JP3000930B2 - Carbide composite wear resistant material with all wear surfaces reinforced and its manufacturing method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement in a composite wear-resistant material for enhancing the wear resistance of a surface facing a wear action of a crusher or the like.

[0002]

2. Description of the Related Art Conventionally, there is a limit to increasing the hardness of a base material in order to strengthen the wear surface of equipment and devices that face wear, including industrial machines such as crushers, kneaders, and crushers. In order to achieve a higher level of wear resistance, a composite method is adopted in which a cemented carbide metal is fixed in a mold in advance, and the base metal is poured into a cast-in state to strengthen only the parts that are most strongly affected by wear. It is heavily used, and the number of disclosures of the prior art relating to its development and improvement is considerable.

The prior art disclosed in Japanese Patent Application Laid-Open No. 64-57963 is an abrasion-resistant material developed especially for a composite casting having abrasion-resistant wear, and a crushed sintered carbide or granular material having a layer thickness of Tcm. In this method, a molten cast iron, which becomes white iron after solidification, is cast at a temperature of 50 ° C. to 180 (1.75 + T) ° C. from its own melting point. As a result, it has excellent resistance to non-impact or low-impact abrasion, especially scratching, abrasion, and sliding abrasion caused by the passage of hard minerals, coal, coke, etc. It claims to have worn materials.

In Japanese Patent Publication No. 7-4655, the diameter is 2
3 mm abrasion-resistant particles are fitted into a mesh plate having perforated holes into which the respective particles are inserted, an adhesive tape is placed on the upper surface to transfer the particles to the tape surface, and a desired sand core having an adhesive layer on the surface is provided. Place, place the adhesive tape containing the particles and transfer the particles to the surface of the sand core,
An impregnation method is proposed in which an adhesive is dried and hardened and fixed, and after hardening, a molten iron is poured to produce an iron product having a wear-resistant surface layer. This method is claimed to be able to be used to produce wear-resistant members with complex wear surfaces, such as rotor housings.

In the prior art of Japanese Patent Publication No. Hei 7-110406, as shown in FIG. 8, a plurality of super-hard metal materials 101 are arranged and embedded at a predetermined interval in a main surface portion of a metal member. A support member 1 which holds a cemented carbide material so as to prevent movement during casting and is embedded in a base material.
02 is shown. In a typical embodiment, a pin or a chip made of a cemented metal member is fitted into a hole of a support member having a large number of holes formed by pressing an iron plate, and the support member is housed in a mold 103 and cast. Pour in metal for use. High manganese steel, high chromium steel, carbon steel, chromium molybdenum cast steel, etc. are applied as casting metals, and cemented carbide is a cemented carbide metal obtained by adding a metal such as cobalt to tungsten carbide, tantalum carbide, etc. Alloys are preferred. Also, pins and chips of cemented carbide may be provided in the direction (side surface) perpendicular to the embedding direction in the figure, or a wire mesh may be used as a support member instead of a perforated iron plate, and pins may be inserted into the mesh. An example in which the position is fixed so as not to move is also presented.

[0006]

SUMMARY OF THE INVENTION Japanese Patent Application Laid-Open No. Sho 64-5796
The prior art disclosed in Japanese Patent Publication No. 3 is extremely handy and can greatly enhance the wear resistance only by controlling the casting temperature and the thickness of the laminated super-hard metal material. Since it is only necessary to stack super-hard metal materials in layers on the surface, application is difficult unless the mold surface is formed substantially horizontally. Even more, when there are multiple wear surfaces other than horizontal surfaces, and when the wear surfaces are formed as curved surfaces instead of flat surfaces, it is technically quite difficult to enhance the wear resistance of all the wear surfaces with cast-in carbide metal The challenge remains.

[0007] The prior art disclosed in Japanese Patent Publication No. 7-4655 is
Although it is recognized that it is suitable for strengthening a complicated wear surface such as a curved surface, the strengthening layer is limited to only one layer having a particle diameter of about 2 to 3 mm. Isn't the effect thin? Also, it takes time to cure the adhesive for fixing the particles to the sand core, and the temperature is reduced to 16 at room temperature.
The fact that the time, even at 50 ° C., is within 8 hours is not necessarily a favorable condition from the viewpoint of work efficiency and mass production, and it requires cumbersome and skillful work of re-transferring particles by replacing tapes. We must hesitate to adopt manual work as a mass production system.

In Japanese Patent Publication No. 7-110406, there is a problem of fixing the position of the pin of the hard metal by the support member. The biggest technical problem when welding another member in a cast-in state is to focus on means for fixing the position of the cast-in material so that it does not move at the time of pouring, but in this conventional technique, the supporting member is Once melted with the pouring of the base metal, the pin position cannot be restrained so as not to move, and many pins lose their direction and are spilled by the molten metal and scattered into disjointed cracks, resulting in a composite wear-resistant surface There is absolutely no sense of formation. In addition, if the support member is formed of a thick iron plate that is strong enough to reliably restrain solidification, the inside of the wear-resistant member after solidification indicates a state in which a large foreign substance that bisects the member is included over the entire area. Therefore, it is not difficult to imagine that if it is applied to a place where an impact is applied, a crack will be made from the boundary surface and the member itself will be split into two, and the melting point of the iron plate (supporting member) will be about 1000 ° C. There are many questions about metallurgical evidence. In addition, when there are a plurality of wear surfaces or a curved surface, there is a concern that incorporating an appropriate cast-in along the surface may involve considerable difficulty in moving to a practical implementation.

Recently, wear-resistant materials attached to many devices such as pulverizers and crushers have been used instead of replacing them with new ones of the same shape when the parts facing wear have retreated and the efficiency limit has been reached. It is preferred to adopt a method in which the mounting direction of the previous member is reversed and the member is re-mounted, and a part that has not been worn is used as a new surface substantially as a new part.
Advantages such as a reduction in member costs, a reduction in replacement time, and a reduction in downtime of the apparatus are highly appreciated by the reversal reuse. For this purpose, the wear-resistant member is set to have a front-rear or left-right symmetrical shape, one member has two wear surfaces, and if one is worn, it is inverted and replaced with the other, and there are some mounting methods. However, in the case of a composite wear-resistant material having a cast-in material such as cemented carbide, the wear surface that can be applied is limited to one surface, as is apparent from the above-described prior art, and it is also a flat surface. Almost restricted. Although there is no prior art that rarely assumes a complicated curved surface, as described above, the work is complicated and requires the work of a skilled person,
It is also clear that the reaction takes a long time and the productivity is extremely low, so that the bottleneck is difficult, and there is a factor that hesitates to implement it except for special applications.

[0010] In a variety of industrial equipment, many wear-resistant materials that are dynamically driven are attached. However, since the wear surface is not limited to a single surface, it often straddles two or more corners. As in the prior art, there are many cases in which a remarkable effect cannot be expected with only a single and limited reinforcement. For example, FIG. 9 is an overall view (A) of a vertical roller mill and a partial view (B) showing the progress of wear of the rollers 104 and tires 105 as wear portions thereof. This is not the case, and the line gradually retreats from the line in the new state in FIG. In this way, the wear surface straddles the curved surface and the side surface, and uneven wear progresses unevenly in the left and right direction according to the mounting position, so strengthening by casting of cemented carbide metal is naturally arranged according to the progress of wear. If it doesn't make sense. In addition, if at least one of the wears progresses and the crushing efficiency is greatly reduced, at least the rollers 104 are usually reversed in the mounting position shown in FIG. Therefore, it is necessary to form reinforced wear-resistant surfaces on both side surfaces of the roller.

[0011] In order to solve the above-mentioned problems, the present invention disposes a cast-in of a hard metal without leakage on all of a plurality of surfaces of a wear-resistant member, including a case characterized by reversal reuse. Further, it is an object of the present invention to provide a composite wear-resistant material that is appropriately distributed regardless of the upward, downward, lateral, or oblique direction, regardless of whether the surface is flat or curved, and a method of manufacturing the same.

[0012]

SUMMARY OF THE INVENTION A cemented carbide wear-resistant material according to the present invention relates to an improvement in a composite wear-resistant material in which a wear-resistant member attached to a crusher or the like is reinforced by casting a cemented carbide metal on a wear surface. The wear-resistant main surface 1 and the wear-resistant side surface 2 facing the action
A composite wear-resistant material with enhanced hard metal cast wrapped in the throat all the wearing surface, the base metal constituting all wear surface is high
Hard metal made of high-Cr cast iron and constituting the columnar body 4
Is made of a WC-Co based sintered alloy, and the column 4 is
At a distance of at least 1/2 of the diameter D of the
Cr cast iron is above the lower limit that can prevent cracking due to impact
The basic feature of the configuration is that the base material surface 3 is integrally welded to the inside at the pitch . In addition, after the wear-resistant main surface 1 and the wear-resistant side surface 2 are worn, all the base material surfaces 3 such as the main surface and the side surface which correspond to the symmetrical portion in the front-rear and left-right directions of the member to be reused after reversing the mounting direction. Therefore, the fact that a large number of the columnar bodies 4 made of a hard metal are integrally welded at the above-mentioned pitch toward the inside respectively leads to the best solution of the problem.

Generally, a crusher, a crusher, a kneader, a granulator,
In equipment for processing raw materials called industrial machines such as
Subject to severe abrasive wear due to scratching, scratching, sliding, etc. with the raw materials to be processed (powder, granules, flakes, etc.). For example, the wear received by the liner attached to the inner surface of the device is limited to the surface only.However, when the wear-resistant member itself moves relative to the raw material, for example, the blades of the kneader or the rotating roller of the table roller are members. In addition to the direction of movement, the corners including the side surfaces are directly hit by the abrasion effect. Therefore, in many cases, the effect of extending the life is hardly exhibited when the abrasion resistance of only one surface is enhanced. In addition, as described above, since the mainstream is a system in which front and rear, left and right are designed symmetrically, and reversing mounting is used after progress of wear and reuse, the function of the present invention is indispensable to meet the needs. Requirements.

Based on this basic premise, the base metal constituting the base material surface 3 is a high-hardness, high-Cr cast iron,
Is formed of a WC-based sintered alloy, and the pitch at which the columns 4 are arranged is at least one of the diameters D of the columns.
The above problem was solved by preventing the occurrence of cracks in high Cr cast iron at a distance of / 2 or more. Matrix itself applies the proven high Cr cast iron wear resistance, hard metal is able to already apply confirmed WC-Co material results lead to good results. However, as is well known, high Cr cast iron has an extremely high hardness, but it is also a fact that it is brittle. Therefore, the key to successful implementation lies in how to prevent crack generation. After repeated trial and error tests, the pitch of the cemented carbide array was carefully set as described above, and the lower limit of the pitch was determined by nondestructive inspection (such as color check) of the prototype. If the wear-resistant members of industrial machines have a function that can withstand impacts, it is certain that the applicable range will be expanded at a stretch, and how to prevent cracking to improve versatility. Points are important crossroads.

[0015] 3. The following relates to a manufacturing method of the composite wear-resistant material, its manufacturing procedure than WC-Co-based sintered alloy
The columnar body is formed integrally with a cast-in portion 41 welded into the base material surface 3, a neck portion 42 having a diameter much smaller than the diameter D of the cast-in portion, and a locking portion 43 having a diameter larger than the neck portion. The model for the mold formed by the columnar body 4 is composed of an upper model 5, a lower model 6, and a core model 7 divided into upper and lower parts, and a model surface 51 of the upper and lower models forming the wear-resistant main surface 1 of the product, and / Or 61,
The holes 52 and / or 62, 72 into which the cast-in part 41 can be fitted into the model surface 71 of the core model forming the wear-resistant side surface 2 of the product are respectively formed in a direction perpendicular to the upper and lower mold separation surfaces.
At least a half of the diameter D of the cast portion 41 is perforated according to the pitch, and the hole 52 and / or 6
The casting sand 41 of the columnar body is inserted into 2, 72, and casting sand is charged onto the surface of the model including the neck portion 42 and the locking portion 43 protruding from the surface of the model, and is filled while being covered. The mold 5M, the lower mold 6M, and the core 7M are respectively formed, and after the mold release, the core 7M is fitted to the upper mold 5M and the baseboard 53M and / or 63M of the lower mold 6M, respectively. The molten metal of the base metal made of high Cr cast iron is poured, and the neck portion 42 and the locking portion 43 of the columnar body protruding from the product surface are broken into the base material when the frame is opened after solidification or shot blasting. The problem was solved by adopting a process of removing and leaving only the cast-in part 41 welded to the metal.

The most significant feature of the present invention is that the wear resistance is not limited to a flat surface, a curved surface, an upper surface, a lower surface, a side surface, and an inclined surface. The point is that a wear surface can be formed. It goes without saying that the technical conditions under which such a member can be manufactured are in the molding method. The main point to be emphasized in the procedure is that the main model and the target surface of the core are the upper model,
Perforation is performed in a direction perpendicular to the division plane (parting plane) of the lower model, and molding is performed so as to embed a columnar body prepared in advance. After molding, the columnar body perpendicular to the division surface is separated from the model when the model held first is released from the model, stays in the mold, and is exposed in the molding sand into which the exposed neck portion 42 and the locking portion 43 are put. The mold is hardened and fixed, and only the cast-in portion 41 projects into the hollow portion (pouring portion) of the mold. As long as the direction of the columnar body is perpendicular to the dividing plane, the model can easily be released without obstructing the mold even if the model surface is a curved surface or an inclined surface. The side surfaces and the like that intersect at right angles are molded as a baseboard, and then fitted with a core planted with a columnar body to form a cast-in state similar to that of the main mold. That is, the columnar body is supported by the locking portion embedded in the mold, and only the cast-in portion is exposed in the hollow portion of the mold, so that if the hollow portion is filled with the molten metal, the cast-in portion is wrapped. It can be completely welded.

Among the above-mentioned production methods, the molding sand for molding the upper mold, the lower mold, and the core can be a better solution by applying alkali phenol self-hardening sand having good flowability and high productivity. Of course, it does not hinder the application of various conventional molding methods such as other self-hardening molding sand, CO2 sand, and the like.

Further, the cemented carbide is formed into a columnar body by a well-known sintered alloy using WC-based carbide as a combination of Co, and the base metal is made of high-Cr cast iron, and a hole formed in the model surface. Are arranged at intervals of at least 1/2 of the hole diameter.
r To prevent cracks due to the brittleness inherent in cast iron, 1450
Pouring in the range of ~ 1480 ° C has high hardness,
High Cr, which is difficult to cast including casting
It can be said that this is a necessary condition for applying the cast iron material.

Further, the cast-in portion 41 of the columnar body 4 has a cylindrical shape.
Alternatively, the neck portion 42 is formed of a cylindrical body having a diameter and a length of not more than 1/3 of the diameter D of the cast-in portion or the cross-over dimension, and the locking portion 43 is formed of If it is formed of a disk having a diameter of 1/2 or less of the diameter D,
While holding the columnar body in the mold and withstanding the flow of pouring, it keeps the immovable position, and the neck breaks naturally during casting, unraveling after solidification, or during the maintenance stage such as shot blasting It is a condition for obtaining a smooth casting surface with almost no special care, which is a major point that plays a part in solving problems by increasing production productivity, eliminating labor, reducing costs. .

[0020]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS For convenience of explanation, the manufacturing method of the present invention will be described first. 1 to 3 are conceptual views of longitudinal front views for each manufacturing procedure. FIG. 1A shows an upper model 5 on a surface plate P,
Alternatively, the lower model 6 is placed and the metal frame F surrounding the periphery is set on the surface plate. For example, a hole 52 having a diameter larger than the diameter D of the cast-in portion by 0.5 mm so that the cast-in portion 41 of the columnar body 4 can be fitted into the model surface 51 (61) corresponding to the wear surface of the product.
(62) is bored, and the cast-in portion 41 of the columnar body 4 prepared in advance is fitted, and only the neck portion 42 and the locking portion 43 protrude from the model surface. FIG. 4A is a perspective view illustrating an embodiment of a columnar body.
(B), the diameter and length of the neck portion 42 are approximately 1/3 and the diameter of the locking portion 43 are approximately 1/2 of the diameter of the cast-in portion 41, In principle, the pitches are arranged with an interval of at least 1/2 of the diameter of the cast-in portion. Note that, instead of the columnar body in FIG. 4, a polygonal prism such as a triangular prism, a quadrangular prism, or a hexagonal prism may be used.

The upper and lower models adopt a method in which a baseboard is provided in addition to the model surface on which the product shape is transferred as it is, and a mold is provided, and a cast-in portion on the side surface orthogonal to the division surface is transferred to the core surface. . As the molding sand S used for molding, in the embodiment of the present invention, an alkali phenol process, which is a kind of self-hardening mold, is employed. Because the mold strength after curing is high, the effect of holding and restraining the neck and locking part of the embedded columnar body is strong, and the reliability of mold strength is established, and the fluidity during molding is good. The main reason for application is that it is easy to fill the sand on the model surface on which the columnar bodies are arranged, so that the unevenness of the mold hardness after hardening is small, and that it is also reliable in that respect. Chromite sand is used as the skin sand, and 0.8% to 0.9% of the product name S-603 of Kao Quaker Co., Ltd.
As a curing agent, the company's product name Q * 120-150
By mixing 0%, an upper mold 5M and a lower mold 6M were formed.

After the molding, the molding sand S is left for a predetermined time to harden, and then the model and the mold are separated as shown in FIG. 1 (B).
In the embodiment shown in FIG.
The upper (lower) mold 5M (6M) is lifted together with the casting frame F, leaving the upper mold (lower mold) model 5 (6) fixed to the base, and is released.

On the other hand, in order to reinforce the side surface orthogonal to the dividing plane (parting plane) of the model, a core system is used in combination with FIG.
In the core model 7 as shown in FIG.
In the same manner as the main mold, a hole 72 is pierced into a model surface 71 forming a column, a cast-in portion 41 of a columnar body is fitted, and a core 7M including a neck portion 42 and a locking portion 43 protruding above the model surface is removed. Form. The molding sand for core molding may be an alkali phenol process, or any other molding method can be freely selected. After the molding sand is hardened, the core 7M is released from the core model 7 as shown in FIG.

FIG. 3 (A) shows a core 7M fitted to the baseboard 53M (63M) of each of the upper mold 5M and the lower mold 6M.
The two molds are combined to make a completed mold.
In this drawing, illustrations of parts which are naturally necessary for casting methods such as a gate, a runner, a weir, a riser and the like are omitted. After pouring, a normal casting process such as solidification, unraveling, shot blasting, etc. is passed to obtain a product as shown in FIG. 3 (B). There is no special difference between the casting and care processes from other castings, but the notable feature is the condition of care for the columnar body after solidification, and a smooth casting surface without spending almost any manpower. Obtaining the face as it is offers significant advantages.

In the case of upper and lower molds, all of the faces facing wear are used as main molds or in the case where it is difficult to release the molds, a baseboard and a core are used together to realize a columnar arrangement of a required pitch. I do. 5 (A) and 5 (B) are a plan view and a longitudinal side view of a wear-resistant plate to be attached to a wear portion of a special crusher prototyped according to the present invention. The wear-resistant main surface 1 and the wear-resistant side surface 2 are formed at a pitch of 5 mm. The corner where the wear directly hits consists of a wear-resistant main surface and a wear-resistant side surface that are bent at right angles, and both surfaces are reinforced equally with cemented carbide metal. If it is applied, it can be commercialized.

When focusing on the columnar body 4 and following the change in each process, the columnar body 4 is aggregated as shown in each of FIGS. In the figure (A), the model surface 51 (61, 71) of the upper die, the lower die, or the core
At the time when the cast-in part 41 is fitted into the hole part 52 drilled in FIG. 1, at the time when the neck part 42 and the locking part 43 projecting on the model surface are covered with the molding sand S in FIG. When the core is released from the mold and the core 7M is fitted to the baseboard of the upper mold 5M (lower mold 6M), in FIG. The state at the time of automatically folding and separating from the product is shown.

FIG. 7 shows another embodiment of the present invention, in which the worn surface of the vertical roll mill of FIG. 9 cited as an example of the prior art is strengthened, and FIG. The roller and the tire in FIG. 2B are in a state where they are reinforced by compounding. At this time, the columnar body 4A,
4B are base material surfaces 3A, 3B as illustrated in FIG.
The upper end surfaces of the cast-in portions 41A and 41B are formed as inclined surfaces or curved surfaces so as to substantially match the base material surface 3 of the wear surface.
A surface corresponding to A and 3B is formed.

[0028]

As described above, the present invention relates to the shape of a composite wear-resistant material and its manufacturing method. Moreover, the effect of simultaneously giving the strongest wear resistance to any of the wear surfaces required at a plurality of locations in one member can be obtained. Therefore, it is easy to achieve multi-faceted compounding of the wear required for most wear-resistant materials of industrial equipment, especially where dynamic elements are indispensable, and to maintain a highly effective function that is incomparable with conventional ones. Can be guaranteed.

Even for the reversal of wear-resistant materials, which has become a common sense in recent industrial machines, it is possible to remarkably reinforce the left and right and front and rear symmetric wear surfaces by casting the columnar members from the beginning. A member whose life has doubled due to reuse leads to a synergistic effect of extending the useful life several times by further compounding, and the merit to be enjoyed by the place of use is immense.

The disclosure of a specific embodiment and a manufacturing method after claim 3 directly addresses the problem that the provision of such a wear-resistant member is ideal, but the specific means of its manufacture is unknown. The answer. The improvement of wear resistance itself by casting of cemented carbide is a well-known technique, and despite many trials and errors, the decisive means does not appear. This is due to the presence of casting defects that are likely to occur in some cases. In particular, in order to guarantee the wear resistance of the base metal itself and achieve the best overall wear resistance together with the hard metal, the high hardness of the base metal itself is an essential condition, and at the same time, its brittleness There is also a danger of developing major problems such as cracks, ruptures, dropouts, major failures of the entire device, and suspension of work. No matter how good the abrasion resistance is, a member that breaks to stop the device and interrupt the work cannot be adopted with complete security. In the present invention, efforts have been made to confirm manufacturing conditions in detail, and various limitations in manufacturing that are safe and hard to cause defects have been reached. The relative relationship between the dimensions of each columnar body, the specific conditions of the pitch for arranging the cast-in parts, the casting temperature, etc., are all specific limitations to ensure safety during use and long service life, This is a meticulous limitation that can never be found in the prior art. It goes without saying that this enhances the evaluation of the wear-resistant member according to the present invention, the economic effect of expanding the applicable range, and the psychological effect of enhancing the trust of labor and management.

[Brief description of the drawings]

1 (A) and 1 (B) show a procedure for molding and releasing a top mold (lower mold) of the present invention.

2 (A) and 2 (B) show a procedure for molding and releasing a core of the present invention.

FIG. 3 shows an assembly of a mold and a core (A), and a cross section of the product after casting and care (B).

FIG. 4 is a perspective view of a columnar body according to an embodiment of the present invention (A).
FIG. 7B is a front view (B) showing dimensions of the columnar body, and a front view (C) of a columnar body of another embodiment.

FIG. 5 is a plan view (A) and a longitudinal sectional side view (B) of a product according to an embodiment of the present invention.

FIGS. 6A to 6D are partial front views showing the behavior of the columnar body in each step.

FIG. 7 is a partial vertical sectional front view of roller reinforcement (A) and tire reinforcement (B) showing another embodiment of the present invention.

FIG. 8 is a perspective view of a conventional manufacturing method.

9A and 9B are an overall view (A) and a vertical sectional front view (B) of a partial view illustrating another conventional technique.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Wear main surface 2 Wear side 3 Base material surface 4 Column model 5 Upper model 6 Lower model 7 Core model 5M Upper mold 6M Lower mold 7M Core 41 Cast-in part 42 Neck part 43 Locking part 51 Model surface 52 hole 53 baseboard 61 model surface 62 hole 63 baseboard 71 model surface 72 hole F metal frame P surface plate S molding sand

Continuation of front page (56) References JP-A-61-82959 (JP, A) JP-A-60-82263 (JP, A) JP-A-51-144334 (JP, A) JP-A-2-187250 (JP) JP-A-7-305583 (JP, A) JP-A-7-303956 (JP, A) JP-A-6-218520 (JP, A) JP-A-1-118361 (JP, A) (58) Field surveyed (Int. Cl. ⁷ , DB name) B22D 19/02 B02C 17/22 B22D 19/00 B22D 19/06

Claims (6)

(57) [Claims] 1. A wear- resistant main surface 1 and a wear-resistant surface facing wear action of a wear-resistant member attached to a crusher, a crusher, a kneader, or the like.
In a composite wear-resistant material in which all wear surfaces such as wear side 2 are cast and reinforced with a hard metal, the mother material that constitutes all wear surfaces
The material metal is a high-hardness, high-Cr cast iron, which constitutes the columnar body 4.
Is made of WC-Co based sintered alloy
4 at a distance of at least 1/2 of the diameter D of the columnar body.
The high Cr cast iron can prevent cracking due to impact
A cemented carbide wear-resistant material in which all wear surfaces are reinforced integrally with the base material surface 3 at a pitch not lower than the lower limit . 2. The main surface according to claim 1, wherein after the wear-resistant main surface 1 and the wear-resistant side surface 2 are worn, the mounting direction is reversed and the front-rear / left-right symmetric portion of the member to be reused is applied. A cemented carbide composite in which a large number of columnar bodies 4 made of a cemented metal are integrally welded at the above-mentioned pitch from all the base material surfaces 3 such as side surfaces to the inside, respectively. Wear resistant material. 3. A method for manufacturing a composite wear-resistant material in which a cemented carbide metal is fixed and poured into a mold for casting a base metal in advance to form a locally reinforced wear-resistant surface , The columnar body 4 made of a sintered alloy
A cast-in portion 41 to be welded into the inside, a neck portion 42 having a diameter much smaller than the diameter D of the cast-in portion, and a locking portion 43 having a larger diameter than the neck portion
The mold model is composed of an upper model 5, a lower model 6 and a core model 7 divided into upper and lower parts, and a model surface 51 of the upper and lower models forming the wear-resistant main surface 1 of the product. And / or 61, and holes 52 and / or 62, in which the cast-in portion 41 can be fitted to the model surface 71 of the core model forming the wear-resistant side surface 2 of the product.
Less vertically 72 against upper and lower parting surface
Both holes are pierced through a pitch separated by １ ／ or more of the diameter D of the casting portion 41 , and the columnar body 4 is formed into the hole portion 52 and / or 62, 72.
The casting mold 41 is inserted and the molding sand including the neck part 42 and the locking part 43 protruding from the model surface is charged and covered with the casting sand on the model surface, and the upper mold 5M and the lower mold 6M are filled. , And the core 7M, and after release, the core 7M is fitted to the baseboard 53M and / or 63M of the upper mold 5M and the lower mold 6M, and the upper and lower molds are made of high Cr cast iron. A molten metal of a material is poured, and a neck portion 42 and a locking portion 43 of a columnar body protruding from the product surface during the unraveling or shot blasting after solidification are broken and integrally cast into the base material. A method for producing a cemented carbide wear-resistant material in which all wear surfaces are reinforced, comprising a procedure of separating leaving only 41. 4. The method for producing a cemented carbide wear-resistant material according to claim 3, wherein the molding sand for molding the upper mold, the lower mold, and the core is an alkali phenol self-hardening sand. . 5. The method according to claim 3, wherein the cemented carbide metal is formed into a columnar body using a WC-based sintered alloy, and the base metal is a high Cr metal.
It is made of cast iron and has a model surface 51 and / or 61,
The pitch of the holes drilled at 71 is arranged at a distance of 1/2 or more of the hole diameter, and pouring is performed in the range of 1450 to 1480 ° C. in order to prevent cracks due to brittleness peculiar to high Cr cast iron. A method of manufacturing a cemented carbide wear-resistant material with an enhanced wear surface. 6. The cast-in portion according to claim 3, wherein the cast-in portion 41 of the columnar body 4 has a columnar shape or a prismatic shape such as a 3, 4, or 6-sided shape, and the neck portion 42 has a diameter of the cast-in portion. D or a cylindrical body having a diameter and a length of 1/3 or less of the span dimension, and the locking portion 43 is formed of a disk having a diameter of 1/2 or less of the diameter D. A method of manufacturing a cemented carbide wear-resistant material with a reinforced wear surface.