JPH11115095A - Wear-resistant liner and its manufacture - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent rapid progress of wear in the case that a super-hard wear- resistant sheet is damaged and worn, by adhering through sequentially laminating the super-hard wear-resistant sheet composed of super-hard alloy, an insert sheet as stress relaxation material, and a hard wear-resistant sheet composed of iron and chrome as base material. SOLUTION: A wear-resistant liner 10 is constructed by sequentially laminating super-hard wear-resistant sheet 11 composed of tungsten-cobalt super-hard alloy, an insert sheet 12 composed of copper, a hard wear-resistant sheet 13 composed of high-chrome cast iron, and an iron sheet 14 composed of SS steel. The insert sheet 12 is composed of a copper sheet, where oxygen content of the copper material is, for example 5-10 ppm, and thickness is, for example 2 mm. By controlling oxygen density, generation of oxide is inhibited at the time of diffusion joining of the hard wear-resistant sheet 13 and the super-hard wear-resistant sheet 11 through the insert sheet 12 therebetween. Thereby, stress generated at the time of using between the both sheets are relaxed, and temperature distribution generated by temperature variation or the like becomes uniform.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] The present invention relates to a method for conveying hard raw materials,
The present invention relates to a wear-resistant liner lined at a place requiring wear resistance, such as a moving chute and a crusher, and a method for manufacturing the same.

[0002]

2. Description of the Related Art Conventionally, cemented carbides such as tungsten-cobalt alloys having excellent wear resistance have been formed by joining these cemented carbides to a metal base material such as an iron plate to form a wear-resistant surface and cutting. Widely used as wear-resistant parts such as chips, drawing dies and crushers. As a joining method of such a cemented carbide and a metal base material, for example, a brazing method in which the two are joined via an Ag-based brazing material (silver brazing material) or a copper brazing material, and a pressure heating process are directly performed. There is a diffusion bonding method for bonding both. For example, when a cemented carbide is used as a hammer of a crusher, flux brazing in which a brazing material is joined between the cemented carbide and a metal base material is generally performed.
Japanese Patent Application Laid-Open No. Hei 3-5073 proposes a brazing method in which a cemented carbide, copper as a stress relaxation material, and steel as a metal base material are joined by using a silver solder containing Ti. I have. Further, in a tool such as a cutting tip, a cemented carbide and steel serving as a base material are made of an Fe—Ni alloy (Permall).
oy), or a method of brazing a cemented carbide and steel using a Ni-based amorphous brazing material. In addition, high-chromium cast iron, which is inferior in wear resistance to cemented carbide but inexpensive, is also widely used as a wear-resistant material. As described above, cemented carbide and high chromium cast iron have poor toughness, and therefore, have high toughness by brazing or diffusion bonding (metal base material).
Or a three-layer structure in which an insert plate such as copper is interposed between a cemented carbide or high chromium cast iron and a metal base material (see FIGS. 2 (a) and 2 (b)) As a result, it is used while covering the overall toughness as a wear-resistant part.

[0003]

However, a conventional two-layer structure of a cemented carbide or high chromium cast iron and a metal base material, or a cemented carbide or high chromium cast iron and an insert plate such as copper having toughness, A wear-resistant liner having a three-layer structure with a metal base material has the following problems. FIG.
In the conventional wear-resistant liners 50 and 51 having three layers as shown in FIGS.
2. If the high chromium cast iron 53 is partially worn, the lower metal base material 54 or the insert plate 55 made of copper or the like, which is poor in wear resistance, is exposed on the surface, and thereafter the wear rapidly progresses. There was a problem that the timing was missed and the main body of the apparatus was seriously damaged. The present invention has been made in view of such circumstances, and prevents a rapid progress of wear when a cemented carbide wear-resistant plate made of a cemented carbide or the like is damaged and worn, and is a compact composite having excellent durability. It is an object of the present invention to provide a mold wear-resistant liner and a method for manufacturing the same.

[0004]

According to the present invention, there is provided a semiconductor device comprising:
In the wear-resistant liner described above, a cemented carbide wear-resistant plate made of a cemented carbide, an insert plate serving as a stress relieving material, and a hard wear-resistant plate based on iron and chromium are fixed in a laminated state in order. . The wear-resistant liner according to claim 2 is a hard wear-resistant plate made of a cemented carbide, an insert plate serving as a stress relieving material, and a hard wear-resistant plate made of high manganese steel, high-tensile steel or the like having a Hv of 600 or more. Are sequentially fixed in a laminated state.
The wear-resistant liner according to claim 3 is the wear-resistant liner according to claim 1 or 2, wherein an iron plate is joined to a back surface of the hard wear-resistant plate, and a mounting member is provided on the back surface of the iron plate. I have. The wear-resistant liner according to claim 4 is the wear-resistant liner according to any one of claims 1 to 3, wherein the thickness of the insert plate is 0.2 to less than the thickness of the carbide wear-resistant plate. 0.5 times, and the thickness of the hard wear-resistant plate is 2 to 4 times. The method for producing a wear-resistant liner according to claim 5 includes a cemented carbide wear-resistant plate, an insert plate serving as a stress relaxation material, a hard wear-resistant plate based on iron and chromium, and an iron plate. Are sequentially laminated, and diffusion bonding is performed in a vacuum state or an inert gas atmosphere. The method of manufacturing a wear-resistant liner according to claim 6, wherein the cemented carbide wear-resistant plate made of a cemented carbide, the insert plate used as a stress relaxation material, and a hard material such as a high manganese steel, a high tensile steel, etc., having an Hv of 600 or more. The wear-resistant plate and the iron plate are sequentially laminated, and diffusion-bonded in a vacuum state or an inert gas atmosphere. The method for producing a wear-resistant liner according to claim 7 is the method for producing a wear-resistant liner according to claim 5 or 6, wherein the insert plate has an oxygen content of 1%.
It is an oxygen-free copper plate of 00 ppm or less. The method for producing a wear-resistant liner according to claim 8 is the method according to any one of claims 5 to 7.
In the method for producing an abrasion-resistant liner according to the above item, the diffusion bonding is performed under the following conditions:
~ 1000 ° C, joining time 20 ~ 90 minutes, joining pressure 0.1
It is performed in a range of ２０20 MPa.

[0005] Here, the cemented carbide refers to the periodic table IVa, V
a, VIa group metal carbide powder is sintered with iron, metal of Fe, Co, Ni, including those belonging to cermet consisting of metal carbide and metal as ceramics,
Collectively. Cemented carbides are roughly divided into WC-Co type,
There are two types of WC-TiC-Ta (Nb) C-Co type,
The physical properties can be changed by adjusting the amount of Co, the amount of TiC, the amount of Ta (Nb), the amount of C, and the particle size of carbide. WC-Co alloys are used as cutting tools for cast iron and non-ferrous metals, wear-resistant tools such as dies, plugs, rolls, crushing rolls, mining tools such as rock drill bits, parts for generating ultra-high pressure, etc. -TiC-Ta (Nb) CC
o alloys are mainly used for steel cutting tools.

The insert plate serving as a stress relaxation material is located between the hard wear-resistant plate and the hard wear-resistant plate having a small elongation and a small toughness. It has a function of absorbing and mitigating the difference in expansion and contraction, and a metal with high toughness and high ductility, for example, copper, aluminum, zinc, tin, lead, or an alloy thereof can be used. When a copper plate is used as the insert plate, if the oxygen content of the copper plate exceeds 100 ppm, Co ₂ WO ₄ , Cu ₂ O, C
Since oxides such as uO and Cu ₃ O ₄ are generated to lower the bonding strength, it is desirable to use an oxygen-free copper plate having an oxygen content of 100 ppm or less.

[0007] Hard wear-resistant plates based on iron and chromium include high chromium cast iron and chromium steel. High chromium cast iron is a material in which chromium is added to cast iron to improve the mechanical properties of the cast iron, and more alloying elements are added to the cast iron to increase corrosion resistance, heat resistance, low thermal expansion, wear resistance, etc. Is a type of alloy cast iron with special properties. High chromium cast iron having a white cast iron structure and having a chromium content of 12 to 35 wt% is excellent in wear resistance and heat resistance, and has a chromium content of 20 to 35.
High chromium cast iron having a wt% and carbon content of 2.5 wt% has a dense structure and high hardness, and is used for crusher parts, roll guides, extrusion dies, crushing rolls and the like. Also,
Those having a carbon content of 1 to 1.5 wt% are rich in corrosion resistance and are used for sand pumps, sulfide ore roaster parts and the like.
When a steel type made of high manganese steel, high tensile steel or the like is used as a hard wear-resistant plate, its Vickers hardness Hv
Is smaller than 600, the amount of wear after the wear of the super hard wear-resistant plate and the insert plate as the upper layer becomes large,
Overall durability is reduced. Further, if the Vickers hardness Hv exceeds 1500, the material becomes brittle and easily breaks due to an impact force or the like during operation.
The range is from 00 to 1500, preferably from 700 to 900.

If the thickness of the insert plate is less than 0.2 times the thickness of the carbide wear-resistant plate, the stress relaxation effect of the insert plate is undesirably diminished. Increases unnecessarily and decreases the overall strength. If the thickness of the hard wear-resistant plate is less than twice the thickness of the carbide wear-resistant plate, the wear rate after the wear of the cemented wear-resistant plate increases, making it difficult to take the timing of replacement. On the other hand, if the thickness of the hard wear-resistant plate exceeds four times, the total thickness is increased more than necessary, and it becomes difficult to make the wear-resistant liner compact.

The atmospheric pressure (degree of vacuum) in the diffusion bonding is 30 Pa or less, preferably 15 Pa or less. If it exceeds 30 Pa, the voids at the bonding interface will not be filled and the bonding strength will decrease, which is not preferable. The heating temperature at the time of diffusion bonding is in the range of 800 to 1000 ° C., preferably 840 to 1000 ° C.
The temperature is in the range of 940 ° C. If the heating temperature is lower than 800 ° C., diffusion bonding between the cemented carbide and the copper plate or between the copper plate and the hard wear-resistant plate does not sufficiently proceed, which causes separation from the respective bonding interfaces. On the other hand, when the temperature exceeds 1000 ° C., the copper component of the copper plate as the insert material is excessively diffused into the cemented carbide, so that the strength of the cemented carbide is reduced and a part of the cemented carbide is broken. The bonding time (holding time) is preferably 20 to 90 minutes, and more preferably 50 to 70 minutes. If the bonding time is shorter than 20 minutes, sufficient bonding strength cannot be obtained, and if the bonding time is longer than 90 minutes, molecules of each other move excessively to the bonding interface, and the original material strength of the material to be bonded is reduced. Joining pressure (=
(Joining load / joining area) is preferably in the range of 0.1 to 20 MPa, and more preferably 5 to 15 MPa. 0.1MPa
If it is smaller, sufficient bonding strength cannot be obtained, and if it is larger than 20 MPa, the insert plate, such as a copper plate or an iron plate, is easily deformed, and the load on the equipment is undesirably increased.

As described above, since the wear-resistant liner of the present invention is obtained by joining a cemented wear-resistant plate, an insert plate and a hard wear-resistant plate in this order, the surface wear-resistant cemented wear-resistant plate is worn. Even after this, the hard wear-resistant plate remains, preventing the progress of rapid wear, and making the whole a compact wear-resistant part. In addition, if the insert plate is sandwiched between the hard wear-resistant plate and the hard wear-resistant plate and diffusion bonding is performed in a vacuum state or an inert gas atmosphere, the insert plate, a copper plate and a carbide wear-resistant plate, Diffusion of atoms occurs at the joint interface with the wear plate, so that an integrated and strong joint can be obtained. In addition, the part where the insert plate was diffusion bonded
The joining strength can be remarkably increased as compared with the case of joining using a conventional Ag-based brazing material, and the cemented carbide is hardly peeled off by impact load or deformation, and a long life can be achieved.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, embodiments of the present invention will be described with reference to the accompanying drawings to provide an understanding of the present invention. FIG. 1 is a perspective view of a wear-resistant liner according to one embodiment of the present invention. As shown in FIG. 1, a wear-resistant liner 10 according to an embodiment of the present invention includes a cemented wear-resistant plate 11 made of a tungsten-cobalt cemented carbide.
And an insert plate 12 made of copper, a hard wear-resistant plate 13 made of high chromium cast iron, and an iron plate 14 made of steel (SS steel).

The carbide wear-resistant plate 11 is made of tungsten (W)
And a cemented carbide of a cobalt (Co) series, and the chemical composition shown in Table 1 (W: 82.90 wt%, Co: 6.71 w
t%, C: 4.57 wt%, etc.) and has a thickness of 5 mm. Thereby, wear resistance can be added to the wear liner 10. In addition, a cemented carbide other than the tungsten-cobalt-based alloy shown here can also be applied. Tungsten
When a cobalt cemented carbide (WC-Co alloy) is used, the tungsten content is preferably 70 to 98 wt%, and the cobalt content is preferably 2 to 30 wt%. If the content of tungsten is less than 70 wt%, the hardness required for wear resistance is reduced, and if the content is more than 98 wt%, the amount of cobalt serving as a binder required for sintering is insufficient, so that the bonding strength is reduced.
If the cobalt content is less than 2 wt%, the bonding strength of the cemented carbide will be insufficient, and if it exceeds 30 wt%, the required wear resistance will be reduced, which is not preferable.

[0013]

[Table 1]

The insert plate 12 has an oxygen content of 5-1.
It is made of a copper plate having a thickness of 2 mm and made of 0 ppm copper (also referred to as oxygen-free copper). By suppressing the oxygen concentration in this way, it is possible to prevent the formation of oxide when the hard wear-resistant plate 13 and the cemented wear-resistant plate 11 are diffusion-bonded via the insert plate 12. Also, insert plate 1
By interposing 2, the stress acting between the two during use is alleviated, and the temperature distribution and the like due to temperature fluctuations are made uniform. Can be reduced and its durability can be increased. The thickness of this oxygen-free copper plate is 0.5 to 3.0 m.
m, desirably 1.0 to 2.0 mm. 0.5mm
If it is thinner, the buffering effect between the cemented carbide and the metal base material will decrease,
If the thickness is more than 3.0 mm, the oxygen-free copper plate tends to buckle during diffusion bonding, and the amount of deformation of the oxygen-free copper plate increases, which causes a reduction in overall dimensional accuracy.

The hard wear-resistant plate has a chromium content of 25 to 30.
wt%, iron based on chromium, such as high chromium cast iron with a carbon content of 2.1 wt%, or Vickers hardness H
v is a wear-resistant plate having a thickness of 15 mm made of high manganese steel, high-tensile steel or the like having a thickness of 700 to 800,
Finally, it has a function of protecting the iron plate 14 which is a metal base material. For this reason, the wear-resistant liner 10 can be constructed economically without using an unnecessarily expensive cemented carbide. It should be noted that high chromium cast iron has many impurities such as sulfur, oxygen, and hydrogen, and it is generally difficult to mount by welding because carbon dioxide gas is easily generated during welding. For this reason,
When high-chromium cast iron is used as a wear-resistant material, bolts are cast at the time of casting and attached to the machine body. In order to obtain the required life of such high chromium cast iron, 3
The thickness is preferably 0 to 100 mm. Further, in order to increase the hardness of the high chromium cast iron, it is necessary to devise measures such as increasing the chromium content, but this method is expensive. As a means of improving the wear resistance of high chromium cast iron, wear resistance is achieved by simultaneously casting cemented carbide particles in high chromium cast iron and dispersing the cemented carbide particles in a high chromium cast iron matrix. Can also be improved. Such a wear-resistant liner has a problem that when the high chromium cast iron matrix holding the cemented carbide particles wears, the cemented carbide particles fall off, and the wear resistance of the cemented carbide particles is reduced. In order to make full use of the matrix, it is necessary to strengthen the matrix.

The iron plate 14 is a tile-shaped member having a thickness of 9 mm made of a rolled steel material for general structure (SS steel material). On its non-operating surface side (upper side in FIG. 1), a stud bolt 15 having one end made of SS steel material for fixing the iron plate 14 to the chute main body for transporting the sintered ore raw material is screwed.
The other end of (an example of the attachment member) is joined by welding so that the work of attaching and detaching the wear-resistant liner 10 can be easily performed. In this welding, the metal base material is SS
Since it is a steel material, for example, it can be performed extremely easily as compared with a case where the stud bolt 15 is directly attached to hard high chromium cast iron which is difficult to weld. The iron plate 14 has a carbon steel material for machine structure (S-C) in addition to the SS steel material.
In addition to steel materials), non-ferrous metals such as stainless steel, alloy steel, aluminum and copper, and alloys thereof can also be used. The durability of the apparatus can be improved by lining a large number of tile-shaped wear-resistant liners 10 having the above-described configuration in places where the wear is large, such as a crusher and a chute for transporting hard raw materials. .

Next, a method of manufacturing the wear-resistant liner 10 will be described in detail. First, SS which becomes iron plate 14
After cutting, cutting, polishing, rolling, etc., the steel material to a required shape and a required surface roughness, grind the dirt such as rust or other oxide film or oil film adhered to the bonding surface with the hard wear-resistant plate 13. It is removed and cleaned by treatment, pickling, or the like. Also, the hard wear-resistant plate 13, the insert plate 12, and the super hard wear-resistant plate 11 are each processed into required dimensions, and the respective bonding surfaces are finished to required surface roughness and flatness. That is, the gap between the hard wear-resistant plate 13, the insert plate 12 and the carbide wear-resistant plate 11 is, for example, 5
After processing to a thickness of less than μm, the respective bonded surfaces are similarly cleaned. By performing the cleaning treatment in this manner, the bonding surfaces having no oxide film or the like can be brought into contact with each other, and the final bonding strength can be increased in diffusion bonding. Next, the hard wear-resistant plate 13, the insert plate 12, and the super hard wear-resistant plate 11 are sequentially laminated on the prepared iron plate 14, and the diffusion bonding process shown in Table 2 is performed using a diffusion bonding apparatus (not shown). Heat and pressure were applied under the conditions.

[0018]

[Table 2]

Here, the atmospheric pressure (degree of vacuum), the heating temperature, the bonding time, and the bonding pressure under the diffusion bonding conditions are 30 Pa or less, 800 to 1000 ° C.,
For 90 minutes, the pressure is adjusted to be in the range of 0.1 to 20 MPa.
Atmospheric pressure can be controlled by a vacuum pump provided in the diffusion bonding apparatus.
It was maintained at 3 Pa. Note that, in such a vacuum state, an inert gas such as an argon gas is charged in advance as an atmosphere gas, and diffusion bonding can be performed in a reduced-pressure atmosphere. It is also possible to do. The heating temperature is an ambient temperature in a diffusion bonding apparatus (not shown) that holds a laminated body of the iron plate 14, the hard wear-resistant plate 13, the insert plate 12, and the cemented wear-resistant plate 11 constituting the wear-resistant liner 10, Each layer is charged into a diffusion bonding apparatus so that the temperature of each layer is maintained substantially uniform. The heating temperature is set to 9 by using a pressing device (not shown) so as to sandwich the surface of the iron plate 14 and the super hard wear plate 11.
Pressure is applied at a temperature of 00 ° C, and the bonding pressure at each bonding surface is 1
A load is applied to the whole so as to be 0 MPa, and the bonding time is maintained for 60 minutes. As a result, atoms are diffused with each other without excessive plastic deformation, and a strong joint structure can be obtained.

In the wear-resistant liner 10 manufactured under the above conditions, the joining strength between the cemented carbide and the high chromium cast iron, more precisely, the joint strength between the cemented carbide and the copper, and between the copper and the high chromium cast iron The joining strength between them was 250 MPa, and the joining strength between the high chromium cast iron and the iron plate was 200 MPa. Then, when the tile-shaped wear-resistant liner 10 thus obtained was attached to a chute of a belt conveyor that conveys the sintered mass, a two-layer composite liner of a high chromium cast iron and an iron plate (FIG. 2B )), The service life was one month, but it can be used for 12 months.

As described above, the wear-resistant liner according to the embodiment of the present invention is obtained by sandwiching a copper plate between a cemented carbide and high chromium cast iron and performing diffusion bonding in a vacuum atmosphere. Diffusion of atoms occurs at the joining interface between the copper plate and the high chromium cast iron, so that they can be integrally joined firmly. In this way, the wear-resistant liner obtained by diffusion bonding has a relatively high-hardness high-chromium cast iron that remains even after the cemented carbide is worn, preventing the wear from abruptly extending to the machine body. it can. In addition, the diffusion bonding strength of the cemented carbide and copper or copper and high chromium cast iron by diffusion bonding (200
２５０250 MPa) is remarkably larger than the brazing joint strength between a cemented carbide and copper or copper and high chromium cast iron joined by using an Ag-based brazing material, and furthermore, the overall toughness is obtained by interposing an insert plate. Therefore, even if an impact load or deformation occurs on the wear-resistant liner, the cemented carbide is hardly peeled off, and the life of the equipment can be extended.

The embodiment of the present invention has been described above.
The present invention is not limited to these embodiments, and all changes in conditions without departing from the gist are within the scope of the present invention. For example, in the embodiment of the present invention,
The method of simultaneously joining an iron plate, a hard wear-resistant plate, an insert plate, and a cemented wear-resistant plate has been described, but the hard wear-resistant plate and the iron plate are previously welded, diffusion-bonded (solid-phase diffusion bonding, liquid-phase diffusion Bonding), brazing, or the like, and an insert plate and a super hard wear-resistant plate may be arranged on the surface of the hard wear-resistant plate and fixed by diffusion bonding. In addition, a hard wear-resistant plate and a cemented wear-resistant plate are diffusion-bonded via an insert plate, and this composite plate is bonded to a metal base material such as an iron plate using a brazing method, a liquid phase diffusion bonding method, or the like. It is also possible. Further, instead of the high chromium cast iron, a high manganese steel, a high tensile steel, or the like having a Vickers hardness Hv of 600 or more can be used as the hard wear-resistant plate.

[0023]

In the wear-resistant liner according to any one of claims 1 to 4, the cemented carbide wear-resistant plate, the insert plate for relaxing the stress between the metal members to be joined, and the hard wear-resistant plate are provided. Since the hard wear-resistant plates, which are the surface layers, are abraded, the hard wear-resistant plates remain and prevent rapid progress of wear, so that the timing of replacement can be adjusted. Furthermore, since the stress between the hard wear-resistant plate and the hard wear-resistant plate can be relieved by the insert plate and the durability can be improved, the whole can be configured compact. In particular, in the wear-resistant liner according to claim 2,
Since the hard wear-resistant plate made of high manganese steel, high-tensile steel or the like having a hardness of Hv600 or more is provided, it is possible to maintain an appropriate stress relaxation effect and improve the overall durability. Further, in the wear-resistant liner according to claim 3,
Since the iron plate is joined to the back side of the hard wear-resistant plate, and the iron plate is provided with a mounting member, the wear-resistant liner can be easily fixed to another metal member via the mounting member, and the wear-resistant liner is provided. Workability at the time of replacement can be improved. In the wear-resistant liner according to the fourth aspect, the ratio of the thickness of each of the insert plate and the hard wear-resistant plate to the thickness of the cemented wear-resistant plate is set in a specific range, so that the stress relaxation effect of the insert plate is provided. While maintaining the
The timing of replacement can be achieved by adjusting the wear rate after the wear of the super hard wear plate. Further, since the overall thickness does not become unnecessarily large, the wear-resistant liner can be made compact.

According to a fifth aspect of the present invention, there is provided a method for manufacturing a wear-resistant liner, comprising: a cemented wear-resistant plate made of a cemented carbide; an insert plate for relieving stress of a metal member to be joined; Since the iron plates are sequentially laminated and diffusion-bonded in a vacuum state or an inert gas atmosphere, diffusion of atoms occurs at each bonding interface, and a strong bonding structure in which the two are integrated can be obtained. This diffusion-bonded portion can significantly increase the bonding strength as compared with the conventional brazing material using an Ag-based brazing material, and the cemented carbide is peeled off by an impact load or deformation by interposing an insert plate. Since it becomes difficult, it is possible to achieve a longer life of the wear-resistant liner as a component in which an impact force or a load is applied to cause bending. In particular, in the method for producing a wear-resistant liner according to claim 6,
Since a hard wear-resistant plate made of high manganese steel, high-tensile steel or the like having a hardness of v600 or more is used, a wear-resistant liner with high overall durability can be manufactured while maintaining an appropriate stress relaxation effect. In particular, in the method for manufacturing a wear-resistant liner according to claim 7, since an oxygen-free copper plate having a specific range of oxygen content is used for the insert plate, no oxide is generated at each bonding surface during the diffusion bonding process. A predetermined bonding strength can be maintained. In the method for manufacturing a wear-resistant liner according to the eighth aspect, since the atmospheric pressure, the heating temperature, the bonding time, and the bonding pressure in the diffusion bonding are respectively maintained in specific ranges, the bonding state on each bonding surface is optimally maintained. Thus, a wear-resistant liner having a predetermined bonding strength is obtained.

[Brief description of the drawings]

FIG. 1 is a perspective view of a wear-resistant liner according to one embodiment of the present invention.

FIGS. 2A and 2B are explanatory views of a conventional wear-resistant liner.

[Explanation of symbols]

Reference Signs List 10 wear-resistant liner 11 carbide wear-resistant plate 12 insert plate 13 hard wear-resistant plate 14 iron plate 15 stud bolt (mounting member)

Claims (8)

[Claims] 1. A cemented carbide wear-resistant plate made of a cemented carbide, an insert plate used as a stress relaxation material, and a hard wear-resistant plate made of iron and chromium as a base material are fixed in order in a laminated state. Features a wear-resistant liner. 2. A cemented carbide wear-resistant plate made of cemented carbide, an insert plate serving as a stress relaxation material, and a hard wear-resistant plate of Hv600 or more, such as high-manganese steel and high-tensile steel, are sequentially laminated. An abrasion-resistant liner characterized by being fixed by: 3. The wear-resistant liner according to claim 1, wherein an iron plate is joined to a back surface of the hard wear-resistant plate, and a mounting member is provided on the back surface of the iron plate. 4. The thickness of the insert plate is 0.2 to 0.5 times, and the thickness of the hard wear plate is 2 to 4 times the thickness of the super hard wear plate. Any one of 3
A wear-resistant liner according to the item. 5. A vacuum state in which a cemented wear-resistant plate made of cemented carbide, an insert plate serving as a stress relaxation material, a hard wear-resistant plate based on iron and chromium, and an iron plate are sequentially laminated. Alternatively, a method for producing a wear-resistant liner, wherein diffusion bonding is performed in an inert gas atmosphere. 6. A hard wear-resistant plate made of a cemented carbide, an insert plate serving as a stress relaxation material, a hard wear-resistant plate of Hv600 or more, such as a high manganese steel, a high tensile steel, and an iron plate. A method for producing an abrasion-resistant liner, comprising sequentially laminating and diffusion bonding in a vacuum state or an inert gas atmosphere. 7. The insert plate having an oxygen content of 10%.
7. The method for producing a wear-resistant liner according to claim 5, wherein the oxygen-free copper plate is 0 ppm or less. 8. An atmosphere pressure of the diffusion bonding is 30 Pa.
Hereinafter, a heating temperature of 800 to 1000 ° C. and a bonding time of 20 to 9
The method for producing a wear-resistant liner according to any one of claims 5 to 7, wherein the method is performed for 0 minutes at a bonding pressure of 0.1 to 20 MPa.