CN104148616A

CN104148616A - Casting method for fusing metal gridding reinforcing body and a metal matrix

Info

Publication number: CN104148616A
Application number: CN201410376934.5A
Authority: CN
Inventors: 吴建化
Original assignee: Individual
Current assignee: Individual
Priority date: 2014-08-04
Filing date: 2014-08-04
Publication date: 2014-11-19
Anticipated expiration: 2034-08-04
Also published as: CN104148616B

Abstract

The invention provides a casting method for fusing a metal gridding reinforcing body and a metal matrix. The casting method comprises the following steps of fixing reinforcing bodies (1) by using metal grids (2); mounting the reinforcing bodies (1) in corresponding positions of a foam mould; injecting pre-foamed foam beads in the foam mould to obtain a bright and clean foam mould with reinforcing body metal grids; accurately positioning the reinforcing bodies (1); uniformly coating foam mould clusters by using foam mold casting coatings; performing vibratory modeling on the foam mould clusters in a casting sand box; connecting a vacuumizing system to the casting sand box; pouring qualified smelted liquid metal on the foam mould; performing vacuumizing while pouring; and taking out the foam mould after cooling down the foam mold so as to obtain a casting on which the reinforcing bodies (1) are fused at accurate surface positions of the metal matrix. By the casting method, the reinforcing bodies (1) can be accurately positioned and uniformly distributed on the casting of the metal matrix; after the metal grids (2) and the metal matrix are fused, a transitional layer is formed; the reinforcing bodies (1) can be firmly fused with the metal matrix; the yield of products is improved; the cost is effectively reduced; and the quality of products is guaranteed.

Description

The casting method that a kind of metal grill reinforcement and Metal Substrate merge

Technical field

The casting method that a kind of metal grill reinforcement of the present invention and Metal Substrate merge, is specifically related to a kind of casting method of locating reinforcement and Metal Substrate fusion with metal grill, belongs to casting field.

Background technology

On the casting surface or specific location, flipping a layer of special purpose of enhancing body (such as wear-resisting, corrosion resistant material) of traditional practices, was put in the foam mould will enhance body reserved cavity or will enhance body powder coated on the foam mould placeholder, adhesive for paste, foam mold after curing, directly for molding and pouring in the sand box, the whole system to maintain a certain pressure, under the high temperature of molten metal foam mould gasification disappear, the molten metal fills the cavity, enhance body consolidation in the position of the casting surface requirement, the method is simple, the cost is low, but cannot solve the enhancement of buoyancy, sinking, reunion, uneven distribution and accurate positioning problem, rejection rate is high, due to the effect of gravity or buoyancy, especially large particles reinforced body of sinking and floating, the cluster is unable to solve, the consolidation intensity difference in a body in the castings.

Summary of the invention

Collecting on the basis of domestic and international advanced technology data and practice, invent the casting method that a kind of metal grill reinforcement and Metal Substrate merge, be specifically related to a kind of casting method of locating reinforcement and Metal Substrate fusion with metal grill, solve better the accurate location of reinforcement and be uniformly distributed and the problem of consolidation strength, improve the qualification rate of product, effectively reduce costs, ensured product quality, foundry goods reinforcement and Metal Substrate merge firmly, foundry goods also has the characteristics such as the corresponding wear-resisting, Nai Erosion of reinforcement simultaneously.

The present invention is achieved through the following technical solutions:

The casting method that a kind of metal grill reinforcement and Metal Substrate merge, it is characterized in that: reinforcement metal grill fixes, the metal grill of having fixed reinforcement is arranged in the relevant position of foam mold, foam mold is injected the pre-foam beads of sending out, in the digester (-tor) at foam mold or foam mold place, pass into steam, bead in die cavity is expanded evenly, form with the bright and clean foam mould of metal grill of having fixed reinforcement, reinforcement is accurately positioned on the surface of foam mould, discharged steam and water flowing are cooling, in mould, take out Foam Pattern, Foam Pattern is carried out to drying and processing, Foam Pattern is assembled into Foam Pattern bunch, Foam Pattern bunch is evenly coated after the coating that foam die cast uses, Foam Pattern bunch is dried to processing, dried Foam Pattern bunch is delivered in foam die cast sandbox, carry out vibration molding, connect pumped vacuum systems, liquid metal qualified melting is poured into a mould, when cast, vacuumize, cooling rear taking-up, obtain the foundry goods on accurate location that reinforcement is cemented in Metal Substrate.

The casting method that a kind of metal grill reinforcement and Metal Substrate merge is characterized in that: the fusing point for the fusing point of the metallic mesh material of fixing reinforcement lower than Metal Substrate, after casting metal, metal grill melts and in Metal Substrate, forms transition zone, and reinforcement and Metal Substrate merge more firm.

The casting method that metal grill reinforcement and Metal Substrate merge is characterized in that: the fusing point of reinforcement is higher than a fusing point for Metal Substrate, as wear-resisting in graphite, carbide alloy, pottery etc., corrosion resistant material etc.

The casting method that a kind of metal grill reinforcement and Metal Substrate merge is characterized in that: the metal grill of fixing reinforcement is with perverse, the vestibule shape of grid and size adapt with reinforcement, can effectively fix reinforcement, comprise the reinforcement manufactured goods that graininess reinforcement and geometry are consistent.

Feature of the present invention is: adopt metal grill to fix reinforcement, pre-on the accurate surface location of foam mould, can effectively solve the inhomogeneous problem of floating, sinking, reunion, point Fabric of reinforcement, particularly when reinforcement particle is greatly and when the consistent reinforcement manufactured goods of geometry.

The hole of metal grill is the hole matching with reinforcement, and reinforcement can be fixed, be clamped to the perverse structure of being with of metal grill effectively, thereby the body that ensures to be enhanced merges the foundry goods on the accurate location of Metal Substrate.

The fusing point of metal grill, lower than the fusing point of Metal Substrate, forms an alloy transition layer after metal grill and Metal Substrate melting, can ensure the consolidation strength of reinforcement in Metal Substrate.

Facts have proved, the casting method that uses a kind of metal grill reinforcement and Metal Substrate to merge, produces wear resistance castings, reinforcement is evenly distributed, fixed firmly, product qualified rate reaches 99.8%, has obtained huge economic benefit and social benefit.

Brief description of the drawings

Accompanying drawing is reinforcement fixing structural representation in metal grill.

In figure: reinforcement 1, metal grill 2.

Accompanying drawing is embodiments of the invention.

Detailed description of the invention

Below in conjunction with accompanying drawing embodiments of the invention, the present invention will be further described in detail.

The invention provides the casting method that a kind of metal grill reinforcement and Metal Substrate merge, comprise the following steps:

Ready for (1) products mold, will enhance body 1 to 3 mm particles of carbide particles are arranged in 2 holes in the cavity of metal grid, metal mesh is 0.3 2 mm brass sheet stamping, hole cavity for prism shape barbed mesh size will be 3 mm particles into the, through mesh cavity deformation and pore space of fixed clamping, like diamonds and fixed on the ring, metal mesh size and shape is consistent with the product of 2;

(2) metal grill 2 of having fixed hard alloy particle is arranged on to the relevant position of foam mold and fixes;

(3) foamed material EPS prefoaming beading is injected to foam mold, in the digester (-tor) at mould or mould place, lead to steam, the EPS bead in die cavity is expanded evenly, form bright and clean apperance, and then discharged steam and water flowing cooling, and take out apperance post-drying in mould;

(4) apperance is assembled into apperance bunch, comprises sprue, cross gate and ingate, apperance bunch is evenly coated after the coating that foam die cast uses, send into drying room dry;

(5) multiple apperances bunch are delivered in foam die cast sandbox to vibration molding;

(6) the complete sandbox of moulding connects vacuum system, when liquid steel temperature qualified melting is controlled to 1580 DEG C, pours into a mould, and when cast, vacuumizes simultaneously, keeps negative pressure, is poured rear continuation and keeps negative pressure 1 minute, after molten steel cools freezes, takes out foundry goods;

(7) after continuation is completely cooling, polishing, polishing, obtain wear resistance castings module high-quality, that surface uniform distribution hard alloy particle base steel merges, there is no bubble, after brass metal grill 2 and molten steel melting, form the alloy transition layer of brass and steel, can make hard alloy particle fixed more firm, the wear resistance castings module that this hard alloy particle base steel merges, in obtaining carbide alloy high rigidity, high-wearing feature, entirety has higher intensity and good toughness, can save a large amount of expensive carbide alloy.

Facts have proved that the casting method of a kind of metal grill reinforcement and Metal Substrate fusion can solve the floating of reinforcement 1 effectively, sink, reunite, divide Fabric problem of non-uniform, this is because the fusing point of metal grill 2 is lower than the fusing point of Metal Substrate, the qualified Metal Substrate molten steel of melting injects apperance, metal grill 2 can melt, metal grill 2 forms alloy transition layer with Metal Substrate fusion, reduced the temperature of liquid metal simultaneously, reinforcement has little time in molten steel, to complete under the effect of gravity or buoyancy sinks or floating, liquid metal has just condensed into solid-state, the position of reinforcement 1 has been fixed by alloy transition layer, hard alloy particle is fixed more firm, the examination and test of products is all qualified, the material of selecting properly metal grill 2 and the rational molten steel filling temperature of control are key problem in technology, the present invention has broad application prospects.

Claims

1. the casting method that a metal grill reinforcement and Metal Substrate merge is characterized in that: reinforcement (1) metal grill (2) fixes, the metal grill (2) of having fixed reinforcement (1) is arranged in the relevant position of foam mold, foam mold is injected the pre-foam beads of sending out, in the digester (-tor) at foam mold or foam mold place, pass into steam, bead in die cavity expands evenly, form with the bright and clean foam mould of metal grill (2) of having fixed reinforcement (1), reinforcement (1) is accurately positioned on the surface of foam mould, discharged steam and water flowing are cooling, in mould, take out Foam Pattern, Foam Pattern is carried out to drying and processing, Foam Pattern is assembled into Foam Pattern bunch, Foam Pattern bunch is evenly coated after the coating that foam die cast uses, Foam Pattern bunch is dried to processing, dried Foam Pattern bunch is delivered in foam die cast sandbox, carry out vibration molding, connect pumped vacuum systems, liquid metal qualified melting is poured into a mould, when cast, vacuumize, cooling rear taking-up, the body (1) that is enhanced is cemented in the foundry goods on the accurate location of Metal Substrate.

2. the casting method that a kind of metal grill reinforcement according to claim 1 and Metal Substrate merge is characterized in that: the fusing point of metal grill (2) material of fixing reinforcement (1) is lower than the fusing point of Metal Substrate, metal grill after casting metal (2) melts and in Metal Substrate, forms transition zone, and reinforcement (1) merges more firm with Metal Substrate.

3. the casting method that a kind of metal grill reinforcement according to claim 1 and Metal Substrate merge is characterized in that: the fusing point of reinforcement (1) is higher than the fusing point of Metal Substrate.

4. the casting method that a kind of metal grill reinforcement according to claim 2 and Metal Substrate merge is characterized in that: the metal grill (2) of fixing reinforcement is with perverse, and the vestibule shape of grid and size adapt with reinforcement.