JPH0987944A - Fiber sliding part, its production and weaving machine using the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a fiber sliding part greatly improved in abrasion resistance and corrosion resistance and a weaving machine capable of corresponding to a high speed weaving. SOLUTION: This fiber sliding part consists of a tetragonal martensite-based stainless steel and its X ray diffraction intensity ratio in the X ray diffraction of the sliding surface with the fiber satisfies the formula, IA/(IB+IC)>2, where IA, IB and IC express the X ray diffraction intensity ratios of crystal surface groups A (110)+(011)+(101)}, B (002)+(020)+(200)} and C (112)+(121)+(211)} respectively. The total sum of the X ray diffraction intensity ratios of these crystal surface groups A, B and C is ten times or more as much as the X ray diffraction intensity ratio in the crystal surface (420)+(422)+(440)+(531)} of a Cr23 C6 precipitate. This weaving machine is installed with at least one of a dent or a heddle consisting of the fiber sliding material.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fiber sliding contact part such as a reed wing and a heald, a method for manufacturing the same, and a loom using the same.

[0002]

2. Description of the Related Art A loom used for weaving uses various parts that come into sliding contact with warp (warp) and weft (weft), and examples thereof include reed wing and heald. A reed is a component that constitutes a reed, and a large number of reeds are arranged in a comb-like shape and placed in a rectangular frame, and the reeds and the frame are fixed to form the reed.
The reed has a function of adjusting the position of the reed by passing a warp between each reed and pressing the weft to adjust the texture of the cloth. Further, the heald has a thread insertion hole for passing a warp thread in the central portion, and a large number of healds are arranged in parallel and attached to a frame for use. By vertically moving the healds arranged in parallel, a vertical vibration is applied to the warp thread passed through the thread insertion hole.

Since the reeds and healds as described above are used in a state of sliding contact with the warp and weft, it is possible to prevent the sliding contact surface from being worn due to the sliding contact with the warp and the weft. Wear resistance is required. Further, considering the usage conditions of the loom, it is necessary to have not only excellent wear resistance but also excellent corrosion resistance. For example, if the yarn type is polyester or nylon, a water jet loom
loom: WJL) and when the yarn type is cotton, rayon, acetate, bemberg, etc.
t loom: AJL) is mainly used, and it is important that parts used in these looms have excellent corrosion resistance.

In the conventional loom, in consideration of the above-mentioned wear resistance and corrosion resistance, it is general that the reed wing is made of stainless steel SUS 301 and the heald is made of stainless steel SUS 420J2. It was However, WJ
Higher speed is required for both L and AJL, and the requirements for wear resistance and corrosion resistance of reeds and healds are becoming more severe than ever before. For this reason, there is a problem that the above-described reed blades and healds made of conventional materials are not sufficient. Therefore, there is a demand for a loom component having a further excellent wear resistance and corrosion resistance, that is, a fiber sliding contact component.

[0005]

As described above, with the increase in the speed of the loom, the conventional fiber sliding contact parts such as reeds and healds have insufficient wear resistance and corrosion resistance. Is becoming more likely to be consumed.
Therefore, there is a demand for a fiber sliding contact member that is more excellent in wear resistance and corrosion resistance, and further, a loom that can practically cope with a higher speed by using such a part is required.

The present invention has been made to solve the above problems, and an object of the present invention is to provide a fiber sliding contact part having further improved wear resistance and corrosion resistance, and a method for producing the same. Aims to provide a weaving machine capable of coping with high speed by using such a fiber sliding contact part.

[0007]

As described in claim 1, a fiber sliding contact part of the present invention is a fiber sliding contact part having a sliding contact surface with fibers, which is a tetragonal martensitic stainless steel. It is made of steel and has a crystal plane group A {(110) + (011) + (101)} and a crystal plane group B {(002) + (020) + (200 )}, Crystal plane group C {
The X-ray diffraction intensity ratio of (112) + (121) + (211)} is I _A ,
When I _B and I _C , I _A / (I _B + I _C )> 2 is satisfied.

According to a second aspect of the present invention, there is provided a fiber sliding contact part according to the present invention. In the fiber sliding contact part, the total X-ray of the crystal face group A, the crystal face group B and the crystal face group C is further added. The diffraction intensity ratio is the crystal plane of Cr ₂₃ C ₆ precipitate {(420) + (422)
It is characterized in that it is 10 times or more of the X-ray diffraction intensity ratio by + (440) + (531)}.

Further, the method for producing a fiber sliding contact part of the present invention is, as described in claim 4, C0.2 to 1.0% by weight, S
i 1.0 wt% or less, Mn 1.0 wt% or less, Cr 11 to 19 wt%
And at least one selected from Mo, Ni, and Cu in an amount of 2.0% by weight or less in the case of Mo, 5.0% by weight or less in the case of Ni and Cu, and the balance being Fe and unavoidable impurities. System stainless steel, 973 ~
After softening-annealing in the temperature range of 1123K, cold plastic working at a working rate of 50% or more, followed by heating in the temperature range of 1273 to 1323K for a predetermined time, quenching, and further tempering in the temperature range of 423 to 473K. It is characterized by that.

As described in claim 5, the loom of the present invention is provided with at least one of a reed wing and a heald which are the fiber sliding contact parts according to claim 1 or claim 2 described above. I am trying.

[0011]

BEST MODE FOR CARRYING OUT THE INVENTION Modes for carrying out the present invention will be described below.

The fiber sliding contact component of the present invention is basically made of tetragonal martensitic stainless steel.
Here, it is known that martensitic stainless steel is superior in wear resistance, but general martensitic stainless steel cannot obtain sufficient corrosion resistance. Therefore, based on martensitic stainless steel as a base, an intensive research was conducted to improve both wear resistance and corrosion resistance, and the following findings were obtained. In the fiber sliding contact part, wear resistance is required for the part in contact with the fiber, that is, the cross section of the part, and corrosion resistance is required for the orthogonal surface.

That is, when a salt spray test is performed on martensitic stainless steel and the corroded surface is observed, the crystal plane forming the surface (corroded surface) is {(100) +
The crystal plane group B of (010) + (001)}, in other words, the crystal plane that remains without being corroded is the closest packed crystal plane group B, and this crystal plane group B has the highest corrosion resistance. I found it. Therefore, when the crystal plane group B is selectively exposed on the surface of the sliding contact part, particularly on the surface orthogonal to the sliding contact surface, the corrosion resistance is improved.

Further, regarding each of the crystal planes of the tetragonal martensitic stainless steel, the wear resistance is {(112)
It was found that the crystal plane group C of + (121) + (211)} functions as a slip plane. Here, the sliding contact surface in contact with the fiber needs to be perpendicular to the slip surface. Therefore, in the present invention, the crystal plane group A is added to the crystal orientation of the fiber sliding contact surface of the fiber sliding contact component.
By selecting {(110) + (011) + (101)} and making the sliding crystal plane group C {(112) + (121) + (211)} orthogonal to the sliding contact surface, wear resistance can be improved. We are trying to improve. further,
The crystal plane group A, the crystal plane group B, and the crystal plane group C are crystallographically orthogonal to each other. Therefore, by orienting the crystal plane group A in the sliding contact surface, the component surface (that is, rolling The crystal plane group B is oriented on the (plate surface), which improves the corrosion resistance as described above.

Based on the above reason, in the fiber sliding contact component of the present invention, the X-ray diffraction intensity ratio of the crystal plane group A, the crystal plane group B and the crystal plane group C by X-ray diffraction of the sliding contact surface with the fiber. I _A ,
I _B and I _C are defined as I _A / (I _B + I _C )> 2. According to the X-ray diffraction intensity ratio of Fe (ASTM: 6-0696), the X-ray diffraction intensity ratio I of the crystal plane group A, the crystal plane group B, and the crystal plane group C in Fe which is not particularly oriented is I. _A , I _B , I
_C is because the _{I A / (I B + I} C) = 100 / (20 + 30) = 2.

In the present invention, the expression of {(100) + (010) + (001)}, which is not represented by {100}, for example, for the crystal plane depends on the amount of the additive element C. Although the c-axis of the tetragonal crystal increases, the a-axis decreases, and the c / a ratio increases, for example, although the X-ray diffraction peak is observed at the same position on the (200) plane and the (020) plane, ( This is because the position of the X-ray diffraction peak of the (002) plane may shift slightly. Therefore, the crystal plane group A includes all (110) planes, (011) planes, and (101) planes, and the same applies to the crystal plane groups B and C.

In the fiber sliding contact component of the present invention, the X-ray diffraction intensity ratio of the total of the crystal plane groups A, B and C on the sliding contact surface with the fiber is such that the crystal plane of the Cr ₂₃ C ₆ precipitate {(420 ) + (422) +
The X-ray diffraction intensity ratio (total) by (440) + (531)} is preferably 10 times or more. This is because when the corrosion resistant component Cr is consumed as Cr ₂₃ C ₆ precipitates, the basic corrosion resistance is impaired. In order to obtain appropriate workability, if tempering is performed after quenching, some Cr ₂₃
C ₆ precipitates, but the total X-ray diffraction intensity ratio of crystal plane groups A, B and C is Cr ₂₃ C ₆ crystal plane {(420) + (422) + (440)
If the X-ray diffraction intensity ratio of + (531)} is 10 times or more, good corrosion resistance can be obtained.

In the X-ray diffraction peak of Cr ₂₃ C ₆ , the X-ray diffraction intensity of the {511} plane is the strongest, but this cannot be separated because it cannot be separated because it overlaps with the crystal plane group A of the stainless steel as the base material. In the invention, the amount of precipitation of Cr ₂₃ C ₆ is defined by the sum of the X-ray diffraction intensity ratios of {(420) + (422) + (440) + (531)}.

The specific composition of the martensitic stainless steel, which is the constituent material of the fiber sliding contact part of the present invention, is C 0.2
~ 1.0 wt%, Si 1.0 wt% or less, Mn 1.0 wt% or less,
Cr 11 to 19% by weight, and further, at least one selected from Mo, Ni and Cu is 2.0% by weight or less in the case of Mo,
In the case of Ni and Cu, it is preferable that the content is 5.0 wt% or less, and the balance is Fe and inevitable impurities.

Here, C is an essential component for imparting wear resistance, and addition of 0.2% by weight or more is necessary for obtaining good wear resistance, but if it is added in excess of 1.0% by weight. Since the workability is reduced, the amount of C added is 0.2 to 1.0 weight.
It is preferably in the range of%. Both Si and Mn are added as deoxidizers, but if they are added in excess of 1.0% by weight, the workability will decrease. Cr is a component that contributes to the improvement of corrosion resistance, and its effect can be sufficiently obtained by adding it in an amount of 11% by weight or more. However,
If added in an excessively large amount, it becomes easy to combine with C to form Cr ₂₃ C ₆ , and the workability is deteriorated. Therefore, the addition amount is preferably 19% by weight or less. Mo, Ni and Cu
Although each contributes to the improvement of corrosion resistance, the hardness decreases when added in a large amount. Therefore, it is preferably 2.0% by weight or less in the case of Mo and 5.0% by weight or less in the case of Ni or Cu.

The fiber sliding contact component of the present invention as described above is
For example, it can be manufactured by passing through the following steps.

That is, first, as in the usual method for producing stainless steel parts, alloy components satisfying the composition ratio as described above are melted and forged, followed by hot rolling and cold rolling. Then, softening annealing is performed in the temperature range of 973 to 1123K. At this time, if the softening / annealing temperature is less than 973K, softening becomes insufficient and cracks occur during the cold plastic working in the next step, while if it exceeds 1123K, the grain size becomes coarse.

Next, cold plastic working is performed at a working rate of 50% or more. If the working ratio of this cold plastic working is less than 50%, the specified crystal plane as described above cannot be obtained even by the following treatment. Specifically, first, cold plastic working is performed at a working rate of 50% or more, and the surface (rolled sheet surface) is aligned with the {100} <110> plane. The steel after this cold plastic working is in α phase (bcc),
By the cold plastic working, {100} planes are gathered on the surface and the <011> direction is gathered in the rolling direction. This is the high temperature γ phase (fc
Even if the anisotropy disappears by holding in (c), the {100} plane of the martensite phase α '(tetragonal) appears on the plate surface by quenching with water cooling or oil cooling from this state. ({100} <110> does not change its orientation even when recrystallized). In this way, the above-described crystal plane defined by the present invention is obtained. Here, if the quenching temperature is too low, sufficient hardness and sufficient corrosion resistance cannot be obtained, and if it is too high, residual austenite occurs and the hardness decreases, so that 1273 to 1
Quenching shall be performed within the temperature range of 323K. Further, the longer the holding time at the high temperature (γ phase), the more the anisotropy disappears,
Since the aggregation of {100} planes is maintained for a short holding time, the holding time at the temperature of 1273 to 1323K is preferably 15 minutes or more per 25 mm.

Since martensitic stainless steel has a poor workability due to quenching and is difficult to be processed into a desired fiber sliding contact part shape, it is necessary to temper it. However,
When tempering at high temperature, as described above, a large amount of Cr ₂₃ C ₆ precipitates and the corrosion resistance decreases, so tempering in the temperature range of 423 to 473 K can suppress the precipitation of Cr ₂₃ C _6. is important. Tempering temperature can not be obtained a sufficient tempering effect is less than 423 K, whereas more than 473K if precipitation of Cr ₂₃ C ₆ becomes prominent, which leads to reduction in the basic corrosion resistance. By tempering at the above temperature, the total X-ray diffraction intensity ratio of the crystal plane groups A, B, and C was determined to be the crystal plane of Cr ₂₃ C ₆ {(420) + (422) + (440) + (531 )} X-ray diffraction intensity ratio can be 10 times or more.

The loom of the present invention is provided with at least one of the reed wing and the heald made of the above-mentioned fiber sliding contact parts, and uses the reed wing and the heald excellent in abrasion resistance and corrosion resistance. As a result, it becomes possible to sufficiently cope with the speedup of the loom.

[0026]

EXAMPLES Next, specific examples of the present invention will be described.

Examples 1 to 7 and Comparative Example 1 After alloying components having the compositions shown in Table 1 were melted and forged, hot rolling and cold rolling were performed. Then 107
After softening annealing at a temperature of 3K, cold plastic working was performed at a working rate of 60%. After this cold plastic working, 1323K showing the γ phase
After holding it for 20 minutes, it was hardened. Then 52
After performing tempering treatment at 3K for 1 hour, reed blades having a thickness of 0.25 mm were produced.

In addition, as Comparative Example 1 with the present invention, using the austenitic stainless steels whose compositions are shown in Table 1, reed blades were similarly produced.

[0029]

[Table 1] When the X-ray diffraction of the fiber sliding contact surface of each of the above-mentioned reeds was performed, the results shown in Table 2 were obtained. Table 2 on the fiber sliding surface crystal plane group A and the crystal plane group B and X-ray diffraction intensity ratio of the crystal plane group C of _{(I A / (I B +} I C)) and these crystal plane group A, B,
X-ray diffraction intensity of total C and crystal plane of Cr ₂₃ C ₆ precipitate {
The ratio of (420) + (422) + (440) + (531)} to the X-ray diffraction intensity is shown.

[0030]

[Table 2] When the salt spray test and the abrasion test were performed on the reed blades of Examples 1 to 7 and the reed blade of Comparative Example 1, the reed blades of Examples 1 to 7 were good in all tests. In contrast, the reed blade according to Comparative Example 1 was excellent in corrosion resistance, but the abrasion resistance was 1/10 or less of that in the above-mentioned Examples.

Reeds were produced using the reeds according to Examples 1 to 7, and a water jet loom (WJL) was assembled using the reeds. When an actual machine test was performed on each of these WJLs, it was confirmed that each of the reeds had sufficient characteristics and life even when operated at high speed. In addition, air jet loom (AJ
The same was true for L).

Examples 8 to 14 Reed blades were produced in the same manner as in Examples 1 to 7 except that the tempering temperature was 823K. When a salt spray test and an abrasion test were carried out on each of these reed blades,
Although each dent was excellent in wear resistance, it was slightly inferior in corrosion resistance to each dent in Examples 1 to 7. When the X-ray diffraction of each reed blade of Examples 8 to 14 was performed, the X-ray diffraction intensity ratio of the crystal plane groups A, B, and C was the same as that of each reed blade of Examples 1 to 7. However, the total X-ray diffraction intensity ratio of the crystal plane groups A, B, and C is the X-ray diffraction intensity of the crystal plane of the Cr ₂₃ C ₆ precipitate {(420) + (422) + (440) + (531)}. It was less than 10 times the ratio.

Comparative Examples 2 to 8 Reed blades were produced in the same manner as in Examples 1 to 7 except that the holding time in the γ phase before quenching was set to 5 minutes and then quenching was performed. Was performed these X-ray diffraction of the sliding surface of each reed dent, the crystal plane group A, B, X-ray diffraction intensity ratio of the _{C (I A / (I B} + I C)) was 2 or less. When a salt spray test and an abrasion test were performed on each of the dents, the dents were inferior in abrasion resistance to the dents of Examples 1 to 7.

Comparative Examples 9 to 15 In the above Examples 1 to 7, the holding time in the γ phase before quenching was set to 5 minutes and then the quenching was performed, and the tempering temperature was changed.
Reed tusks were produced in the same manner except that the temperature was set to 823K. When a salt spray test and an abrasion test were carried out on each of these reed blades, the respective reed blades were inferior in corrosion resistance and wear resistance to the respective reed blades of Examples 1 to 7.
Regarding the corrosion resistance, each reed blade of Comparative Examples 9 to 15 was the most inferior.

In each of the above-described embodiments, the example in which the fiber sliding contact component of the present invention is applied to the reed blade has been described.
The present invention is not limited to this, and can be applied to other loom parts such as healds, and similarly good results can be obtained.

[0036]

As described above, according to the fiber sliding contact component of the first aspect, the fiber sliding contact surface is formed of the specific crystal surface of martensitic stainless steel having excellent wear resistance. In addition, it is possible to improve the corrosion resistance as well as the wear resistance. Moreover, according to the fiber sliding contact component of the second aspect, the corrosion resistance can be further improved. Then, according to the loom of the present invention having such a fiber sliding contact component, it becomes possible to practically cope with the speed increase.

[0037]

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification code Internal reference number FI Technical display location D03C 9/04 D03C 9/04 A D03D 49/62 D03D 49/62 A (72) Inventor Yoshitsune Hisatsune Komukai Toshiba-cho, Saiwai-ku, Kawasaki-shi, Kanagawa, Ltd. Toshiba Research & Development Center, Ltd. (72) Inventor, Noriyuki Miyamoto, No. 8 Shinsugita-cho, Isogo-ku, Yokohama, Kanagawa Prefecture, Toshiba Corporation, Yokohama Works

Claims (5)

[Claims] 1. A fiber sliding contact component having a sliding contact surface with a fiber, which is made of tetragonal martensitic stainless steel and has a crystal surface group A {that is obtained by X-ray diffraction of the sliding contact surface with the fiber. (110) + (011) + (101)}, crystal plane group B {(002)
+ (020) + (200)}, crystal plane group C {(112) + (121) + (2
11)}, where I _A , I _B , and I _C are the X-ray diffraction intensity ratios, I _A / (I _B + I _C )> 2 is satisfied. 2. The fiber sliding contact component according to claim 1, wherein the total X-ray diffraction intensity ratio of the crystal plane group A, the crystal plane group B and the crystal plane group C is Cr ₂₃ C ₆ precipitates. Crystal plane {(42
0) + (422) + (440) + (531)}
Fiber sliding contact parts characterized by 10 times or more. 3. The fiber sliding contact component according to claim 1, wherein the martensitic stainless steel is C 0.2 to 1.0 wt%, Si 1.0 wt% or less, Mn 1.0 wt% or less, Cr 11 to
19% by weight, and at least one selected from Mo, Ni and Cu is 2.0% by weight or less in the case of Mo, Ni and
In the case of Cu, 5.0% by weight or less is contained, and the balance is Fe and inevitable impurities. 4. When C is 0.2 to 1.0% by weight, Si is 1.0% by weight or less, Mn is 1.0% by weight or less, and Cr is 11 to 19% by weight, and at least one selected from Mo, Ni and Cu is Mo. Is 2.0% by weight or less, 5.0% for Ni and Cu
% Of martensitic stainless steel with Fe and unavoidable impurities in the balance, after softening annealing in the temperature range of 973 to 1123K, cold plastic working at a working rate of 50% or more, and then 1273 to 1323K. A method for producing a fiber-sliding component, which comprises heating for a predetermined time in the temperature range, quenching, and then tempering in the temperature range of 423 to 473K. 5. A loom comprising at least one of a reed wing and a heald made of the fiber sliding contact component according to claim 1.