Graphite boat

Abstract

The utility model discloses a graphite boat, and specifically relates to the technical field of graphite boats, the graphite boat comprises a graphite boat body made of graphite, the bottom of the graphite boat body is fixedly provided with a convex block, the convex block and the graphite boat body are integrally formed, the outer side of the convex block and the periphery of the bottom of the graphite boat body form a bottom groove, and when the graphite boat body is stacked, the convex block is fixed on the bottom groove. The protruding block of the top graphite boat body and the bottom groove of the bottom graphite boat body are buckled together, a plurality of openings are formed in the periphery of the graphite boat body, the temperature in the graphite boat body can be even conveniently, the graphite boat body can be taken and placed conveniently, a plurality of powder grooves are formed in the bottom end in the graphite boat body, and a protrusion is formed between every two adjacent powder grooves. The top end face of each protrusion is arranged to be an arc face, and powder on the tops of the protrusions can conveniently flow into the powder grooves. The graphite boat disclosed by the utility model is convenient to stack and place in the furnace, so that the powder can completely flow into the groove after being scattered, and the temperature nonuniformity in the furnace can be reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of graphite boats, in particular to a graphite boat. Background Art

[0002] Powder metallurgy is a process technology that produces metal powder or uses metal powder (or a mixture of metal powder and non-metallic powder) as raw material, and then forms and sinters it to manufacture metal materials, composite materials and various types of products. Powder metallurgy Ni-WC welding rods are made of Ni-WC powder by sintering. Powder metallurgy Ni-WC welding rods are used on cone drills. After surfacing, they have good bonding ability with the base material and provide good wear resistance. Graphite boats are needed to form welding rods by powder metallurgy sintering. Graphite boats are used as containers for supporting and carrying powder materials. They can withstand high temperatures, allowing powder materials to be sintered in high temperature environments.

[0003] At present, conventional graphite boats have the following problems due to structural problems: 1. It is not convenient to stack and place them in the furnace; 2. There is a lack of ventilation holes, and the temperature inside the graphite boat is highly uneven after stacking; 3. When the powder is spread unevenly, it is difficult to make the powder flow completely into the groove through slight vibration. Utility Model Content

[0004] The utility model aims to provide a graphite boat, which can facilitate the stacking and placement of the graphite boat in a furnace, facilitate the powder to flow completely into the groove after powdering, and reduce the temperature non-uniformity in the furnace.

[0005] In order to achieve the above-mentioned purpose, the utility model provides the following technical solutions: a graphite boat, comprising a graphite boat body made of graphite, a protrusion is fixedly provided at the bottom of the graphite boat body, and the protrusion and the graphite boat body are integrally formed, and the outer side of the protrusion and the bottom of the graphite boat body form a bottom groove around, which is convenient for stacking the graphite boat in the furnace.

[0006] The graphite boat is provided with a plurality of openings around its periphery, so as to make the temperature in the graphite boat uniform and facilitate taking and placing the graphite boat.

[0007] A plurality of powder grooves are provided at the bottom of the graphite boat, with a protrusion formed between two adjacent powder grooves. The top surface of each protrusion is set as an arc surface, so that the powder on the top of the protrusion can flow into the powder groove under the action of gravity, which greatly improves the powder loading efficiency during production. After the powder is slightly shaken, the powder is spread flat in the powder groove without leakage.

[0008] Preferably, when two graphite boats are stacked, the protrusion of the top graphite boat is buckled with the bottom groove of the bottom graphite boat.

[0009] Preferably, there are 17-21 powder grooves.

[0010] Preferably, the four inner walls of the graphite boat are processed into inclined surfaces facing the powder groove, and the inner walls of the powder groove are processed into inclined surfaces facing the bottom end of the powder groove. After the powder is poured into the graphite boat, the powder can flow into the powder groove under the action of gravity, thereby improving the powder loading efficiency.

[0011] Preferably, the surface of the graphite boat is coated with a boron nitride coating, and the graphite boat is made of high-purity graphite. The advantages of the boron nitride coating are: 1. High hardness: The boron nitride coating has an extremely high hardness, which can reach 2000 to 4000HV, which is higher than the hardness of most metal materials. 2. Excellent wear resistance: The boron nitride coating has an extremely low friction coefficient and good wear resistance, which can effectively reduce the wear of parts and extend the service life. 3. High temperature resistance: The boron nitride coating can maintain good performance stability in high temperature environment, is not easy to deform and fall off, and is suitable for high temperature conditions.

[0012] By selecting the graphite boat material and coating, the welding rod can be prevented from sticking to the graphite boat after sintering.

[0013] In the above technical solution, the technical effects and advantages provided by the utility model are:

[0014] 1. The graphite boat of the utility model adopts the design of protrusions and bottom grooves, which makes it easy to buckle together when multiple graphite boats are stacked, so as to facilitate furnace loading;

[0015] 2. The interior of the graphite boat of the utility model adopts an inclined surface and an arc surface design. After the powder is poured into the graphite boat, the powder is more likely to flow into the powder groove due to gravity, which greatly improves the powder loading efficiency during production. It only takes 2-3 minutes to load the powder in each boat, and after the powder is slightly shaken, the powder is spread flat in the powder groove without leakage.

[0016] 3. The utility model adopts an opening design around the graphite boat, which is convenient for the uniform temperature inside the graphite boat and improves the quality of welding rods. At the same time, the openings around the graphite boat are also convenient for taking and placing the graphite boat after stacking;

[0017] 4. The utility model optimizes the life of the graphite boat by selecting the graphite boat material and the boron nitride coating, and can prevent the welding rod from sticking to the graphite boat after sintering, so as to facilitate the removal of the welding rod. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present utility model. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0019] Figure 1 It is the overall structure diagram of the utility model;

[0020] Figure 2 This is the overall bottom structure diagram of the utility model;

[0021] Figure 3 It is a side view of the utility model;

[0022] Figure 4 It is a side sectional view of the utility model;

[0023] Figure 5 It is a front sectional view of the utility model.

[0024] Description of reference numerals:

[0025] 1 graphite boat body, 2 convex block, 3 bottom groove, 4 opening, 5 powder groove, 6 convexity. DETAILED DESCRIPTION

[0026] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0027] The utility model provides Figure 1-5 A graphite boat shown includes a graphite boat body 1, which is made of high-purity graphite and coated with boron nitride coating on the surface of the graphite boat body 1, which optimizes the life of the graphite boat and facilitates the removal of welding rods, solving the current problem that the welding rods will stick to the graphite boat after sintering due to both material and coating reasons.

[0028] like Figure 2-5 As shown, a protrusion 2 is fixedly provided at the bottom of the graphite boat 1, and the protrusion 2 is integrally formed with the graphite boat 1, and a bottom groove 3 is formed around the outer side of the protrusion 2 and the bottom of the graphite boat 1. When two graphite boats 1 are stacked, the protrusion 2 of the top graphite boat 1 and the bottom groove 3 of the bottom graphite boat 1 are buckled together, which is convenient for stacking the graphite boats and thus convenient for loading into the furnace.

[0029] Then, if Figure 1-5 As shown, a plurality of openings 4 are provided around the graphite boat 1 to facilitate uniform temperature inside the graphite boat 1 and to facilitate taking down the stacked graphite boats by hand;

[0030] In order to improve the powder filling efficiency, Figure 4-5As shown, the four inner walls of the graphite boat 1 are processed into inclined surfaces facing the powder groove 5, and the inner walls of the powder groove 5 are processed into inclined surfaces facing the inner bottom end of the powder groove 5, and a plurality of powder grooves 5 are opened at the inner bottom end of the graphite boat 1, and the powder grooves 5 are provided with 17-21, and a protrusion 6 is formed between two adjacent powder grooves 5, and the top surface of each protrusion 6 is set as an arc surface. When Ni-WC powder is poured into the graphite boat 1, the powder will flow into the powder groove 5 along the inclined surface and the arc surface of the protrusion 6.

[0031] The steps of preparing the welding rod of the utility model are as follows: uniformly mixed Ni-WC powder is sprinkled in the graphite boat 1, the temperature is raised to 1075°C, and then the temperature is kept for 10 minutes, and then the welding rod is prepared by cooling with the furnace. The welding rod has a good appearance and is easy to be taken out from the graphite boat, and has good performance in the subsequent welding fluidity test.

[0032] The above only describes some exemplary embodiments of the present invention by way of illustration. It is undoubted that those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A graphite boat, comprising a graphite boat body (1) made of graphite, characterized in that: A protrusion (2) is fixedly provided at the bottom of the graphite boat (1), and the protrusion (2) and the graphite boat (1) are integrally formed, and a bottom groove (3) is formed around the outer side of the protrusion (2) and the bottom of the graphite boat (1); The graphite boat (1) is provided with a plurality of openings (4) around its periphery, so as to facilitate uniform temperature inside the graphite boat (1) and facilitate taking out and placing the graphite boat (1); A plurality of powder grooves (5) are provided at the bottom of the graphite boat (1), a protrusion (6) is formed between two adjacent powder grooves (5), and the top surface of each protrusion (6) is configured as an arc surface to facilitate the powder on the top of the protrusion (6) to flow into the powder groove (5).

2. A graphite boat according to claim 1, characterized in that: When the graphite boats (1) are stacked, the protrusions (2) of the top graphite boat (1) and the bottom grooves (3) of the bottom graphite boat (1) are buckled together.

3. A graphite boat according to claim 1, characterized in that: The number of the powder grooves (5) is 17 to 21.

4. The graphite boat according to claim 1, characterized in that: The four inner walls of the graphite boat (1) are all processed into inclined surfaces facing the powder groove (5), and the inner walls of the powder groove (5) are all processed into inclined surfaces facing the inner bottom end of the powder groove (5).

5. The graphite boat according to claim 1, characterized in that: The surface of the graphite boat (1) is coated with boron nitride coating.

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