CN112628726B

CN112628726B - Metal material for CFB boiler wear-resistant plate, profiling wear-resistant plate, lateral wear-resistant plate and manufacturing method of wear-resistant plate

Info

Publication number: CN112628726B
Application number: CN202110083201.2A
Authority: CN
Inventors: 牟志荣; 李丙阳
Original assignee: Zhengzhou Sanzhong Energy Technology Co ltd
Current assignee: Zhengzhou Sanzhong Energy Technology Co ltd
Priority date: 2021-01-21
Filing date: 2021-01-21
Publication date: 2024-03-12
Anticipated expiration: 2041-01-21
Also published as: CN112628726A

Abstract

The invention discloses a metal material for a CFB boiler wear-resistant plate, a profiling wear-resistant plate, a lateral wear-resistant plate and a manufacturing method of the wear-resistant plate, wherein the metal material for the CFB boiler wear-resistant plate comprises the following components: the material for the CFB boiler wear-resistant plate is prepared from 0.08-0.18 wt% of carbon, 0-1.5 wt% of silicon, 1-1.2 wt% of manganese, 22-24 wt% of chromium, 7-10 wt% of nickel, 1.1-1.5 wt% of molybdenum, 0.24-0.32 wt% of nitrogen and the balance of iron and unavoidable impurities, and has the advantages of convenience in construction welding and long service life and low maintenance cost by reasonably collocating various elements.

Description

Metal material for CFB boiler wear-resistant plate, profiling wear-resistant plate, lateral wear-resistant plate and manufacturing method of wear-resistant plate

Technical Field

The invention relates to the technical field of boiler wear plates, in particular to a metal material for a CFB boiler wear plate, a profiling wear plate, a lateral wear plate and a manufacturing method of the wear plate.

Background

The CFB boiler is a fully-called circulating fluidized bed boiler, adopts clean coal combustion technology with highest industrialization degree, mainly comprises two parts of a combustion chamber and a circulating furnace, adopts fluidized combustion, becomes an advanced technology for utilizing energy of a flame-retardant solid fuel, and better solves the problems of coal combustion with high sulfur content, large ash content, multiple impurities, low heat value and the like and exhaust pollution.

The water cooling wall is the main heated part of the circulating fluidized bed boiler, and consists of a plurality of rows of steel pipes distributed around the boiler hearth, the inside of the water cooling wall is flowing water or steam, the outside receives the heat of the flame of the boiler hearth, mainly absorbs the radiant heat of high-temperature combustion products in the hearth, and the medium rises in the water cooling wall and is heated and evaporated.

In the combustion process, the wall-attached ash flow which descends along the wall surface of the hearth directly scours and abrades the water-cooled wall, the time is long, the pipeline forming the water-cooled wall is gradually thinned and leaked, the wall-attached ash flow is ash generated by combustion, and the larger the flow speed of the wall-attached ash flow is, the larger the concentration of ash particles is, the larger the hardness of the ash particles is, and the more serious the abrasion of the water-cooled wall is.

In order to prevent the water-cooled wall from being excessively worn, anti-wear measures are needed, at present, the water-cooled wall of the circulating fluidized bed boiler is mainly coated at high temperature, anti-wear beams are additionally arranged, and the existing relatively hot high-chromium high-nickel alloy plate anti-wear technology is adopted, so that the measures have good effects on solving the problem of the water-cooled wall of the circulating fluidized bed boiler. The anti-wear beam is mainly suitable for large boilers, is high in installation cost, and in addition, solid materials flowing downwards along the wall surface in a hearth generate a rebound force due to the change of the flowing direction when colliding with steps of the anti-wear beam, so that the abrasion of the wall of the area is increased, the water cooling wall of the circulating fluidized bed boiler is severely abraded at the root position of the anti-wear beam, and therefore, the anti-wear Liang Zaihang has a double-blade sword in the industry. The high-temperature spraying wear-proof mode has high cost and is generally used by combining a wear-proof beam and a wear-proof plate. Compared with an anti-wear beam and high-temperature spraying anti-wear mode, the anti-wear plate has relatively low cost and is particularly widely applied to the field of medium-sized and small-sized circulating fluidized bed boilers.

In use, the wear-resistant plate is welded on the water-cooled wall, so that the wear-resistant plate mainly plays a role in turbulence and wear resistance, and is in a complex and corrosive smoke environment, so that the wear-resistant plate has higher requirements on welding performance, wear resistance and corrosion resistance.

Currently, the industry is always searching for an anti-wear plate with more excellent performance, for example, in the prior art, the Chinese patent document with publication number of CN106282840A describes an XFR material for a guide plate of a CFB boiler, the Chinese patent document with publication number of CN111363986A describes a guide plate for anti-wear of a water-cooled wall of the CFB boiler and a production method thereof, the Chinese patent document with publication number of CN 106931430A describes a profiling anti-wear plate for the water-cooled wall of the CFB boiler, and the Chinese patent with publication number of CN206724148U describes a lateral anti-wear plate, which belongs to the technology for manufacturing the anti-wear plate, but in general, the production and development work of the anti-wear plate are always in an improved state, and the anti-wear plate still has room for improvement and performance improvement.

Disclosure of Invention

The invention aims to provide a metal material for a CFB boiler wear plate, a profiling wear plate, a lateral wear plate and a manufacturing method of the wear plate, and solves the technical problem that the performance of the boiler wear plate is not excellent enough in the prior art.

To solve the above technical problem, a first aspect of the present invention is:

the metal material for the CFB boiler wear plate is designed, and the components of the metal material for the CFB boiler wear plate are as follows: 0.08 to 0.18 weight percent of carbon, 0 to 1.5 weight percent of silicon, 1 to 1.2 weight percent of manganese, 22 to 24 weight percent of chromium, 7 to 10 weight percent of nickel, 1.1 to 1.5 weight percent of molybdenum, 0.24 to 0.32 weight percent of nitrogen, and the balance of iron and unavoidable impurities.

Preferably, the metal material for the wear plate of the CFB boiler comprises the following components: 0.18wt% carbon, 1.5wt% silicon, 1.2wt% manganese, 24wt% chromium, 10wt% nickel, 1.5wt% molybdenum, 0.32wt% nitrogen, the balance being iron and unavoidable impurities.

Preferably, the metal material for the wear plate of the CFB boiler comprises the following components: 0.11wt% carbon, 1.12wt% manganese, 22.94wt% chromium, 7.6wt% nickel, 1.316wt% molybdenum, 0.256wt% nitrogen, the balance being iron and unavoidable impurities.

Preferably, the metal material for the wear plate of the CFB boiler comprises the following components: 0.13wt% carbon, 0.75wt% silicon, 1.1wt% manganese, 23wt% chromium, 8.5wt% nickel, 1.3wt% molybdenum, 0.28wt% nitrogen, the balance being iron and unavoidable impurities.

The second aspect of the invention is:

the profiling wear-resistant plate comprises a plate body, wherein an inner arc edge matched with a pipeline of a boiler water-cooled wall is arranged on the inner side of the plate body, welding protrusions are arranged between the adjacent inner arc edges, an outer arc edge corresponding to the inner arc edge is arranged on the outer side of the plate body, the adjacent outer arc edges are in transition through smooth curved edges, and the plate body is made of metal materials for the CFB boiler wear-resistant plate according to the first aspect of the invention.

A third aspect of the invention is:

the lateral anti-wear plate comprises a rectangular plate body, wherein one side of the plate body is provided with a welding block, and the plate body and the welding block are made of metal materials for the CFB boiler anti-wear plate according to the first aspect of the invention.

A fourth aspect of the invention is:

the manufacturing method of the wear plate comprises the following steps:

(1) Making a wax film according to the shape of the wear-resistant plate to be made, and then grouping the wax film into trees;

(2) Preparing a shell;

(3) Pouring: taking an alloy containing metal material components for the CFB boiler wear plate according to the first aspect of the invention, and pouring the alloy after smelting in a smelting furnace;

(4) Removing more than 90% of the outer shell of the casting molding member by vibrating the shell, performing shot blasting on the casting member to remove the residual shell, and cutting and separating the wear-resisting plates connected together;

(5) Finishing: and (3) grinding the surfaces of the cut and separated wear-resistant plates, and finally welding and polishing defects on the surfaces of the wear-resistant plates.

The invention has the main beneficial technical effects that: the material for the CFB boiler wear-resistant plate provided by the invention has the advantages that through reasonable collocation of various elements, the performance index of the manufactured wear-resistant plate is more excellent, the material is more suitable for being used on a water-cooled wall of a CFB boiler furnace, and the material has better tensile strength, wear resistance, welding performance and high temperature resistance, so that the construction and welding are convenient, the service life is long, and the maintenance cost is reduced. Specifically, the material for the CFB boiler wear-resistant plate is added with Mo element and N element in proportion, so that the casting material is similar to the type of duplex stainless steel, the casting similar to the duplex stainless steel has better welding performance, and the corrosion resistance and wear resistance under high-temperature working conditions are improved.

Drawings

FIG. 1 is a front view of one embodiment of a contoured wear plate of the present invention.

Fig. 2 is a physical photograph of one embodiment of a contoured wear plate of the present invention.

FIG. 3 is a photograph of one embodiment of a contoured wear plate of the present invention in use welded to a CFB boiler water wall.

FIG. 4 is a front view of one embodiment of a lateral wear plate of the present invention.

FIG. 5 is a right side view of one embodiment of a lateral wear plate of the present invention.

FIG. 6 is a photograph of a contoured wear plate and a lateral wear plate when used in welded relation to a CFB boiler water wall.

Fig. 7 is a photograph of a wax film and corresponding mold made in an embodiment of a method of making wear plates in accordance with the present invention.

Fig. 8 is a photograph of a plurality of the wax film group trees shown in fig. 7.

Fig. 9 is a photograph of the group tree structure of fig. 8 after slurry coating.

Fig. 10 is a photograph of a dewaxed sand shell of the tree structure of fig. 9 after slurry and sand dipping.

Fig. 11 is a photograph of the sand shell of fig. 10 as it is baked.

Fig. 12 is a photograph of a CFB boiler wear plate obtained by refining when the metal material is poured into a sand shell.

Fig. 13 is a photograph of the cast member after the shell is removed from the vibrating shell.

Fig. 14 is a photograph of the cast member of fig. 13 cut.

Fig. 15 is a photograph of the contoured wear plate obtained after cutting of fig. 14 as it is polished.

In the above figures, the reference numerals are shown as follows: plate body 1, inner arc 11, welding projection 12, outer arc 13, smooth curved edge 14, plate body 2, welding block 21, profiling wear plate 10, pipe 20, fin 30, lateral wear plate 40, wax film 50, mold 51, weld point 52, runner mold 53, bracket 54.

Detailed Description

The following examples are given to illustrate the invention in detail, but are not intended to limit the scope of the invention in any way.

Example 1:

the metal material for the CFB boiler wear plate comprises the following components: 0.18wt% carbon, 1.5wt% silicon, 1.2wt% manganese, 24wt% chromium, 10wt% nickel, 1.5wt% molybdenum, 0.32wt% nitrogen, the balance being iron and unavoidable impurities. The metal material for the CFB boiler wear plate is formed by casting an alloy containing the above components after melting in a furnace.

Example 2:

the metal material for the CFB boiler wear plate comprises the following components: 0.11wt% carbon, 1.12wt% manganese, 22.94wt% chromium, 7.6wt% nickel, 1.316wt% molybdenum, 0.256wt% nitrogen, the balance being iron and unavoidable impurities. The metal material for the CFB boiler wear plate is formed by casting an alloy containing the above components after melting in a furnace.

Example 3:

the metal material for the CFB boiler wear plate comprises the following components: 0.13wt% carbon, 0.75wt% silicon, 1.1wt% manganese, 23wt% chromium, 8.5wt% nickel, 1.3wt% molybdenum, 0.28wt% nitrogen, the balance being iron and unavoidable impurities. The metal material for the CFB boiler wear plate is formed by casting an alloy containing the above components after melting in a furnace.

Example 4:

a contoured wear plate, see fig. 1-3.

As shown in fig. 1, the profiling wear-resistant plate comprises a plate body 1, an inner arc edge 11 matched with a pipeline of a boiler water wall is arranged on the inner side of the plate body 1, welding protrusions 12 are arranged between the adjacent inner arc edges 11, an outer arc edge 13 corresponding to the inner arc edge 11 is arranged on the outer side of the plate body 1, the adjacent outer arc edges 13 are in transition through smooth curved edges 14, and the plate body 1 is made of metal materials for the CFB boiler wear-resistant plate in the embodiment 1.

The physical photograph of the profiling wear plate 10 is shown in fig. 2, the usage mode of the profiling wear plate 10 is shown in fig. 3, when the profiling wear plate 10 is used, the profiling wear plate 10 in the multiple embodiments is overlapped end to end, welding protrusions between adjacent inner arc edges of the profiling wear plate 10 are welded on the fins 30 between adjacent pipelines, the inner arc edges of the inner side of the profiling wear plate 10 span the pipeline 20, and compared with the traditional wear plate, the profiling wear plate 10 of the embodiment is designed to be an outer arc edge, so that materials can be saved.

Example 5:

a contoured wear plate.

Compared with the embodiment 4, the profiling wear plate of the embodiment is made of the metal material for the CFB boiler wear plate in the embodiment 2.

Example 6:

a contoured wear plate.

Compared with the embodiment 4, the profiling wear plate of the embodiment is made of the metal material for the CFB boiler wear plate in the embodiment 3.

Example 7:

referring to fig. 4-6, a side wear plate is shown.

As shown in fig. 4 and 5, the lateral wear plate comprises a rectangular plate body 2, a welding block 21 is arranged on one side of the plate body 2, and the plate body 2 and the welding block 21 are made of metal materials for the wear plate of the CFB boiler in the embodiment 1. As shown in fig. 6, in use, the welding blocks on the lateral wear plate 40 are welded on the fins between adjacent pipes 20, and under the condition of high temperature, the plates of the lateral wear plate 40 are slightly deformed or have internal stress, and because the welding blocks are specially arranged between the lateral wear plate 40 and the fins, the welding spots between the welding blocks and the fins are concentrated, when the lateral wear plate is deformed or has internal stress, the situation that a plurality of welding spots are mutually strong does not exist on the lateral wear plate 40, so the lateral wear plate 40 cannot fall off from the fins. The contoured wear plate 10 and the lateral wear plate 40 are welded to the water wall to form a grid that acts as a turbulence to reduce the wear on the duct 20 caused by ash flow falling along the water wall.

Example 8:

a lateral wear plate.

Compared with example 7, the profiling wear plate of this example is made of the metal material for the CFB boiler wear plate of example 2.

Example 9:

a lateral wear plate.

Compared with example 7, the profiling wear plate of this example is made of the metal material for the CFB boiler wear plate of example 3.

Example 10:

a method for manufacturing an anti-wear plate is disclosed, please refer to FIGS. 7-15.

The method for manufacturing the wear plate in the embodiment is used for manufacturing the profiling wear plate in the embodiment 5, and specifically comprises the following steps:

(1) And manufacturing a wax film according to the shape of the wear-resistant plate to be manufactured, and then, tree-grouping the wax film.

In this step, since the wear plate manufacturing method of the present embodiment is used to manufacture the wear plate in embodiment 5, as shown in fig. 2 and 7, the wax film 50 manufactured in fig. 7 is identical to the shape of the profiling wear plate 10 in fig. 2, the wax film 50 is manufactured by the corresponding two mold halves 51 in fig. 7, and after the wax film 50 is manufactured, it is repaired by a wax trimming knife so that its shape conforms to the shape of the profiling wear plate.

One side of the wax film 50 is provided with a convex welding point 52, and as shown in fig. 8, the welding point 52 on the wax film 50 is welded on a bracket 54 at the lower part of a pouring mold 53, a plurality of wax film 50 groups form the structure shown in fig. 8, and the pouring mold 53 and the bracket 54 are also wax molds.

(2) The method comprises the following steps of:

(2.1) dipping slurry and coating sand on the whole structure of each wax film group tree in the step (1), wherein as shown in figure 9, after seven layers of sand coating, a layer of sand shell is formed outside the group tree structure;

(2.2) drying the tree structure subjected to slurry dipping and sand coating in a drying chamber, and then dewaxing in a dewaxing box, namely melting a wax film in a sand shell, a pouring gate mould 53 and a bracket 54 to form an empty sand shell, wherein the structure of the sand shell is shown in figure 10;

(2.3) roasting, as shown in FIG. 11, putting the sand shell in FIG. 10 into a roasting furnace, roasting at 1080-1100 ℃ for more than one half hour, taking out the sand shell after the roasting process is completed, and cooling for later use.

(3) Pouring: in this step, an alloy containing the metal material component for the CFB boiler wear plate in example 2 was taken and poured after melting in a furnace.

The raw materials used for manufacturing the metal material for the CFB boiler wear plate in the embodiment 2 in this example include 304 stainless steel, low carbon ferrochrome, ferrochrome nitride, ferromolybdenum, high carbon ferromanganese, nickel plate, ferrosilicon, and the specifications and proportions (by weight) of these alloys are shown in table 1, wherein the yields of the different elements are not 100% after these metal raw materials are put into the melting furnace for melting, and therefore, the specific gravity of each raw metal material is accurately calculated before the raw metal material is added, so that each element contained in the finally melted metal liquid coincides with the metal material component for the CFB boiler wear plate in the embodiment 2.

。

When the metal raw material is smelted, an intermediate frequency induction furnace is adopted for smelting, after smelting, the components of the smelted metal liquid are analyzed by a spectrum analyzer before casting, the components are adjusted according to the analysis result, and casting is carried out after the component content is qualified. As shown in fig. 12, during casting, molten metal is poured into the sand shell manufactured in the step (2) along the gate.

(4) And removing the outer shell of the casting molding member by more than 90% by vibrating the shell, performing shot blasting on the casting member to remove the residual shell, and then cutting and separating the wear-resisting plates connected together.

In this step, a shell vibrating machine is used to vibrate the shell, and as shown in fig. 13, the metal structure after the shell is removed and the metal structure is consistent with the tree structure in the previous group in fig. 8, and the redundant parts of the metal structure corresponding to the welding spots 52, the runner mold 53 and the bracket 54 on the previous tree structure are removed, and as shown in fig. 14, each profiling wear-resisting plate is cut from the whole metal structure during cutting.

After cutting, the rest materials are used for furnace return to avoid waste, but the furnace return materials are required to be added with new alloy materials for proportioning so as to ensure that each element component in the furnace return materials is matched with the required metal material components for the CFB boiler wear-resistant plate, in the embodiment, the furnace return materials are proportioned as shown in the following table 2, the rest materials for cutting account for 96.8%, the low-carbon ferrochrome accounts for 96.8%, the high-carbon ferromanganese accounts for 2.4%, the ferrosilicon accounts for 0.2%, the nickel plate accounts for 0.2% and the ferromolybdenum accounts for 0.2%, and the alloy specifications of the proportions are consistent with the corresponding alloy specifications in the table 1.

。

(5) Finishing: and (3) grinding the surfaces of the profiling wear-resistant plates after cutting and separating, and finally welding and polishing defects on the surfaces of the wear-resistant plates.

In this step, the polishing is performed to treat the surface of the profiling wear plate, and the surface is finished. The welding is to fill the incomplete part on the profiling wear-resistant plate, and after welding, the uneven part on the surface of the profiling wear-resistant plate is polished and refurbished by a polisher, and then the refurbished profiling wear-resistant plate is shot-blasted by chromium-molybdenum alloy steel shot to remove the surface oxide film, as shown in fig. 15. Finally, checking the appearance and the size of the copying wear-resistant plate after shot blasting according to the drawing requirements, and boxing and packing qualified products.

Comparative example 1:

comparative example 1 is a wear plate material currently used by applicant, comprising the following components in weight percent: 0.07% of C,0.9% of Si,0.8% of Mn,0.025% of P,0.002% of S,0.001% of Nb,22% of Cr,12% of Ni,0.23% of Mo,0.1% of Co,0.004% of Als,0.1% of V,0.05% of rare earth element and the balance of Fe, and the alloy raw material containing the proportioning element components in the comparative example 1 is added into an intermediate frequency electric furnace for melting according to the manufacturing method of the wear plate in the embodiment 10, and is poured into a profiling wear plate after being discharged.

Comparative example 2:

comparative example 2 is a wear plate material currently used by applicant, comprising the following components in weight percent: 0.14% of C,1.54% of Si,1.16% of Mn,0.04% of P,0.011% of S,0.0045% of Nb,25% of Cr,13.54% of Ni,0.29% of Mo,0.15% of Co,0.038% of Als,0.15% of V,0.15% of rare earth element and the balance of Fe, the alloy raw material containing the proportioning element components in the comparative example 1 is added into an intermediate frequency electric furnace for melting according to the manufacturing method of the wear plate in the embodiment 10, and poured into a profiling wear plate after being discharged.

Comparative example 3:

comparative example 3 is a wear plate material currently used by applicant, comprising the following components in weight percent: 0.073% C,0.98% Si,0.88% Mn,0.033% P,0.0028% S,0.004% Nb,22.91% Cr,12.36% Ni,0.24% Mo,0.13% Co,0.0076% Als,0.11% V,0.1% rare earth element, and the balance being Fe. According to the manufacturing method of the wear plate in the embodiment 10, alloy raw materials containing the proportioning element components in the comparative example 1 are added into an intermediate frequency electric furnace to be melted, and the alloy raw materials are poured into the profiling wear plate after being discharged.

The inventors conducted the related tests on the wear plates obtained in the previous examples 4 to 9 and comparative examples 1 to 3, respectively, and mainly examined the indexes of tensile strength, wear resistance, welding property and high temperature resistance, and the results are shown in the following table 3:

。

as can be seen from the comparative data in Table 3, the wear plates of examples 4-9 of the present application have overall better tensile strength than the wear plates of comparative examples 1-3; in the abrasion resistance detection, each test piece is polished and detected by a polisher under the same contact pressure, and the time required for abrasion is measured for 1mm, and as can be seen from Table 3, the abrasion resistance of the abrasion-proof plates prepared in examples 4 to 9 of the present application is overall better than that of the abrasion-proof plates in comparative examples 1 to 3; during welding performance detection, corresponding point positions of the anti-wear plates are welded on fins of the water-cooled wall, whether welding is easy or not and whether welding defects exist or not are observed, and as can be seen from Table 3, compared with the anti-wear plates in comparative examples 1-3, the anti-wear plates prepared in examples 4-9 are easier to weld and have good welding quality; in the case of high temperature resistance detection, the melting temperatures of the wear plates prepared in examples 4 to 9 of the present application and the wear plates in comparative examples 1 to 3 were measured by a thermal analyzer, respectively, and as shown in table 3, the melting temperatures of the wear plates prepared in examples 4 to 9 of the present application were higher and the heat resistance was stronger than those of the wear plates in comparative examples 1 to 3.

While the present invention has been described with reference to the drawings and the embodiments, those skilled in the art will understand that various specific parameters may be changed or equivalents may be substituted for related components, structures and materials in the above embodiments without departing from the technical concept of the present invention, so as to form a plurality of specific embodiments, which are common variations of the present invention and will not be described in detail herein.

Claims

1. The metal material for the CFB boiler wear plate is characterized by comprising the following components: 0.08 to 0.18 weight percent of carbon, 0 to 1.5 weight percent of silicon, 1 to 1.2 weight percent of manganese, 22 to 24 weight percent of chromium, 7 to 10 weight percent of nickel, 1.1 to 1.5 weight percent of molybdenum, 0.24 to 0.32 weight percent of nitrogen, and the balance of iron and unavoidable impurities.

2. The metal material for a CFB boiler wear plate according to claim 1, wherein the components of the metal material for a CFB boiler wear plate are: 0.18wt% carbon, 1.5wt% silicon, 1.2wt% manganese, 24wt% chromium, 10wt% nickel, 1.5wt% molybdenum, 0.32wt% nitrogen, the balance being iron and unavoidable impurities.

3. The metal material for a CFB boiler wear plate according to claim 1, wherein the components of the metal material for a CFB boiler wear plate are: 0.11wt% carbon, 1.12wt% manganese, 22.94wt% chromium, 7.6wt% nickel, 1.316wt% molybdenum, 0.256wt% nitrogen, the balance being iron and unavoidable impurities.

4. The metal material for a CFB boiler wear plate according to claim 1, wherein the components of the metal material for a CFB boiler wear plate are: 0.13wt% carbon, 0.75wt% silicon, 1.1wt% manganese, 23wt% chromium, 8.5wt% nickel, 1.3wt% molybdenum, 0.28wt% nitrogen, the balance being iron and unavoidable impurities.

5. The utility model provides a profile modeling abrasionproof board, includes the plate body, the plate body inboard is equipped with boiler water wall's pipeline assorted inner arc limit, adjacent be welding bulge between the inner arc limit, the plate body outside is equipped with the outer arc limit that corresponds to the inner arc limit, adjacent pass through smooth curved edge transition between the outer arc limit, its characterized in that, the material of plate body is the metal material for CFB boiler abrasionproof board of claim 1.

6. The utility model provides a side direction abrasionproof board, includes rectangular plate body, plate body one side is equipped with the welding piece, its characterized in that, the material of plate body and welding piece is the metal material for CFB boiler abrasionproof board of claim 1.

7. The method for manufacturing the wear plate is characterized by comprising the following steps of:

(2) Preparing a shell;

(3) Pouring: taking an alloy containing the metal material component for the CFB boiler wear plate as claimed in claim 1, and pouring the alloy after smelting in a smelting furnace;