JPH06287668A - Vapor deposition material - Google Patents

Abstract

PURPOSE:To produce a vapor deposition material excellent in toughness as well as in workability into wire so that stable vapor deposition conditions can be obtained at the time of vapor-depositing a Co-Ni alloy onto a base film at the production of VTR tape, etc. CONSTITUTION:This alloy is a Co alloy containing <=30wt.% Ni and further containing 0.01-0.1wt.% of elements selected from Mn, Cr, Mg, Zr, and Ca. By this method, superior workability can be obtained without causing deterioration in magnetic properties.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a Co-Ni based alloy or Co used in a process for producing a vapor deposited VTR tape or the like.
The present invention relates to the vapor deposition material.

[0002]

2. Description of the Related Art Co--Ni based alloys or Co have excellent magnetic properties, that is, coercive force and residual magnetic flux density, and therefore have excellent properties as a magnetic recording material. Conventionally, the vapor deposition method is 1
It is carried out in a vacuum chamber evacuated to about 0 ^-5 to 10 ^-6 Torr, and the vapor deposition material in the crucible is irradiated with an electron beam to 20
It was heated to about 00 ° C., melted, evaporated, and deposited on the base film. Here, the vapor deposition material must be replenished for the amount of evaporation, and the replenishment requires about 10 mmφ × 1
It was common practice to drop pellets of 0 to 30 mm into the melt of the crucible.

[0003]

However, in the above-mentioned feeding method, when the pellets are dropped, the surface of the vapor deposition material is disturbed,
Vapor deposition conditions become unstable, such as molten metal scattering and non-uniform temperature distribution inside the molten metal, which hinders the production of stable quality tape.

As a measure against such a problem, it can be considered that a long wire rod is used as the evaporation material, and this is continuously supplied into the crucible to stabilize the vapor deposition conditions and to manufacture a highly reliable tape. In this case, since there is a merit that continuous vapor deposition work can be performed for a long time, there has been a demand for a Co—Ni-based alloy or Co wire rod.

However, since these alloys are difficult-to-work materials, it is extremely difficult to make them long by drawing or the like. As disclosed in JP-A-59-64734, there is a method of adding Fe to a Co-Ni alloy to improve the workability and toughness of the wire rod.
Is contained in an amount of 2 to 10 wt%, deterioration of the excellent magnetic properties, which is a characteristic of the Co—Ni based alloy, cannot be avoided. or,
As disclosed in JP-A-3-236435, there is also a method of improving the toughness by limiting the impurities in the alloy. However, merely suppressing the contents of the impurity elements oxygen, nitrogen and sulfur to low levels does not show sufficient characteristics for wire drawing and the like.

The present invention has been made under such a technical background, and provides a Co-Ni based alloy or a Co vapor deposition material having excellent workability and toughness so that stable vapor deposition conditions can be obtained. The purpose is to do.

[0007]

In order to achieve the above-mentioned object, the vapor deposition material of the present invention is a Co-Ni based alloy or Co containing Ni of 30 wt% or less, and Mn, Cr,
An element selected from Mg, Zr, and Ca is added in an amount of 0.01 to 0.
It is characterized by containing 1 wt%. Here, the element to be selected may be any one element or may be any plural element.

[0008]

The reason for limiting the composition as described above will be described below. First, the reason why the Ni content is limited is that the magnetic characteristics are taken into consideration. That is, in Co-based alloy, 30w
This is because the alloy containing Ni in excess of t% does not show a good residual magnetic flux density, which is a characteristic of a magnetic tape.

Mn, Cr, Mg, Zr and Ca are C
It is an element effective for improving the workability of an o-Ni based alloy or Co. By setting the addition amount to an extremely small amount of 0.01 to 0.1 wt%, the original magnetic characteristics (coercive force, residual magnetic flux density) of the Co—Ni based alloy or Co are not impaired at all. This point is extremely remarkable as compared with the amount of addition of Fe (2 to 10 wt%) in the technique described in JP-A-59-64734.

When the content of the element selected from Mn, Cr, Mg, Zr and Ca is less than 0.01 wt%, sufficient workability (tensile strength 400 MPa or more, drawing 5%, preferably 10% or more) can be obtained. On the contrary, even if it exceeds 0.1 wt%, further improvement in workability cannot be expected, and only impurities are unnecessarily increased. Considering both workability and purity, 0.02 to 0.05 wt% is desirable.

[0011]

【Example】

Example 1 An example of the present invention will be described below.
Co-Ni based alloys of the components shown in Table 1 (No1 to No1
Using 3) as a sample (Example and Comparative Example), its workability and magnetic properties were evaluated.

[0012]

[Table 1]

The sample was hot-rolled to 10.0 mmφ, and the workability was evaluated by its mechanical properties (tensile strength, drawing) at room temperature. In addition, magnetic characteristics (coercive force,
The residual magnetic flux density) was evaluated by vapor-depositing each sample as a vapor deposition material on a base tape. The workability and magnetic properties are shown in FIGS. 1 and 2, respectively. In addition, in FIG.
Indicates tensile strength (TS), Δ indicates reduction (RA), and in FIG. 2, ○ indicates coercive force (Hc) and Δ indicates residual magnetic flux density (Br).

As shown in FIG. 1, improvement in drawing was observed in the Co-Ni based alloy containing 0.01 wt% or more of Mn.
It was confirmed that the workability was improved. On the other hand, if it exceeds 0.1%, the effect of improving the workability hardly changes regardless of the amount of Mn added. Further, as shown in FIG. 2, the magnetic characteristics are hardly deteriorated regardless of the amount of Mn added.

(Example 2) Next, in each sample similar to Example 1, Mg or Ca was added in place of Mn, and the obtained sample was processed (tensile strength, drawing) and magnetic properties (protection). The magnetic force and the residual magnetic flux density) were measured. The relationship between the added amount and each characteristic is shown in FIGS. 3 and 4. In FIG. 3, circles indicate Mg, triangles indicate Ca, white indicates tensile strength, and black indicates stop. Also, in FIG.
The circles indicate Mg, the triangles indicate Ca, the white outline indicates the coercive force, and the black outline indicates the residual magnetic flux density.

Also in the case of this example, as in Example 1, as shown in FIG. 3, the Co—Ni based alloy containing 0.01 wt% or more of Mg or Ca showed an improvement in drawing and workability. It was confirmed that On the contrary, if it exceeds 0.1%, Mg or C
The workability improving effect is almost unchanged regardless of the amount of a added. Further, as shown in FIG. 4, the magnetic characteristics are hardly deteriorated regardless of the added amount of Mg or Ca.

(Example 3) In each sample similar to Example 1, Zr or Cr was added instead of Mn,
The workability (tensile strength, drawing) and magnetic properties (coercive force, residual magnetic flux density) of the obtained sample were measured. The relationship between the added amount and each characteristic is shown in FIGS. In FIG. 5, circles indicate Zr, triangles indicate Cr, of which white indicates tensile strength and black indicates squeezing. Also, in FIG. 6, the circle indicates Z.
r, the triangle indicates Cr, and the white one indicates the coercive force,
Black coating indicates the residual magnetic flux density.

Also in the case of this example, as in Example 1, as shown in FIG. 5, the Co—Ni based alloy containing 0.01 wt% or more of Zr or Cr showed an improvement in drawing and workability. It was confirmed that On the contrary, if it exceeds 0.1%, Zr or C
The effect of improving the workability is almost the same regardless of the addition amount of r. Further, as shown in FIG. 6, there is almost no deterioration in magnetic characteristics regardless of the amount of Zr or Cr added.

(Example 4) Furthermore, in Co alloys having different Ni contents (3 types of Ni content: 1, 20, 30 wt%), the aperture was measured by the same test as in Examples 1 and 2.
The result is shown in FIG. 7. In the figure, circles represent Mn, triangles represent Ca, and squares represent Mg, of which the open areas represent 10% or more of the aperture and the black areas represent less than 10%. As shown in the figure, it was confirmed that the addition of 0.01 wt% or more of the predetermined element improves the drawing and improves the workability.

(Example 5) Next, Mn, Cr, and Mg were added to Co containing no Ni but other constituent elements as in Example 1 to obtain workability (tensile strength, Aperture)
And magnetic properties (coercive force, residual magnetic flux density) were measured. The relationship between the added amount and each characteristic is shown in FIGS. 8 and 9. In FIG. 8, circles represent Mn, triangles represent Cr, squares represent Mg,
Among them, the outline is the tensile strength and the black is the squeeze.
Further, in FIG. 9, circles indicate Zr, triangles indicate Cr, squares indicate Mg, of which white outlines indicate coercive force and black indicates residual magnetic flux density.

Further, the workability and magnetic characteristics when Zr or Ca was added to the same Co were also examined. The result is shown in Figure 1.
0 and FIG. In FIG. 10, the circles indicate Zr, the triangles indicate Ca, the white outline indicates tensile strength, and the black coating indicates diaphragm. Further, in FIG. 11, circles represent Zr, triangles represent Ca, of which white outlines indicate coercive force and black indicates residual magnetic flux density.

Also in the case of this example, as shown in FIGS. 8 and 10, improvement in drawing was observed for Co containing 0.01 wt% or more of Mn, Cr, Mg, Zr or Ca, and the workability was improved. Was confirmed. On the contrary, if it exceeds 0.1%, the effect of improving the workability is almost the same regardless of the amount of the added element. Further, as shown in FIGS. 9 and 11, almost no deterioration of the magnetic characteristics is observed regardless of the amount of the added element.

[0023]

As described above, the vapor deposition material of the present invention contains 0.01 to 0.1 wt% of an element selected from Mn, Cr, Mg, Zr and Ca, and has an extremely excellent cold workability. It is equipped with Therefore, processing such as wire drawing and cutting is easy, and particularly when a wire is used, the vapor deposition material can be continuously replenished. Therefore, the vapor deposition conditions can be stabilized, a high quality vapor deposition film can be formed, continuous operation can be performed for a long time, and effective utilization in the manufacturing field of VTR tapes and the like is expected.

[Brief description of drawings]

FIG. 1 is a graph showing the relationship between the amount of Mn added and workability in a Co—Ni based alloy.

FIG. 2 is a graph showing the relationship between the amount of Mn added and magnetic properties in a Co—Ni based alloy.

FIG. 3 is a graph showing the relationship between the amount of Mg or Ca added and workability in a Co—Ni based alloy.

FIG. 4 is a graph showing the relationship between the amount of Mg or Ca added and the magnetic properties in a Co—Ni based alloy.

FIG. 5 is a graph showing the relationship between the amount of Zr or Cr added and workability in a Co—Ni based alloy.

FIG. 6 is a graph showing the relationship between the amount of Zr or Cr added and the magnetic properties in a Co—Ni based alloy.

FIG. 7 is a graph showing the relationship between the amount of added elements and the reduction in Co alloys having different Ni contents.

FIG. 8 is a graph showing the relationship between the additive element amount and processability in Co containing no Mn, Cr or Mg.

FIG. 9 is a graph showing the relationship between the amount of added elements and magnetic properties in Co containing no Mn, Cr, or Mg added thereto.

FIG. 10 is a graph showing the relationship between the additive element amount and processability in Co containing no Ni and containing Zr or Ca.

FIG. 11 is a graph showing the relationship between the additive element amount and magnetic properties of Co containing no Ni and containing Zr or Ca.

Claims (2)

[Claims] 1. A Co-containing Ni of 30 wt% or less.
A vapor deposition material, which is a Ni-based alloy and contains 0.01 to 0.1 wt% of an element selected from Mn, Cr, Mg, Zr, and Ca. 2. A vapor deposition material comprising Co containing 0.01 to 0.1 wt% of an element selected from Mn, Cr, Mg, Zr and Ca.