26results about How to "Reduce plasticity" patented technology

The invention relates to a preparation method of a multi-scale SiC particle heterostructure reinforced magnesium-based composite material, and belongs to the field of metal-based composite materials and preparation thereof. According to the preparation method, an in-situ authigenic second phase generated by rare earth elements is added, micron-scale, submicron-scale and nano-scale SiC reinforcement particles form a heterostructure formed due to size difference, and after a subsequent plastic deformation process, the multi-scale reinforcement particles form a heterostructure with a layered distribution characteristic; the effects of second phase strengthening, reinforcement particle strengthening and heterostructure strengthening are generated, and meanwhile the modulus and strength of the magnesium-based composite material are improved. And moreover, a stirring casting mode is adopted for preparation, the production process is shortened, the production cost is reduced, the high-modulus and high-strength magnesium-based composite material is prepared, and the preparation method has important significance in promoting application of the high-performance magnesium-based composite material and expanding the application range of the magnesium-based composite material in the fields of automobile industry, aerospace and the like.

The utility model provides a battery and electric equipment, and relates to the field of batteries. A battery includes a battery cell and a support. The battery monomer comprises a shell and a pressure relief component, the shell comprises a first wall part, and the pressure relief component is arranged on the first wall part. The pressure relief part comprises a first groove, and the pressure relief part is configured to be capable of cracking along the first groove when the battery monomer is subjected to pressure relief. The supporting piece supports the first wall part and is provided with a supporting face facing the first wall part, and the supporting face is provided with an avoiding part. The projection of the first groove is located in the avoiding part in the thickness direction of the first wall part. The avoiding part is arranged on the supporting piece, and the projection of the first groove in the thickness direction of the first wall part is located in the avoiding part, so that the avoiding part can avoid the first groove, the supporting piece is not easy to abut against the outer side of the first groove when the battery monomer is subjected to pressure relief, the cracking of the first groove is not easy to inhibit, and the service life of the battery monomer is prolonged. Therefore, the first groove can crack in time when the battery monomer is decompressed, and the reliability of the battery is improved.

The invention relates to the technical field of metal welding, and discloses a welding process of high-strength medium alloy carburizing steel, which comprises the following steps: preheating the whole weldment to 200-250 DEG C before welding; the overall temperature of a weldment is kept at 200-250 DEG C in the welding process; and after welding is completed, a weldment is integrally heated to 250-300 DEG C, and heat preservation is conducted for preset time. According to the scheme, a new preheating technology in the welding technology is provided for the high-strength medium alloy carburizing steel, overall preheating is adopted before welding, during welding and after welding instead of local preheating, the temperature ranges before welding and during welding are kept consistent, the temperature range after welding is slightly higher than the temperature ranges of the first two stages, it is advantageously kept that the temperature of a mother part in the whole welding stage is stable and uniform, and the welding quality is improved. The temperature gradient in the whole welding process is reduced to the minimum, and through appropriate process steps and welding parameters, it is guaranteed that weld joints do not have welding defects, and meanwhile the mechanical property requirements of products are met.

The invention provides a method for displaying and evaluating phosphorus segregation of a high-carbon steel wire rod, which comprises the detailed steps of preparing a sample, preparing a phosphorus segregation etching solution, displaying and evaluating the phosphorus segregation of the high-carbon steel wire rod, detecting a standard map and the like. Distilled water and ethyl alcohol are sequentially added, finally FeCl3 and CuCl2 are added, and the mixture needs to be heated to 400 DEG C on a heating plate; in the detection process, the prepared etchant is used for etching a detection sample by adopting a wiping method, an optical microscope is used for observation, the position, with the most serious white band shape, of the longitudinal section of the sample serves as a measurement position, and the grade is evaluated according to the comparison between the percentage of the white linear part and the manufactured standard map. The phosphorus segregation condition of the high-carbon steel wire rod can be clearly displayed, so that the phosphorus segregation detection process of the high-carbon steel wire rod is standardized and normalized, and the method can be widely applied to phosphorus segregation detection of various high-carbon steel wire rods.

This invention discloses a refractory high-entropy alloy resistant to high-temperature molten aluminum corrosion and erosion-wear, its preparation method, and its applications. The refractory high-entropy alloy of this invention comprises, by atomic percentage: 40-50 at.% Nb, 35-40 at.% Ti, 4-10 at.% Mo, 4.5-5 at.% Cr, and no more than 10 at.% Al. This invention obtains the refractory high-entropy alloy by mixing and melting the raw materials under a protective atmosphere. The refractory high-entropy alloy ingot of this invention has a single-phase BCC microstructure, exhibiting stable structure, good mechanical properties, and excellent resistance to molten aluminum corrosion and erosion-wear. The Nb-Ti-Mo-Cr based refractory high-entropy alloy resistant to molten aluminum corrosion and erosion-wear prepared using this invention can significantly improve the service life of components, reduce replacement frequency, and has high economic benefits.

The invention relates to a multi-principal-element alloy containing a second phase of a body-centered tetragonal structure and a preparation method of the multi-principal-element alloy, the multi-principal-element alloy comprises chemical components according to the atomic percent general formula of AlaCrbCocNid, a is greater than or equal to 14 and less than or equal to 16, b is greater than 24 and less than or equal to 26, c is equal to 17, d is greater than 42 and less than or equal to 44, and a + b + c + d is equal to 100. The method has the advantages that four components Al, Cr, Co and Ni are adopted, alloy burdening and smelting are conducted, and the multi-principal-component alloy is obtained through high-temperature heat treatment in a unique temperature interval and large-deformation room-temperature rolling. The prepared multi-principal-element alloy comprises a matrix of an L12 structure and a double-phase structure of a second phase of a body-centered tetragonal structure (BCT), and the second phase of the blocky BCT is large in size. The multi-principal-element alloy has high strength and good plasticity at the same time, the preparation process is simple, and safety is high.

The invention relates to a preparation method and application of a binary formula Dai pottery pug. The preparation method comprises the following steps: taking Dai pottery clay in the HongRiver basin, Wuhua soil in the HongRiver county and charcoal dust, and exposing and weathering the Dai pottery clay and the Wuhua soil for at least three months; the mass content of SiO2 in the Dai clay in the HongRiver basin is not less than 50%, the mass content of Al2O3 is not less than 15%, the mass content of Fe2O3 is not less than 10%, and the ignition loss is less than 10%; the content of SiO2 in the Wuhua soil in the Honghe county is 72%-82%, the content of Al2O3 is 9%-12%, and the content of Fe2O3 is 3%-5%; the preparation method comprises the following steps: adding water into the Dai pottery clay and the Wuhua soil according to the mass ratio of the Dai pottery clay to the Wuhua soil to the charcoal powder of (100-120): (40-50): (8-10), fully soaking, then carrying out ball milling, sieving slurry, then adding the charcoal powder, uniformly stirring, squeezing mud, draining, pugging and exhausting. According to the invention, the throwing and compression molding performances of the Dai pottery clay can be improved, the sintering temperature and the compactness and strength of the structure of the Dai pottery clay can be improved, and the burn out rate can be reduced.

The present invention is applicable to the technical field of high entropy alloys, and provides a multi-scale organization composite strengthening type high entropy alloy, which is composed of elements Co, Cr, Fe, Ni, Nb, and Mo, and the general formula in terms of atomic ratio is CoCrFeNiNbxMo0.4-x, wherein x=0.1-0.3; under the cast condition, the CoCrFeNiNbxMo0.4-x high entropy alloy is organized into an FCC matrix and a micron-sized Laves phase structure; after annealing, the CoCrFeNiNbxMo0.4-x high entropy alloy includes an FCC matrix, a micron-sized Laves phase, and an atomic-level SRO structure. The present invention also provides a method for preparing a multi-scale organization composite strengthening type high entropy alloy, comprising the following steps: according to the target atomic ratio, metal particles Co, Cr, Fe, Ni, Nb, and Mo are smelted to obtain a cast alloy; the cast alloy is annealed and quenched with water to obtain the multi-scale organization composite strengthening type high entropy alloy, and the annealing temperature is 600-800°C. The present invention constructs a composite microstructure of multi-scale precipitation phases and short-range order, and improves the yield strength and ultimate strength of the alloy while ensuring a certain plasticity.

The invention discloses an aluminum alloy profile for a rocket stringer and a preparation method of the aluminum alloy profile. The aluminum alloy profile for the rocket stringer consists of the following elements in percentage by weight: 2.2-2.4% of Cu, 2.9-3.4% of Mg, 7.3-7.9% of Zn, 0.05-0.15% of Zr, less than or equal to 0.05% of Fe, less than or equal to 0.1% of Si and the balance of Al. The preparation method comprises the steps of extrusion, solid solution heat treatment, stretch straightening, aging heat treatment and the like. The advantages of high purity, high strength, high rigidity, high safety and the like of the 7050-8 aluminum alloy material are utilized, development of the 7050-8 aluminum alloy profile product for the launch vehicle stringer is developed, core technologies such as mold design, extrusion forming, heat treatment strengthening and finishing treatment are overcome in the development process, the launch vehicle structure efficiency in China is improved, and the production cost is reduced. The prepared profile meets the application requirements of a new-generation carrier rocket structure, and application and iteration of a new aluminum alloy material are promoted.

The application provides a wide strip rolling method of TB, TC titanium alloy, which comprises the following steps: S1, preparing electrode blocks, and smelting the electrode blocks after group welding to obtain titanium ingots; S2, forging the titanium ingots into slabs, and rolling the slabs after surface treatment to medium-rolled plates with a thickness of 50-60 mm, and further rolling the medium-rolled plates to 5-6 mm wide strips; S3, treating the wide strips, cold-rolling the wide strips through the first pass to the third last pass to obtain cold-rolled preformed wide strips, cold-rolling the preformed wide strips through the second last pass and the last pass to obtain 1 mm wide strips, and carrying out on-line annealing on the wide strips. According to the application, the titanium alloy is smelted to ingots according to the characteristics of the titanium alloy, the scales on the surface of the ingots are removed after coiling, and the ingots are directly cold-rolled after grinding, so that the titanium alloy wide strips of TB and TC series with a thickness of less than 1.0 mm can be rolled.

The invention provides a titanium-niobium composite microalloying nitrogen-controlled 82B wire rod and a preparation method, and relates to the technical field of high-carbon hard wire production. The diameter of the 82B wire rod ranges from 11 mm to 12.5 mm, and the 82B wire rod is prepared from, by mass, 0.80%-0.85% of C, 0.60%-0.90% of Mn, 0.12%-0.32% of Si, 0.010%-0.015% of N, 0.020%-0.030% of Ti, 0.010%-0.015% of Nb, smaller than or equal to 0.025% of S, smaller than or equal to 0.025% of P, smaller than or equal to 0.20% of Cu and smaller than or equal to 0.20% of Ni. And the balance of Fe and inevitable impurities. The titanium-niobium composite microalloying nitrogen-controlled 82B wire rod is prepared by reasonably selecting Ti and Nb to be compositely added, continuously casting to form a blank and performing temperature-controlled cold rolling; the method is simple and easy to operate, wide in application range and beneficial to industrial large-scale production and popularization.

The invention discloses a material for producing a low-carbon high-molybdenum stainless steel pipeline and a preparation method of the material, and belongs to the technical field of metal material preparation, and the low-carbon high-molybdenum stainless steel pipeline is made of a low-carbon high-molybdenum stainless steel material. Comprising the following chemical element components in percentage by weight: 0.01-0.02% of carbon (C), 20.0-22.5% of chromium (Cr), 15.0-18.5% of nickel (Ni), 5.5-8.8% of molybdenum (Mo) and the like. The material preparation method comprises the following steps of raw material preparation, smelting, refining, casting, intermediate heat treatment, final heat treatment and cold machining. Wherein the intermediate heat treatment comprises the step of carrying out solution treatment on a material obtained by casting. The invention discloses a low-carbon and high-molybdenum stainless steel material for producing a low-carbon and high-molybdenum stainless steel pipeline, which has more than 5% of molybdenum (Mo) content, and has better corrosion resistance, high-temperature strength and creep resistance. Through solution treatment, the toughness and plasticity of the low-carbon high-molybdenum stainless steel cannot be reduced in the preparation process, and the corrosion resistance cannot be reduced.

The invention discloses multifunctional biofuel raw material processing equipment. The multifunctional biofuel raw material processing equipment comprises a heating dryer, a feeder and a pre-dehydration mechanism, the pre-dehydration mechanism sequentially comprises a coagulator and a dehydration box from top to bottom; an interlayer of the coagulator is filled with liquid nitrogen, the upper end and the lower end of the coagulator communicate with the interiors of the feeder and the dehydration box correspondingly, a filter cover is vertically and fixedly arranged at the position of a feeding opening of the dehydration box located above the second smashing mechanism, and at least two material suction fans are horizontally and fixedly arranged on the two sides of the dehydration box located above the filter cover correspondingly; according to the multifunctional biofuel raw material processing equipment, rapid dehydration can be achieved through the pre-dehydration mechanism, in the dehydration process, the multi-stage smashing function can be achieved, in the smashing process, it is avoided that raw materials are wound in the smashing mechanism, and normal use of the smashing mechanism is affected; and the dehydrated and crushed raw materials can be quickly dried through the heating dryer, so that the drying efficiency is improved.

The invention discloses a method for dispersion strengthening of a FeCrAl-based alloy through nano ZrC, and belongs to the technical field of powder metallurgy. According to the method, nano ZrC powder is doped into the FeCrAl-based alloy, and the carbide dispersion strengthening alloy (the nano ZrC dispersion strengthening FeCrAl-based alloy) is prepared through mechanical alloying and spark plasma sintering, so that the original plasticity of the material is kept, and the strength of the material is improved; the yield strength and the tensile strength of the FeCrAl-based alloy are obviously optimized, the tensile strength can reach 1058 MPa, the overall mechanical property of the FeCrAl-based alloy is improved, and the FeCrAl-based alloy has stable mechanical property in a high-temperature long-time exposure environment and is expected to be widely applied to the engineering field.

The invention discloses a method for refining 316L stainless steel grains based on a selective laser melting technology, and belongs to the technical field of metal material additive manufacturing. According to the method, Fe-C-B alloy powder is added, a Fe-B or Fe-B-Cr type compound is formed to serve as a heterogeneous nucleation core when the 316L stainless steel component is manufactured through selective laser melting, columnar crystal epitaxial growth is inhibited, and grain refinement is achieved. By means of the synergistic effect formed by Fe, C and B, the negative influence of the SLM technology on the 316L stainless steel forming process is avoided, the advantages of the SLM technology are fully exerted in the 316L stainless steel component forming process, accordingly, the 316L stainless steel component high in compactness and excellent in comprehensive performance can be formed only through SLM, the method is stable in process, low in crack sensitivity and high in yield, and the production cost is reduced. The method has remarkable advantages in the field of additive manufacturing of high-performance 316L stainless steel components.

The application discloses a preparation method of a silver tin oxide electric contact material with good plasticity and arc erosion resistance, and comprises the following steps: first, taking Ag ingot, Sn ingot and X ingot of an additive element to prepare Ag-Sn alloy powder with a required particle size; the obtained powder is oxidized to obtain AgSnO2 mother powder; then, the required amounts of Ag, Sn and X elements are calculated according to the component proportion of the required preparation material, and are weighed for standby, wherein the Sn and X elements are weighed in the form of AgSnO2 mother powder, and the Ag element is weighed in the form of silver nitrate and AgSnO2 mother powder; then, an alkaline substance in excess of silver nitrate is weighed, and the alkaline substance and the silver nitrate are respectively prepared into solutions; then, the weighed AgSnO2 mother powder is added into the alkaline solution, and the silver nitrate solution is continuously added for reaction to obtain AgSnO2 powder; and finally, the obtained powder is prepared into a silver tin oxide electric contact through a conventional process. The contact prepared by adopting the method has good plasticity and arc erosion resistance.

The invention relates to a corrosion-resistant alloy, in particular to a corrosion-resistant alloy and a preparation method of a plate made of the corrosion-resistant alloy. The corrosion-resistant alloy comprises the following chemical components in percentage by mass: 22 to 23 percent of Cr, 41 to 42 percent of Ni, 2.8 to 3.3 percent of Mo, 2.0 to 2.5 percent of Cu, 0.8 to 1.0 percent of Ti, 0.003 to 0.005 percent of Mg, less than or equal to 0.15 percent of Al, less than or equal to 0.05 percent of C, less than or equal to 0.3 percent of S i, less than or equal to 1.0 percent of Mn, less than or equal to 0.03 percent of P, less than or equal to 0.02 percent of S and the balance of Fe. The preparation method of the corrosion-resistant alloy plate comprises the steps of intermediate frequency furnace smelting, electrode bar die casting, electroslag remelting, forging, hot rolling and water cooling, coping, solid solution pickling and cold rolling. According to the method, pollution generated in the smelting process can be reduced, the alloy return scraps are fully utilized, the yield of alloy elements is increased, the production cost is reduced, the corrosion resistance, strength and plasticity of corrosion-resistant metal are improved, and burning loss of metal elements in the smelting process is reduced.

The application provides a battery cell, a battery device and a power utilization device. The battery cell comprises a shell and a pressure relief mechanism, the shell has a wall portion, and the pressure relief mechanism is arranged on the wall portion. The pressure relief mechanism is provided with a weak portion configured to be at least partially destroyed when the pressure or temperature in the battery cell reaches a threshold value. The pressure relief mechanism is provided with a plurality of grooves, the plurality of grooves comprises a first groove and a second groove, the weak portion is arranged outside the first groove, and the second groove is arranged outside the weak portion. When a part of the pressure relief mechanism located in the area surrounded by the first groove is subjected to an external force, the position of the pressure relief mechanism provided with the first groove is prone to deformation and absorption of the external force; when a part of the pressure relief mechanism located outside the area surrounded by the second groove is subjected to an external force, the position of the pressure relief mechanism provided with the second groove is prone to deformation and absorption of the external force, thereby reducing the stress transmitted to the weak portion, reducing the risk of premature cracking of the weak portion, and being beneficial to improving the service life of the battery cell.

The invention provides high-strength and high-hole-expansion steel. The high-strength and high-hole-expansion steel comprises, by mass, 0.04%-0.12% of carbon, smaller than or equal to 0.1% of silicon, 1.3%-1.7% of manganese, smaller than or equal to 0.002% of sulfur, smaller than or equal to 0.015% of phosphorus, 0.01%-0.03% of niobium, 0.0014%-0.06% of vanadium, 0.1%-0.15% of titanium, 0.08%-0.18% of molybdenum, 0.02%-0.05% of acid-soluble aluminum and smaller than or equal to 0.006% of nitrogen. The high-strength and high-hole-expansion steel prepared by the preparation method disclosed by the invention has relatively good hole expansion property while considering the strength, and is high in practicability and worthy of popularization.

The invention relates to Y-doped high-carbon-content austenitic low-density steel and a preparation method thereof, and belongs to the technical field of metal materials, and the Y-doped high-carbon-content austenitic low-density steel comprises the following chemical components in percentage by mass: 1.5-2.0 wt% of C, less than or equal to 0.2 wt% of Si, 25-30 wt% of Mn, 7-10 wt% of Al, 0.01-0.3 wt% of Y, less than or equal to 0.015 wt% of P, less than or equal to 0.008 wt% of S and the balance of Fe. According to the method, the Y-doped high-carbon-content austenitic low-density steel is subjected to homogenization treatment, primary hot rolling, secondary hot rolling and water cooling in sequence after being smelted, and the Y-doped high-carbon-content austenitic low-density steel has high strength synergistically contributed by grain boundary strengthening, solid solution strengthening and large-proportion shearable precipitation strengthening. And by adding Y, formation of harmful grain boundary precipitated phases and inclusions is inhibited, the plastic loss of the material is reduced, and the oxidation resistance of the material is enhanced.

The invention discloses a low-performance-deviation aluminum foil blank and a preparation method thereof, and belongs to the technical field of aluminum alloy material processing. The aluminum foil disclosed by the invention is prepared from the following components in percentage by mass: 0.6%-0.75% of Fe, 0.45%-0.55% of Si, 0.04%-0.06% of Cu, 0.04%-0.06% of Zn, 0.01%-0.03% of Mn, 0.01%-0.03% of Cr, 0.01%-0.02% of Mg, 0.01%-0.03% of Ti and the balance of Al. The manufacturing method comprises the steps of burdening, smelting, cast rolling, primary cold rolling, homogenizing annealing, rough rolling and finish rolling. The content of Fe and Si in the aluminum foil is optimized, and the aluminum foil which is high in surface quality, good in plate shape, small in performance deviation in the transverse direction, the longitudinal direction and the 45-degree direction and excellent in comprehensive mechanical performance is obtained in combination with the sectional type homogenizing annealing and the hot rolling and cold rolling preparation technology.

The invention provides a cast aluminum alloy alterant and a preparation process thereof. The cast aluminum alloy alterant comprises Sb, Ti, B, V, La-Ce mixed rare earth and microelements Be and Hf. The preparation process comprises the steps of smelting, refining, continuous rolling and experimental verification. According to the alterant raw materials for the cast aluminum alloy and the preparation technology, the aluminum alloy quality problem caused by the fact that Na, P and Sr elements are added into an aluminum alloy alterant is avoided, the modification effect of the structure and performance of the cast aluminum alloy is effectively improved, and the room-temperature mechanical performance of the cast aluminum alloy is improved; the production cost is reduced, the production efficiency and the product quality are improved, and batch production and high automation are achieved.

The invention relates to a shape control method for a casing forge piece for a large gas turbine. The shape control method comprises the following steps that S1, blanking is conducted; step S2, chamfering is carried out; s3, upsetting and punching are carried out; s4, cooling after forging; s5, primary annealing is conducted, and heat preservation is conducted on the forged piece at the temperature of 690 + / -40 DEG C; s6, trestle chambering is conducted, and the forging temperature ranges from 900 DEG C to 1150 DEG C; s7, secondary annealing is conducted, specifically, the forged piece is annealed and subjected to heat preservation, and the annealing temperature is 690 DEG C + / -40 DEG C; step S8, normalizing: normalizing the forge piece and preserving heat at the normalizing temperature of 1130 + / -5 DEG C; s9, primary tempering is conducted, specifically, the forge piece is tempered and subjected to heat preservation, and the tempering temperature is 760 + / -5 DEG C; s10, quenching is conducted, specifically, the forge piece is quenched, and the quenching temperature is 1120 + / -5 DEG C; s11, secondary tempering is conducted, specifically, the forge piece is tempered, and the tempering temperature is 680 + / -5 DEG C; and S12, stress relief annealing is conducted, and the stress relief annealing temperature is 630 + / -5 DEG C. The method has the advantages that the performance stability is improved, and the cracking phenomenon of the product caused by stress concentration is avoided to the maximum extent.

This invention discloses high impact-resistant Ti 2 The method for preparing medium-thick AlNb alloy plates is as follows: Step 1: Using NbTi master alloy, HTi, Al alloy, and Mo65Al master alloy as raw materials, all raw materials are pressed into an electrode block and subjected to three VAR melting processes; Step 2: Ti alloy is prepared using a free forging method. 2 AlNb alloy free forging slab; Step 3: Using hot rolling method, Ti 2 AlNb alloy free-forged slabs are rolled into Ti 2 AlNb alloy medium-thick slabs are then straightened; Step 4: The straightened Ti... 2 AlNb alloy medium-thick slabs undergo double heat treatment followed by machining to obtain Ti. 2 AlNb alloy medium-thick plate finished product. This method solves the problem of existing Ti 2 AlNb alloy plates suffer from insufficient impact resistance, complex preparation processes, and poor microstructure uniformity. High-impact Ti alloys were also disclosed. 2 AlNb alloy medium-thick plate.

The present invention provides a method and device for preparing hydrophobic surface and strengthening forming by laser etching of aluminum alloy assisted by magnetic field force, comprising the following steps: fixing the two ends of the aluminum alloy on a fixture; a planar spiral coil and a laser are located directly above the surface of the aluminum alloy to be processed; the planar spiral coil generates a pulsed magnetic field, and the laser beam is located at the center of the pulsed magnetic field; laser etching is used to form a remelting groove and deposited spatter on the surface of the aluminum alloy to be processed, and the remelting groove and deposited spatter constitute a micro-nano multi-level structure; the pulsed magnetic field induces eddy currents on the surface of the aluminum alloy, and an induced magnetic field is formed by the eddy currents, the magnetic field direction of the induced magnetic field is opposite to the magnetic field direction of the pulsed magnetic field, and the repulsive force of the two magnetic fields causes the surface of the aluminum alloy to be processed to deform; the surface energy of the material is reduced by chemical modification of the processed surface of the aluminum alloy, and a curved aluminum alloy surface with super-hydrophobicity is obtained. The present invention can effectively prepare a curved reinforced aluminum alloy with a super-hydrophobic surface.

The invention belongs to the technical field of grinding of grinding tools, and discloses a brittle corrosion-resistant metallic bond, a metallic bond superhard grinding wheel and a preparation method of the metallic bond superhard grinding wheel. The brittle corrosion-resistant metal bonding agent prepared by the invention comprises the following raw materials in parts by weight: 50-70 parts of copper powder, 5-20 parts of tin powder, 5-15 parts of graphite powder and 15-20 parts of an improvement additive. Graphite powder and an improvement additive are added into a traditional bronze-based metal binding agent, secondary heat treatment is carried out, the plasticity of the binding agent is reduced, the brittleness and hardness of the binding agent are improved, brittle fracture can occur in time, and the workpiece quality cannot be affected; through secondary heat treatment, elements in the improvement additive form a uniform and compact protective film on the grinding wheel, internal metal can be continuously prevented from being corroded in the whole life cycle of the grinding wheel, and the thickness consistency problem caused by corrosion of the side face in the using process of the grinding wheel is solved. The brittleness and corrosion resistance of the bronze-based metal bonding agent are improved on the premise that the cost is not obviously increased.