slight change in color tone due to increase or decrease of 0 element, the O element can be controlled within a stable range as low grade acclimatized titanium. A constant color tone can be obtained by controlling the bonding phase cover and type, and furthermore, 〒iN, ZrN, HfN,
If one or more selected from TaNSTag and N'bO is contained, the color tone can be controlled even more easily.

When the hard phase of the sintered alloy of the present invention contains indentations or verticalizations, TiO is TiN, ZrN, or HfM.

TaN%Tag, NbC may exist as a solid solution of oxides, oxycarbides, oxycarbonitrides, and/or as a mixture of 1jTio and nitrides, carbides, or carbonitrides. It's okay.

The sintered alloy of the present invention can also be obtained by ordinary sintering in vacuum or in an inert gas flow at normal pressure.1. It can also be obtained by the pot press method. Furthermore, if necessary, it is also effective as a member for decorative articles to perform a P treatment to increase the density.

Next, the reason for numerically limiting the sintered alloy of the present invention will be described.

(1) Binding phase content If the binding phase content is double-layered, it is relatively @II! If the amount of solid phase exceeds 98% by weight and the amount of hard phase is large, sinterability and compactness will decrease. Furthermore, when the amount of binder phase increases beyond 60% by weight, the hard phase becomes relatively 40% by weight.
As a result, deformation during sintering becomes large and post-process work 4 is required.
Since the space between the layers increases, the amount of binder phase should be 1 to 60% by weight.
I decided.

(2) Amount of metal replacing binder phase Ti, Zr, Hf, V, Nb%Ta, W, Or
.

If the binder phase is replaced with one or more metals selected from Mo, At, 81, Mn, Ou, and B, if the amount is less than 0.5% by weight relative to the binder phase, the corrosion resistance and bath strength will be reduced. The effect is weak, and if the amount exceeds 40% by weight, the sinterability and compactness will deteriorate, so the amount of one metal to be substituted for the binder phase was determined to be α5 to 40% by weight relative to the binder phase. .

(3) Oxide to replace the binder phase If the binder phase is replaced with one or more oxides selected from Altoz, YzOs, Zr01, and MfO, if the binder phase is less than α5 weight, the dispersion The effect of strengthening and corrosion resistance is weak, and if the amount exceeds 25*S+, the sinterability and compactness will decrease, so the amount of oxide to be replaced with the binder phase is determined to be 0.5 to 25*S+. Ta.

The present invention will be specifically explained below according to examples of the present invention.

As example raw material powders, T10, a solid solution of TiO and other compounds, carbide, snowride, oxide, and each birch metal powder were prepared,
All of these raw material powders were used to formulate each sample in the proportions shown in Table 1, and paraffin and amethane were added thereto, pulverized and mixed in a ball mill, and then dried. This mixed powder was molded with a pressure of 2 t/ad to form a powder of 10-1 to 1O-
Sintering is performed at various temperatures of 1250 to 1500°C in a 4-Hf vacuum or by a pot press, and further subjected to HIP treatment if necessary. The sintered body was mirror-polished using a diamond grindstone, and its color tone and hardness were examined and the results are shown in Table 1: 'Ik'.

＼ ＼ ＼ ゝ゛＼ Table 1 From the color tone and hardness shown in Table 1, it can be confirmed that the sintered alloy of the present invention has excellent percent properties as a member for decorative articles. Furthermore, from the hardness percentage shown in Table 1, it can be inferred that it can be used as a cutting tool, a wear-resistant tool, etc.

Claims (1)

[Claims] (11) A hard phase consisting of a binder phase of 2 to 60 tS selected from 11Fe, Ni, and CO and the remainder TiO, and a titanium oxide group characterized by unavoidable impurities. Colored sintered alloy. (2) T1 for the 1i't-cough bonding phase of the above bonding phase,
Zr%Hf, V, Wb, Ta, W, Or%M
o, Aj. One or more types of gold selected from Sl, Mn, Cu, and B@
It was replaced by 0.5 to 40 mm.
A titanium oxide-based colored sintering kettle according to item 1 of category 1 for determining the butt tolerance as a percentage image. (3) Mut203 a part of the above bonded phase to the bonded phase.
, yzos, ZrO2, MfO17)
A titanium oxide-based colored sintered alloy according to claim 1 or 2, characterized in that the titanium oxide-based colored sintered alloy is substituted with 0.5 to 25% by weight of an oxide of Ir. [41Fe, N1, co, fc1 or more bonded phase 2-60 aS and TiO1-99]ll [violet and Tin, ZrN, HfM, Tag% TaC,) JbCO
A titanium oxide-based colored sintered alloy comprising a hard phase of 40 to 98'N violet selected from the group consisting of ls or more of 99 to IJHt and partly mold as an inevitable impurity. (5) 1 m of the above bonded phase is T1 to the bonded phase,
Zr, Hf, V, IN bSTa, W%C! r,
Patent ending range # that is characterized by being replaced by 111 or more gold Jg 0.5 to 4.0 summer it- selected from Mo, Mut181, Mn, Cu, and B! 4. The titanium oxide-based colored sintered alloy according to item 4. (6) Add a part of the above bonded phase to the #bond phase.
, Y2O3, ZrO2, MO, the oxidation described in the AFL paragraph 4 or 5 of the patent application, in which 1 part mold is substituted with 0.5 to 25% by weight of one or more oxides selected from among , Y2O3, ZrO2, MO. Titanium-based colored sintered base metal.