KR101594702B1 - HIGH-Mn STEEL BRAKE DISK - Google Patents

Abstract

The present invention relates to a high Mn steel brake disc, and more specifically, to a high Mn steel brake disc comprising high Mn steel for improving braking performance, wear resistance and heat dissipation. To this end, the high Mn steel brake disc comprises: a first disc member having a first disc body, two or more first ridges radially aligned on the first disc body with a certain distance in between and first furrows each of which is formed between adjacent two of the first ridges; and a second disc member having a second disc body, two or more second ridges radially aligned on the second disc body with a certain distance in between and second furrows each of which is formed between adjacent two of the second ridges, wherein the first and second disc members comprise high Mn steel. The first and second disc members are fixed with the first ridges inserted into the second furrows and the second ridges inserted into the first furrows. Meanwhile, the first and second disc members comprise high Mn steel containing, on a weight percent basis, 0.21 to 0.25% C, 15 to 19% Mn and the balance being Fe and incidental impurities.

Description

{HIGH-Mn STEEL BRAKE DISK}

The present invention relates to a high manganese steel brake disk, and more particularly, to a high manganese steel brake disk in which a brake disk is composed of a high manganese steel to improve braking performance, wear resistance and heat radiation characteristics.

BACKGROUND ART [0002] Generally, a brake device mounted on an automobile is a device for reducing the vehicle speed of a running vehicle or switching the vehicle to a completely stopped state. The brake device is normally operated to pressurize the brake pedal, Air is transmitted by a brake mechanism provided on the wheel side, and the brake drum or the brake disk is braked through the transmission.

Generally, a brake disk compresses a brake pad to generate a braking effect. In a conventional brake device, a brake disk, which is in contact with a brake pad and generates a braking force, is generally made of carbon steel.

However, the conventional carbon steel constituting the conventional brake disk has heavy disadvantages due to its specific gravity, which is a main cause of deterioration of fuel efficiency when the carbon steel brake disk is applied to automobiles and the like.

In the case of a conventional brake disk made of carbon steel, there is a problem that corrosion may occur due to environmental conditions such as humidity and temperature of the braking surface of the brake disk.

As described above, it is necessary to develop a brake disk utilizing a material other than carbon steel so as to maintain excellent braking performance, heat radiation performance, and corrosion resistance of the brake and reduce the weight of the brake disk.

In the case of a conventional brake disk, the air vent is formed as an integral type and can be produced by the casting method. Since the brake disk is not configured as a split type, a forging method, which is a production method used when securing high rigidity is required There is a problem that it is impossible to produce by the above.

The present invention is realized by recognizing at least any one of the requirements or problems generated in the conventional brake disk.

In one aspect of the present invention, there is provided a high-manganese steel brake disk in which a brake disk is divided into a plurality of pieces, a brake disk can be produced by a forging method, and excellent physical properties such as abrasion resistance and rigidity are easily secured.

According to one aspect of the present invention, there is provided an air conditioner for an air conditioner, which is capable of firmly coupling a divided disk member by a simple method by engaging a divided disk member by inserting a concave- The present invention is to provide a high manganese steel brake disk which can improve the heat radiation performance and productivity.

In one aspect of the present invention, there is provided a high-manganese steel brake disk capable of improving heat dissipation characteristics, wear resistance, and braking performance by utilizing a high manganese steel having excellent thermal conductivity and abrasion resistance and high friction coefficient as a brake disk .

In one aspect of the present invention, there is provided a high-manganese steel brake disk capable of improving the fuel consumption of a vehicle or the like by making a brake disk lightweight by using a high manganese steel having a lower specific gravity than a general carbon steel to manufacture a brake disk.

According to an aspect of the present invention, there is provided a disc drive apparatus including a first disc body, a plurality of first concave-convex portions radially disposed on the first disc body, A first disc member having a first insert; And a second disk member having a second disk body, a plurality of second concave-convex portions radially spaced apart from the second disk body, and a second insertion portion formed between the adjacent second concave-convex portions, Wherein the first disc member and the second disc member are made of high-manganese steel, the first concavo-convex portion is inserted into the second insertion portion, and the second concavo-convex portion is inserted into the first insertion portion, Wherein the disk member and the second disk member are fixed and the first disk member and the second disk member contain 0.21 to 0.25% of C, 15 to 19% of Mn, and the balance of Fe: inevitably And a high manganese steel which is composed of impurities such as impurities.

Preferably, a height of the first concavo-convex part protruding from the first disc body is formed to be higher than a height of the second concavo-convex part protruded from the second disc body, and the first disc member and the second disc member are formed of the The first concave-convex part and the bottom surface of the second insertion part are in contact with each other, and the air vent, which is a space that is spaced apart from the second concavo-convex part and the first insertion part, is mutually fixed.

Preferably, the first disc main body and the second disc main body are formed with a locking hole formed in a shape in which the brake disc is in contact with the brake pads, respectively, and the locking hole is formed by the first uneven portion and the second locking portion And can be fastened by the fastening member in a state of being in contact with the bottom surface of the first concave-convex portion and the bottom surface of the second insertion portion.

Preferably, the first disc main body and the second disc main body are ring-shaped plate members each having a hollow portion formed therein, and the first concave-convex portion and the second concave-convex portion are radially arranged on the ring-shaped plate- A rod-shaped member having a rectangular cross-section, or a rod-shaped member having a rectangular cross-section and having a constant curvature.

Preferably, the width of the second concave-convex portion is 1.5 to 2.2 times the width of the first concave-convex portion, and the width of the air vent is 1.5 to 2.2 times the width of the first concave-convex portion.

delete

In accordance with another aspect of the present invention, there is provided a disc drive comprising: a first disc main body; a plurality of first concave-convex parts radially spaced apart from the first disc main body; A first disc member having a first insertion portion to be inserted thereinto; And a second disk member having a second disk body, a plurality of second concave-convex portions radially spaced apart from the second disk body, and a second insertion portion formed between the adjacent second concave-convex portions, Wherein the first disc member and the second disc member are made of high-manganese steel, the first concavo-convex portion is inserted into the second insertion portion, and the second concavo-convex portion is inserted into the first insertion portion, Wherein the disk member and the second disk member are fixed and the first disk member and the second disk member contain 0.21 to 0.25% of C, 15 to 19% of Mn, and the balance of Fe: inevitably 0.5 to 0.8% of Si, 7 to 8.5% of Ni, 0.013 to 0.015% of P, 0.002 to 0.0035% of S, and 7.9 to 8.4% of Cr in terms of weight% And a high manganese steel including at least one selected from the group consisting of High manganese steel to provide a brake disk.

In accordance with another aspect of the present invention, there is provided a disc drive comprising: a first disc main body; a plurality of first concave-convex parts radially spaced apart from the first disc main body; A first disc member having a first insertion portion to be inserted thereinto; And a second disk member having a second disk body, a plurality of second concave-convex portions radially spaced apart from the second disk body, and a second insertion portion formed between the adjacent second concave-convex portions, Wherein the first disc member and the second disc member are made of high-manganese steel, the first concavo-convex portion is inserted into the second insertion portion, and the second concavo-convex portion is inserted into the first insertion portion, Wherein the first disk member and the second disk member are composed of 0.21 to 0.25% of C, 15 to 19% of Mn, 0.5 to 0.8% of Si, And a high manganese steel composed of 7 to 8.5% of Ni, 0.013 to 0.015% of P, 0.002 to 0.0035% of S, 7.9 to 8.4% of Cr and the balance of Fe and inevitably included impurities High manganese steel brake discs.

According to one embodiment of the present invention as described above, the split disk member can be firmly coupled by a simple method by engaging the split disk member by inserting the concave-convex portion into the insertion portion, It is possible to form an air vent for improving the performance, thereby improving the heat radiation performance and improving the productivity.

According to an embodiment of the present invention, the brake disk is divided into a split type including the first disk member and the second disk member, and the brake disk can be produced by the forging method, so that it is easy to secure excellent physical properties such as abrasion resistance and rigidity There is an effect.

According to an embodiment of the present invention, when the first concavo-convex part is inserted into the second insertion part and the second concavo-convex part is inserted into the first insertion part, the first disk member and the second disk member By including the fixing structure, the split disk member is coupled by the method of inserting the concave-convex portion into the insertion portion, and the split disk member can be firmly coupled by a simple method.

According to an embodiment of the present invention, in the state that the first concavo-convex portion and the bottom surface of the second insertion portion are in contact with each other, and the air vent, which is a space that is spaced apart from the second concavo-convex portion and the first insertion portion, By including the fixing structure, it is possible to firmly couple the split disk member by a simple method, and at the same time to form an air vent for improving the heat radiation performance, thereby improving the heat radiation performance and improving the productivity .

According to an embodiment of the present invention, the width of the second concavo-convex portion is larger than the width of the first concavo-convex portion, and the width of the air vent is formed to be larger than the width of the first concavo-convex portion, The heat radiation performance of the brake disk is improved, and furthermore, the weight of the brake disk can be lightened as the air vent is formed largely.

According to an embodiment of the present invention, the first disk member and the second disk member are made of a high manganese steel having excellent thermal conductivity and wear resistance and a high friction coefficient, thereby improving the heat dissipation characteristics, wear resistance and braking performance of the brake disk There is an effect that it can be achieved.

According to one embodiment of the present invention, by adopting a split type structure in which the first disk member and the second disk member are divided and fastened by a fastening member, It is possible to manufacture a brake disc utilizing the forging method and the material characteristics of the high manganese steel so that it is easy to secure excellent physical properties such as weight saving of the brake disc, improvement of abrasion resistance, and improvement of braking performance There is an effect that can be done.

According to an embodiment of the present invention, a brake disk is manufactured by utilizing a high manganese steel having a lower specific gravity than a general carbon steel, thereby reducing the weight of the brake disk and improving the fuel efficiency of a vehicle or the like.

1 is an exploded perspective view of a high manganese steel brake disk according to an embodiment of the present invention.
FIG. 2 is a perspective view showing the coupled state of FIG. 1. FIG.
3A is a cross-sectional view taken along the line AA 'in FIG.
3B is a cross-sectional view taken along line BB 'of FIG.
4 is an exploded perspective view of a high manganese steel brake disk according to another embodiment of the present invention.
FIG. 5 is a perspective view showing the engaged state of FIG. 4;
6A is a cross-sectional view in the CC 'direction of FIG.
And FIG. 6B is a cross-sectional view in the DD 'direction of FIG.
FIG. 7 is a graph showing changes in coefficient of friction and coefficient of friction between high manganese steel and general carbon steel applied to an embodiment of the present invention, and changes in thermal conductivity according to temperature. FIG.

Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings. However, the embodiments of the present invention can be modified into various other forms, and the scope of the present invention is not limited to the embodiments described below. Further, the embodiments of the present invention are provided to more fully explain the present invention to those skilled in the art. The shape and size of elements in the drawings may be exaggerated for clarity.

Hereinafter, a high manganese steel brake disk according to an embodiment of the present invention will be described in detail with reference to the drawings.

1 to 7, a high manganese steel brake disk according to an embodiment of the present invention includes a first disk member 100 and a second disk member 200, and further includes an axial coupling portion 300 can do.

1, the high-manganese steel brake disk includes a first disk body 110, a plurality of first concave-convex portions 130 radially spaced apart from the first disk body 110, A first disc member 100 having a first insertion portion 150 formed between the concave and convex portions 130 and a second disc main body 210; And a second disk member 200 having a plurality of second concave-convex parts 230 spaced apart from each other and a second insertion part 250 formed between the adjacent second concave-convex parts 230 .

The first disc member 100 and the second disc member 200 may be formed of high-manganese steel.

At this time, when the first concave-convex part 130 is inserted into the second insertion part 250 and the second concave-convex part 230 is inserted into the first insertion part 150, 100 and the second disk member 200 may be fixed.

The first disk member 100 may include a first disk body 110, a plurality of first concave-convex portions 130, and a first insertion portion 150.

1, the first insert 150 includes a first disc body 110 and a side surface of the first concave-convex part 130 disposed adjacent to both sides of the first disc body 110 It is enclosed space.

As shown in FIGS. 2 and 3B, when the first disc member 100 and the second disc member 200 are coupled, the second concave and convex portion 230 may be inserted into the first insert portion 150 The height of the first inserting portion 150 may be higher than the height of the second concave and convex portion 230.

At this time, in a state where the first disc member 100 and the second disc member 200 are coupled to each other, a part of the first inserting portion 150, into which the second concave-convex portion 230 is inserted, A vent (V) may be formed.

The second disk member 200 may include a second disk body 210, a plurality of second concave-convex portions 230, and a second insertion portion 250.

1, the second insert part 250 includes a second disc body 210 and a side surface of a second concave-convex part 230 disposed adjacent to both sides of the second disc body 210 It is enclosed space.

3A and 3B, the first concave-convex portion 130 may be inserted into the second insertion portion 250, and the height of the second insertion portion 250 may be greater than the height of the first concave- The first concave and convex portion 130 may be formed so as to be lower than the height of the second disk member 100 and the first disk member 100 and the second disk member 200 may be combined have.

1, the first concave-convex part 130 is radially disposed with respect to the center of the first disc body 110, the second concave-convex part 230 is disposed radially with respect to the center of the second disc body 210, As shown in FIG.

A plurality of coupling holes 310 for coupling with the disc main body may be radially formed in the shaft coupling portion 300. [ .

A plurality of coupling holes 115 formed at positions corresponding to the coupling holes 310 formed in the shaft coupling portion 300 may be formed in the disk body and the plurality of coupling holes 115 may be formed in the shaft coupling portion 300 and the first disk body 310 A coupling member such as a bolt (not shown) may be coupled to the coupling holes 310 and 115 to fix the disc main body and the shaft coupling portion 300.

The height of the first concavo-convex part 130 protruding from the first disc body 110 may be higher than the height of the second concavo-convex part 230 as shown in FIGS. 2, 3A, 5, The first disc member 100 and the second disc member 200 are formed to have a height greater than the height protruded from the main body 210. The first disc member 100 and the second disc member 200 are formed to have a height greater than the height protruded from the main body 210, And the air vent V, which is a space in which the second concavoconvex portion 230 and the first insertion portion 150 are spaced apart from each other, is formed.

The first concave-convex part 130 is inserted into the second insertion part 250 and the second concave-convex part 230 is inserted into the first insertion part 150, as shown in FIGS. 1 to 3B, The first disk member 100 and the second disk member 200 are fixed to each other by a simple method in which the split disk member is coupled by the method of inserting the concave- The split disk member can be firmly coupled.

The first concavo-convex part 130 and the second concavo-convex part 230 are in contact with the bottom surface of the second insertion part 250, and the space between the second concavo-convex part 230 and the first insertion part 150, The partitioning disk member can be firmly coupled by the simple method and the air vent V for improving the heat radiation performance can be formed at the same time, Productivity can be improved with improved performance.

The height of the first concave-convex part 130 protruding from the first disc body 110 may be 2 to 2.8 times the height of the second concave-convex part 230 protruding from the second disc body 210. Accordingly, the height of the air vent V can be 1 to 1.8 times as high as the height of the second concave-convex part 230, so that the deterioration of the coupling force of the high-manganese steel brake disk can be prevented and the heat radiation performance can be optimized.

These results indicate that the height of the first concave-convex part 130 protruding from the first disc body 110 and the height of the second concave-convex part 230 protruding from the second disc body 210 are set to various values As a result of the repeated test, it was found that the optimum value for exerting an excellent heat radiation performance within a range in which the deterioration of the cohesion force of the high-manganese steel brake disk does not largely occur.

The height of the first concavo-convex part 130 protruding from the first disk body 110 is not more than twice the height of the second concavo-convex part 230 protruding from the second disk body 210, V) of the high-manganese steel brake disk is excessively reduced, and the heat dissipation performance of the high-manganese steel brake disk is greatly reduced.

When the height of the first concave-convex part 130 protruding from the first disc body 110 is 2.8 times or more the height of the second concave-convex part 230 protruding from the second disc body 210, There is a problem in the bonding strength of the manganese steel brake disc.

3A, a coupling hole is formed in a shape in which the first disc main body 110 and the second disc main body 210 are in contact with the brake pads, respectively, The first concavo-convex part 130 and the second insertion part 250 are disposed at positions where the first concavo-convex part 130 and the second insertion part 250 are in contact with each other, B).

The fastening hole is a hole in which the fastening member B is installed to connect the first disk member 100 and the second disk member 200. The first disk body 110 and the second disk body 210, Or the like.

That is, the fastening member B such as a bolt member is inserted into the fastening hole, and when fastened, the head portion of the bolt member is in contact with the first disk body 110 and the contact surface where the second disk body 210 is in contact with the braking pad, As shown in FIG.

At this time, the fastening hole is formed with a step portion having a diameter corresponding to the diameter of the head portion of the fastening member B and a penetrating portion having a portion having a diameter corresponding to the diameter of the threaded body portion of the fastening member B .

At this time, the height of the flat portion may be higher than the height of the head portion of the fastening member B so that the fastening member B is inserted into the disk body when the fastening member B is fastened to the fastening hole.

The fastening hole may be formed through a separate fastening hole forming process in a state where the first disk member 100 and the second disk member 200 are manufactured by the forging method, And may have an inner diameter of a size corresponding to the outer diameter of the threaded body portion.

As shown in FIGS. 1 and 3A, the fastening holes formed in the first disk body 110 and the second disk body 210 are radially spaced apart from each other by a predetermined distance And a first coupling hole 111 and a second disk body 210 which are formed on the first disk body 110 when the first disk member 100 and the second disk member 200 are superposed and joined together, And the second fastening holes 211 formed in the second fastening holes 211 may be disposed at positions opposite to each other.

1 and 5, the first disc main body 110 and the second disc main body 210 are formed in a ring-shaped plate-like member having hollow portions 113 and 213 formed therein, The concave-convex portion 130 and the second concave-convex portion 230 may be radially arranged on the ring-shaped plate-like member.

Here, as shown in FIG. 1, the first irregular portion 130 and the second irregular portion 230 may be formed as a rod-like member having a rectangular cross-section. In this case, the air vent V formed by coupling the first disk member 100 and the second disk member 200 may have a straight air passage having a rectangular cross section.

As shown in FIG. 5, the first irregular portion 130 and the second irregular portion 230 may be formed as a rod-like member having a rectangular cross section and having a constant curvature. In this case, the air vent V formed by the first disk member 100 and the second disk member 200 is formed into a curved air passage having a rectangular cross section and bent at a predetermined curvature .

The width of the second concavo-convex part 230 may be greater than the width of the first concavo-convex part 130, and the width of the air vent V may be greater than the width of the first concavo-convex part 130 .

The widths of the first irregular portion 130 and the second irregular portion 230 may be the same. Preferably, the width of the second concave-convex portion 230 is larger than the width of the first concave-convex portion 130, and the width of the air vent V is larger than the width of the first concave- .

Since the air vent (V) is largely formed, the heat dissipation performance of the high manganese steel brake disk is improved, and furthermore, the weight of the high manganese steel brake disk is lightened so that the air vent (V) is largely formed.

As described above, since the high manganese steel brake disc is lightweight, the amount of high manganese steel used for manufacturing the brake disc is reduced by the space of the widely formed air vent (V), and the production cost can be reduced. There is an effect that can be done.

Also, there is an effect that the flow of air through the widely formed air vent V is improved, and the heat radiation characteristic of the brake disk is improved.

The width of the second concavo-convex part 230 is 1.5 to 2.2 times the width of the first concavo-convex part 130, and the width of the air vent V is 1.5 to 2.2 In this case, the heat dissipation performance can be optimized while preventing the deterioration of the engaging force of the brake disc.

As a result of repeated testing with setting the width of the second concave-convex portion 230 and the width of the first concave-convex portion 130 to various values, it was found that excellent heat dissipation And the optimal value for performance can be derived.

When the width of the second concave / convex portion 230 is 2.2 times or more the width of the first concave / convex portion 130, there may be a problem in the engagement force of the brake disk.

The first disc member 100 and the second disc member 200 may be formed of high-manganese steel.

When the first disk member 100 and the second disk member 200 are made of high manganese steel, the heat radiation characteristics, wear resistance, and braking performance of the brake disk can be improved.

Specifically, the first disc main body 110 and the second disc main body 210, which are in contact with the brake pads, are made of high-manganese steel having a high coefficient of friction (unit: constant coefficient μ) to improve abrasion resistance and braking performance And the first concavo-convex part 130 and the second concavo-convex part 230 forming the air vent V are composed of high-manganese steel, so that the heat radiation characteristic can be improved.

The first disk member 100 and the second disk member 200 are not entirely made of a high manganese steel but the first disk member 100 and the second disk member 200 are not made of a high manganese steel, The first disc body 110 and the second disc body 210, which are in contact with at least the brake pads, may be formed of high-manganese steel.

When the brake disk is made of high manganese steel, there is a problem that the high manganese steel is inferior in casting composition. Therefore, it is difficult to manufacture a brake disk made of high manganese steel by applying the casting method used for manufacturing brake disk using conventional carbon steel material have.

Therefore, by adopting a method in which the high-manganese steel brake disk is divided into a split type in which the first disk member 100 and the second disk member 200 are separated and fastened by the fastening member B, And it is possible to produce brake discs using the material characteristics of high manganese steel. Therefore, weight saving of brake discs, improvement of abrasion resistance, improvement of braking performance, etc. It is possible to facilitate the securing of the excellent physical properties of the substrate.

The first disk member 100 and the second disk member 200 of the present invention are composed of 0.21 to 0.25% of C, 15 to 19% of Mn, and the balance of Fe and inevitably impurities And the like.

7 (a) is a graph showing the relationship between the content of Fe and inevitably impurities contained in the high manganese steel and the general carbon steel (Fe), which is applied to an embodiment of the present invention, in which 0.21 to 0.25% of C, 15 to 19% of Mn, And a change in friction coefficient depending on the distance.

FIG. 7 (b) is a graph showing the results obtained by using the high manganese steel and the general carbon steel which are composed of 0.21 to 0.25% of C, 15 to 19% of Mn, and the balance of Fe and inevitably included impurities, FIG. 3 is a graph showing a change in thermal conductivity according to temperature of a semiconductor device.

The first disc member 100 and the second disc member 200 are made of high-manganese steel composed of 0.21 to 0.25% of C, 15 to 19% of Mn, and the remainder of Fe and inevitably impurities, The first disc member 100 and the second disc member 200 were formed in a weight percentage of 0.21 to 0.25% of C, 15 to 19% of Mn, respectively, as a result of comparing braking performance, abrasion resistance, %, And the remainder: Fe and inevitably included impurities, the braking performance is 7.2% or more as compared with the case where the first disc member 100 and the second disc member 200 are made of ordinary carbon steel And when the abrasion resistance is improved by 2.9 times or more, the heat radiation performance is improved by 5.4% or more.

The first disk member 100 and the second disk member 200 may contain impurities inevitably contained in the base composition in an amount of 0.21 to 0.25% of C, 15 to 19% of Mn, , And the base composition is selected from the group consisting of 0.5 to 0.8% of Si, 7 to 8.5% of Ni, 0.013 to 0.015% of P, 0.002 to 0.0035% of S and 7.9 to 8.4% of Cr, One or more of which may be included.

The first disk member 100 and the second disk member 200 may contain 0.21 to 0.25% of C, 15 to 19% of Mn, 0.5 to 0.8% of Si, 7 to 8.5 of Ni, , And a high manganese steel composed of P, 0.013 to 0.015%, S: 0.002 to 0.0035%, Cr: 7.9 to 8.4%, and the balance of Fe and inevitably included impurities.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, but, on the contrary, is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the appended claims. And will be apparent to those skilled in the art.

100: first disc member 110: first disc body
111: first fastening hole 113: hollow portion
115: coupling hole 130: first concave-
150: first insertion portion 200: second disk member
210: second disk body 211: second fastening hole
213: hollow portion 230: second concave-convex portion
250: second inserting part 300:
310: coupling hole B: fastening member
V: Air vent

Claims (8)

A first disc member having a first disc main body, a plurality of first concave-convex portions radially spaced from the first disc main body, and a first insert portion formed between adjacent first concave-convex portions;
And a second disk member having a second disk body, a plurality of second concave-convex portions radially spaced apart from the second disk body, and a second insertion portion formed between the adjacent second concave-convex portions,
The first disk member and the second disk member are provided as high-manganese steel,
The first concavo-convex part is inserted into the second insertion part, the first disk member and the second disk member are fixed with the second concavo-convex part inserted into the first insertion part,
Wherein the first disk member and the second disk member comprise a first disk member,
Wherein the high-manganese steel brake disk is made of high-manganese steel which is composed of 0.21 to 0.25% of C, 15 to 19% of Mn, and the balance of Fe and inevitably impurities.
The method according to claim 1,
Wherein a height of the first concavo-convex part protruding from the first disc body is higher than a height of the second concavo-convex part protruding from the second disc body,
Wherein the first disk member and the second disk member comprise a first disk member,
Characterized in that the first concavo-convex part and the bottom surface of the second insertion part are in contact with each other, and the air vent is formed in a space in which the second concavo-convex part and the first insertion part are spaced apart from each other, Brake Discs.
The method according to claim 1,
The first disk body and the second disk body are formed with a fastening hole formed in a shape in which they are in contact with the surfaces of the first disk body and the second disk body,
And the fastening hole is disposed at a position where the first concave-convex part and the second insert part are formed and is fastened by the fastening member in a state of being in contact with the bottom surface of the first concave-convex part and the second insert part. Brake Discs.
The method according to claim 1,
Wherein the first disc body and the second disc body are formed in a ring-shaped plate-like member having a hollow portion therein,
The first concavo-convex portion, and the second concavo-
Wherein the high-manganese steel brake disc is provided with a rod-like member having a rectangular cross-section or a rod-like member having a rectangular cross-section and having a constant curvature, arranged radially in the ring-shaped plate-like member.
3. The method of claim 2,
The width of the second concavo-convex portion is 1.5 to 2.2 times the width of the first concavo-convex portion,
Wherein the width of the air vent is 1.5 to 2.2 times the width of the first concavo-convex portion.
delete A first disc member having a first disc main body, a plurality of first concave-convex portions radially spaced from the first disc main body, and a first insert portion formed between adjacent first concave-convex portions;
And a second disk member having a second disk body, a plurality of second concave-convex portions radially spaced apart from the second disk body, and a second insertion portion formed between the adjacent second concave-convex portions,
The first disk member and the second disk member are provided as high-manganese steel,
The first concavo-convex part is inserted into the second insertion part, the first disk member and the second disk member are fixed with the second concavo-convex part inserted into the first insertion part,
Wherein the first disk member and the second disk member comprise a first disk member,
0.2 to 0.25% of C, 15 to 19% of Mn, and the balance of Fe and inevitably impurities,
At least one selected from the group consisting of 0.5 to 0.8% of Si, 7 to 8.5% of Ni, 0.013 to 0.015% of P, 0.002 to 0.0035% of S and 7.9 to 8.4% of Cr, And a high manganese steel including a high manganese steel including a high manganese steel.
A first disc member having a first disc main body, a plurality of first concave-convex portions radially spaced from the first disc main body, and a first insert portion formed between adjacent first concave-convex portions;
And a second disk member having a second disk body, a plurality of second concave-convex portions radially spaced apart from the second disk body, and a second insertion portion formed between the adjacent second concave-convex portions,
The first disk member and the second disk member are provided as high-manganese steel,
The first concavo-convex part is inserted into the second insertion part, the first disk member and the second disk member are fixed with the second concavo-convex part inserted into the first insertion part,
Wherein the first disk member and the second disk member comprise a first disk member,
The steel sheet according to any one of claims 1 to 3, wherein the steel sheet contains 0.21 to 0.25% of C, 15 to 19% of Mn, 0.5 to 0.8% of Si, 7 to 8.5% of Ni, 0.013 to 0.015% of P, 0.002 to 0.0035% of S, 8.4%, and the remainder: Fe and inevitably contained impurities.

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