JPH02289192A - Twisted wire - Google Patents

Abstract

PURPOSE:To obtain twisted wires, having a high strength with high fatigue characteristics and suitable as a belt reinforcing material by twisting element wires composed of amorphous metal fine wires under specific conditions. CONSTITUTION:Twisted wires obtained by twisting element wires composed of amorphous metal fine wires (e.g. iron-based amorphous metal fine wires containing 0.01-75atomic% P, C, etc., and 25-99.9atomic% Fe) (preferably having 10-15mum wire diameter), preparing strands, using the plural above-mentioned strands and twisting the strands preferably in the direction opposite to that in preparing the strands under conditions expressed by the formula [d is wire diameter (mum) of the element wires; N is the number of twist (turns) per cm].

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to a stranded wire made of amorphous metal fine wire and having high strength and high fatigue properties.

(Prior art) In recent years, iron-based or cobalt-based amorphous metal thin wires have been obtained, and their excellent mechanical properties (high strength, etc.) have been obtained.

Utilizing its high fatigue properties, attempts are being made to apply it to various industrial materials such as tire cords, belt reinforcement materials, and spring materials.

Regarding the application of iron-based amorphous metal thin wires to tire cords, it is described in JP-A-61-47839 that tire cords with excellent characteristics can be produced using twisted amorphous metal thin wires. There is. Also, JP-A-62-28208
Publication No. 7 describes the application of stranded wire using amorphous metal thin wire to a reinforcing material for rubber articles. Furthermore, Japanese Patent Application Laid-Open No. 63-158233 describes the use of twisted wires made of fine amorphous metal wires in power transmission belts used in vehicle timing belts, etc. It is described that this can be achieved using twisted metal wires.

Regarding the structure of this twisted wire, Japanese Patent Application Laid-open No. 62-282087 uses amorphous metal thin wire and IXn (n:
There is a description of a cord made by twisting four more strands shown in 3゜4.5.7), and the pitch length S of the strands of this cord is S1≧40d (d: wire diameter)
It is also stated that it is desirable for the reinforcing stranded wire with excellent breakability that the pitch length S2 of the cord obtained by twisting the strands to be in the range of 1.4Sl≦82≦2.4S+.

(Problems to be Solved by the Invention) As mentioned above, iron-based or cobalt-based amorphous metal wires have excellent high strength and high fatigue properties, but these properties are not fully utilized in stranded wires. The current situation is that there is no such thing.

That is, as mentioned above, it is described in Japanese Patent Application Laid-Open No. 62-282087. The pinch length Sl of the strand of the cord is S, ≧4Qd (d: wire diameter).

and the pitch length S2 of the cord made by twisting the strands is 1.4S, S5. Examining the strength and fatigue properties of stranded wires that satisfy the condition ≦2.4s.

Both were very poor, and it was found that the problem was that the excellent high strength and high fatigue properties of the amorphous metal thin wire, which is the strand, were not fully utilized.

An object of the present invention is to provide a stranded wire made of amorphous metal fine wire and having high strength and high fatigue properties.

(Means for Solving the Problems) In order to solve the above problems, the present inventors have conducted intensive research and found that the strength and fatigue properties of stranded wires are as follows.

We discovered that the relationship between the wire diameter and the twisting structure of the stranded wires is greatly affected, and based on this knowledge, we limited the wire diameter and twisting structure of the stranded wires to a certain range. The present invention was completed based on the discovery that a stranded wire having excellent high strength and high fatigue properties can be obtained.

In other words, the gist of the present invention is a stranded wire characterized in that the wire is an amorphous metal thin wire, and the wire diameter of the wire and the number of twists of the stranded wire satisfy the following relational expression (1). It is something to do.

10≦dN≦130 (I) [In the formula, d represents the wire diameter (μm) of the strand, and N represents the number of twists (turns) per 1 cm. ] The number of twists of a stranded wire as used in the present invention refers to the reciprocal of the twist length (pitch) P [cml] of the stranded wire.

The conditions expressed by the above relational expression in the present invention are as follows.

Although the number of twists is in a range that is so small that it would be difficult to imagine from the optimal twist structure of a twisted wire made of conventional crystalline metal fine wire,
These are the conditions that must be met in order to obtain a high-strength stranded wire with excellent fatigue properties made of amorphous metal thin wire.
When the dNO value of the above equation exceeds 130, the torsional stress applied to the amorphous metal thin wire, which is the strand, increases, the fatigue properties of the strand are impaired, and the fatigue properties of the stranded wire are also significantly reduced. do. Furthermore, if the dNO value in the above relational expression is smaller than 10, the convergence of the stranded wire will be poor, the fatigue characteristics of the stranded wire will vary, and the practicality of the stranded wire will be reduced.

In the twisted structure of the stranded wire of the present invention, the strands constituting the m-stranded wire are twisted in the same direction.

In addition, it is desirable that the direction in which the twisted wires are twisted is opposite to the direction in which the strands are twisted. This is based on the mechanical stability conditions of the wires and strands that make up the stranded wire, and if the direction in which the strands are twisted and the direction in which the strands are twisted are not opposite, a stranded wire with excellent fatigue properties and high strength cannot be obtained. It tends to disappear.

Regarding the number of twists of the strands (strands of wires twisted together) constituting the twisted wire in the present invention, the number of twists per 1 cm of the strands before being twisted together is S.
It is desirable that the number of twists N per cm of the stranded wire satisfy the relationship expressed by the following equation (n).

S≧N (If) The condition of this equation is also based on the mechanical stability condition of the wire and the strand, and if the number of twists S of the strands before being combined with the twisted wires is smaller than the number of twists N of the twisted wires, then , twisting stress remains in the stranded wire, and the linearity of the stranded wire deteriorates.
Fatigue characteristics deteriorate (depending on injection amount).

The stranded wire of the present invention can be produced using various types of wire twisting machines, such as a ring threading machine and a tubular threading machine.

For example, in the case of a ring threading machine, the thread (amorphous metal thin wire) speed is 10 to 150 m/min, and the spindle rotation speed is 200 m/min.
~4000 r, p, m, S twist or Z twist
After making the twisted strands.

A twisted wire can be produced by using the strands and twisting the strands in a direction opposite to the twisting direction of the strands. By using this ring threading machine, the high-strength stranded wire with excellent fatigue properties according to the present invention can be obtained efficiently and economically.

Examples of the amorphous metal wire used in the present invention include iron group (Fe, Co, Ni) amorphous metal wires.

(i) Any one or two of P, C, Si, B, Ge
0.01 to 35 atomic % for 21Co and Ni
1 to 40 atomic% (3) Cr, Nb+ Ta, v, Mo, h
, 0.01 for any one or two or more of TiI Zr
~15 atomic% (4) Mn, Pd, A1. 8111 Cu, Zn
+ Any one of Cd, Sn+ Sb+ Hf and pt
A non-containing material containing 0.01 to 75 at% of one or more selected from the group consisting of 0.01 to 5 at% of two or more species, the remainder being substantially Fe. A crystalline metal thin wire is preferred.

Also, as a cobalt-based amorphous metal thin wire.

(1) P+ Any one or two or more of C, Si+ B, Ge 0401 to 35 atomic % (21 Fe and Ni one or two or more 0.0
1 to 40 atomic% (0.01 to 15 atomic% of any one or two or more of 31Cr, Nb, Ta, V, Mo, W, Tt, and Zr (4) Mn, Pd, AI+Au, Cu+Zn, Cd
, Sn + Sb, Hf, and pt, containing one or more selected from the group of 0.01 to 5 at% in a content of 0.01 to 75 at%. , and the balance is preferably an amorphous metal wire consisting essentially of Co.

Furthermore, as a nickel-based amorphous metal m-line.

Q) 0.01 to 35 atom% of any one or two or more of P, C, Si, B, and Ge (2) 0 of any one or two or more of Fe and Go
．． 01-40 atomic% f3) Cr, Nb, Ta, ν, Mo, L Ti
+ 0.01 to 15 atom% of one or more of Zr (4) Mn, Pd, AI + Au, Cu, Zn, Cd
, Sn+Sb, Hf, and pt, containing one or more groups selected from the group of 0.01 to 5 at% in a content of o, oi to 75 at%. , an amorphous metal thin wire in which the remainder is substantially made of Ni is preferable.

The wire diameter of the amorphous metal thin wire that becomes the above wire is 10
It is desirable that the thickness is not less than μm and not more than 115 μm. When the wire diameter of the wire is less than 108 m, the strength of the wire is low, and there is a tendency for the wire to break frequently during the milling process.
When the wire diameter exceeds 115 μm, the toughness of the strands constituting the stranded wire tends to deteriorate, and the fatigue characteristics of the stranded wire also tend to deteriorate.

Moreover, the above-mentioned amorphous metal thin wire can also be used after wire drawing, and in this case, cold wire drawing may be performed under the condition of a cross-sectional reduction ratio of 3 to 40%.

(Example) Next, the present invention will be specifically explained using examples.

Example 1 A fine amorphous metal wire with a wire diameter of 125 μm and consisting of 45 atomic % Co, 23 atomic % Fe, 1 atomic % Cr, 9 atomic % Si, and 13 atomic % B was produced by spinning in a rotating liquid. The manufacturing conditions at this time are that the argon gas injection pressure is 4.5
kg/cd, the hole diameter of the quartz nozzle piece at the tip of the spinning nozzle is 0.125+*mΦ, the drum diameter of the 9-rotation drum is 50011IIlΦ, and the rotation speed of the drum is 32Or.

It was p, m.

Next, the obtained amorphous metal wire was cold drawn using a diamond die so that the cross-sectional reduction ratio was 10% to obtain an amorphous metal wire with a wire diameter of 50 μm.

Next, using the obtained amorphous metal thin wire, a strand consisting of 7 strands with a twist count of 0.85 times per cm was produced using a Sung Twister H-10 model manufactured by Kyoritsu Kikai Seisakusho, and the strand was Ring twister H again using 4
- The number of twists per 1 cm is 0 by twisting the wire using the 10 type.
．． Three 80-strand strands were made. The conditions for creating the strand and twisted wire at this time are that the twisting direction of the strand is Z and the twisting direction of the twisted wire is S, and the number of twists of the strand and twisted wire is such that the spindle rotation speed of the threading machine is 220 Or, p, m, stapling, thread speed 30m/
This is what I got as a portion.

A tensile test and a fatigue test were conducted using the obtained stranded wire.

The fatigue test (fatigue characteristics) was conducted using the bending fatigue testing machine shown in Figure 1, with pulley (2) diameter 15B and load (3) 2kg.
The evaluation was made based on the number of times the stranded wire (1) was bent (the number of times the load was raised and lowered) until it broke, which was measured under the conditions of the drive cam (4) at a rotational speed of 18 Or, p, va.

In addition, the strength Fc [kg] of the stranded wire was determined using an Instron tensile tester, sample length 76n+, strain rate 2.5X 1
Breaking strength measured at 0-''/min.

Furthermore, the strength retention rate (%) is a value calculated from the following formula from the strength Ff [kg] of the wires constituting the stranded wire and the number Nf of the wires.

Strength retention rate (%) = 100Fc/(FfNf) The result of the tensile test is that the average strength of the three strands is 18k.
It was g. In addition, the results of the fatigue test (fatigue characteristics) are 3
The average number of bends for a real stranded wire before breaking is 2X10'
It was times.

Comparative Example 1 A thin amorphous metal wire with a wire diameter of 50 μm was obtained in the same manner as in Example 1. Further, the obtained amorphous metal fine wire was twisted using a tubular type twisting machine manufactured by Ishiyama Seisakusho Co., Ltd., and a strand was obtained in which seven strands were twisted together in an S twist and a Z twist.

Three twisted wires having a 7×4 twisted structure were produced in which adjacent strands were twisted in opposite directions.

Here, the structure of the stranded wire is expressed as (number of strands in the strand) x (number of strands).

The number of twists S of the obtained strand was 2.5 times, and the number of twists N of the stranded wire was 1.25 times.

Next, using the obtained stranded wire, a tensile test and a fatigue test were conducted in the same manner as in Example.

As a result, the average strength of the three strands was 17.8 kg.
The results were on the same level as in Example 1, but the average number of bends before breakage was 3×10' times, which was significantly inferior to Example 1.

Examples 2-4. Comparative Examples 2 to 3 After obtaining amorphous metal thin wires with a wire diameter of 50 μm in the same manner as in Example 1, the wires were twisted using a ring twister H-10 model manufactured by Kyoritsu Machinery Co., Ltd. to obtain the twisted structure shown in Table 1. I created three strands each with a .

Next, a tensile test and a fatigue test were conducted in the same manner as in Example 1 using the obtained stranded wire. Here, the fatigue test load is 1
0 kg was used.

The results of the tensile test and fatigue test are also shown in Table 1.

Note that the values in Table 1 are the average values of three twisted wires.

Table 1 As is clear from Table 1, the stranded wire of the present invention that satisfies the specific relational expression (1) has superior strength and fatigue properties compared to Comparative Examples 2 and 3.

Furthermore, in Comparative Example 2, there was a large variation in fatigue properties.

Examples 5-8. Comparative Examples 4-5 Co 45 atomic %, Fe 23 atomic % by rotating liquid spinning method
, 1 atomic % of Cr, 9 atomic % of Si, and 13 atomic % of B were made into amorphous metal thin wires with a wire diameter of 125 μm, and then cold drawn to obtain wire diameters of 8 and 20, respectively. 50
．． 100. A 120 am amorphous metal thin wire was obtained.

Next, using the obtained amorphous metal thin wire, the ring twister H-10 model manufactured by Kyoritsu Kikai Seisakusho was used in the same manner as in Example 1.
Three stranded wires each having the structure shown in Table 1 and 2 were produced.

The obtained stranded wire was subjected to a tensile test and a fatigue test in the same manner as in Example 2.

The results are shown in Table 2.

Note that the strength and fatigue properties in Table 2 are average values for three zero strands.

Table 2 From Table 2, Examples 5 to 8, which are stranded wires of the present invention, are Comparative Example 5.
It is clear that the fatigue properties are superior to that of .

In addition, in Comparative Example 4, the wire was too strong or too weak.

It was not possible to make twisted wires.

(Effects of the Invention) The stranded wire of the present invention fully takes advantage of the excellent high strength and high fatigue properties of the amorphous metal thin wire that is the strand, and has excellent high strength and high fatigue properties.

Therefore, it is very useful as a reinforcing material for various belts.

[Brief explanation of drawings]

FIG. 1 is a schematic diagram of a bending fatigue tester for measuring fatigue properties. l...-stranded wire, 2--pulley, 3--load. 4.--Drive cam

Claims (1)

[Claims] (1) A stranded wire characterized in that the strand is an amorphous metal thin wire, and the wire diameter of the strand and the number of twists of the strand satisfy the following relational expression (I). 10≦dN≦130 (I) [In the formula, d represents the wire diameter (μm) of the strand, and N represents the number of twists (twists) per 1 cm. ]