CN109972051B - Yttrium modified high-hardness alloy and casting method thereof - Google Patents

Yttrium modified high-hardness alloy and casting method thereof Download PDF

Info

Publication number
CN109972051B
CN109972051B CN201910403269.7A CN201910403269A CN109972051B CN 109972051 B CN109972051 B CN 109972051B CN 201910403269 A CN201910403269 A CN 201910403269A CN 109972051 B CN109972051 B CN 109972051B
Authority
CN
China
Prior art keywords
powder
casting
alloy
yttrium
temperature
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
CN201910403269.7A
Other languages
Chinese (zh)
Other versions
CN109972051A (en
Inventor
罗丰华
王宸
刘笑
黄明初
李国平
赵林
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Central South University
Original Assignee
Central South University
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from CN201810587830.7A external-priority patent/CN108570609A/en
Priority claimed from CN201810589023.9A external-priority patent/CN108707836A/en
Priority claimed from CN201810589048.9A external-priority patent/CN108707837A/en
Application filed by Central South University filed Critical Central South University
Publication of CN109972051A publication Critical patent/CN109972051A/en
Application granted granted Critical
Publication of CN109972051B publication Critical patent/CN109972051B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C33/00—Making ferrous alloys
    • C22C33/04—Making ferrous alloys by melting
    • C22C33/06—Making ferrous alloys by melting using master alloys
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/005—Ferrous alloys, e.g. steel alloys containing rare earths, i.e. Sc, Y, Lanthanides
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
    • C22C38/24—Ferrous alloys, e.g. steel alloys containing chromium with vanadium
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
    • C22C38/26—Ferrous alloys, e.g. steel alloys containing chromium with niobium or tantalum
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
    • C22C38/32—Ferrous alloys, e.g. steel alloys containing chromium with boron

Abstract

An yttrium modified high-hardness alloy and a casting method thereof, wherein the content of each element of the alloy is Cr: 9.0-13.0, B: 2.6-2.9, C:0.7 to 0.9, Nb: 0.4-0.8, V: 0.4-0.8, Mn content less than 0.3, Y: 0.02-1.6 wt% of Fe, and the balance being Fe, wherein the total amount of C, B is 3.3-3.6 wt%; C/Cr content ratio: 0.06 to 0.08; the total amount of Nb and V is 0.5-1.0, firstly preparing Fe-Y2O3, Fe-yttrium carbonate or Fe-yttrium nitrate powder briquetting, and casting the alloy after alloy batching, smelting and modification treatment, wherein the casting temperature is 1250-1320 ℃. The average hardness of the cast ingot is HRC 66.5-70.5, the impact toughness reaches 11.8-16.3J/cm 2, and the bending strength reaches 1260-1690 MPa.

Description

Yttrium modified high-hardness alloy and casting method thereof
Technical Field
The invention belongs to the field of high-hardness wear-resistant cast iron, and relates to an alloy of wear-resistant and corrosion-resistant cast iron with a yttrium element modified fine hard phase, a supersaturated solid solution and a martensite matrix phase and a preparation method of a component thereof, which can be widely used for manufacturing mechanical wear-resistant parts in the industries of electric power, metallurgy, machinery, chemical industry and the like.
Technical Field
Fe-Cr-B-C wear-resistant casting alloy mainly containing Fe2B or M2B is a hard phase, has good toughness, high hardness, high corrosion resistance and good smelting-casting manufacturability. Modification treatment is one of effective methods for improving the texture and mechanical properties of Fe-Cr-B-C alloy. The modificator can be classified into strong carbon, nitrogen, sulfide-forming elements such as Ti, V, etc., and strong undercooling elements such as surface active elements Rare Earth (RE), Mg, etc., according to their effects.
The rare earth elements are gathered on a liquid-solid growth interface to limit the growth of crystal grains so as to improve the hardness, strength and wear resistance of the alloy; and the structure is refined, so that the boride is in broken net shape and granular distribution, and the impact toughness is improved. The research shows that: the addition of 0.6% cerium (Ce) to the Fe-Cr-B-C alloy improves the impact toughness by 86.4%. Adding 1.0% (Ce + La) of mixed alterant into Fe-Cr-B alloy, the hardness of the alloy is increased from 52HRC to 70.2HRC, and the impact toughness is increased from 3.36J/cm2Increased to 6.38J/cm2。
The rare earth modification can be a single modification method of rare earth alloy or rare earth wire, or composite modification treatment can be adopted, namely a mixture of elements such as N, Ti, V, Mg, Si and the like and rare earth is used as a modifier. The silicon-magnesium mixed rare earth alterant is most commonly a composite modification method, and researches show that: after the Fe-Cr-B-C alloy is modified by RE-Si-Mg, the impact toughness is improved by 72.2 percent compared with that before modification; after RE-Ti modification and heat treatment, the impact toughness is improved by 1.8 times; the RE-Mg modified impact toughness is improved by 34.6 percent; after the RE-Ti-N is modified, the net structure is completely disappeared, and the toughness is improved by 133.3%; after RE-Mg-V-Ti modification treatment, the impact toughness reaches 15.6J/cm2(ii) a After RE-Ti-Si-V modification treatment, the impact toughness reaches 12J/cm2The above.
These methods using rare earth modification all have a common difficulty, namely high activity pure rare earth, rare earth alloy or composite rare earth materials. Due to the high activity of the rare earth, the structure and the performance of the alterant or the alloy after the alteration treatment are difficult to control, and the alteration effect is difficult to ensure.
Document 1: LM cathode study-emission principle and present study [ D ]]Beijing university of industry, 2001: pp 44-50. Carbonized La2O3Chemical equilibrium of Mo alloy:
3Mo2C(s)+La2O3(s)＝2La(s,l)+3CO(g)+6Mo
due to Mo2C has much smaller change of free enthalpy of reduction reaction for generating the simple substance La, so that the equilibrium partial pressure of La and CO of reaction products is also 10 orders of magnitude higher. When the temperature is higher than 1673K, namely 1400 ℃, and the CO partial pressure is lower than E-9atm, the reaction formula automatically proceeds to the right, namely, the simple substance La is generated by reduction.
Patent document 2: the prepared wear-resistant alloy has the authorized bulletin number CN 105695884B, the hardness of HRC 66-70 and the impact toughness of 4-9J/cm2. The alloy has high hardness, but insufficient impact toughness, low strength index and low bending strength within the range of 346-477 MPa, and limits the application of the alloy to occasions with large external load and impact resistance.
Disclosure of Invention
The invention aims to provide an yttrium modified high-hardness alloy and a casting method thereof. The method employs yttrium oxide (Y)2O3) The carbide and boride in the Fe-Cr-B-C alloy in a high-temperature melting state have thermodynamic conditions for promoting the formation of high-activity Y elements, and a Y-containing compound is formed at C, B, so that the structure of the cast alloy is refined, the carborundum is in a broken net shape and is in granular distribution, and the impact toughness is improved.
Due to Y2O3The yttrium nitrate or yttrium carbonate has low density, and when the yttrium nitrate or yttrium carbonate is directly added into the melt in a powder state, the Y element can float upwards along with the slag to cause loss of the modification effect, so that the Y element adopted by the invention is Y2O3And yttrium nitrate or yttrium carbonate powder and iron powder are uniformly mixed, and then are molded into powder pressing blocks, and then are melted together with the Fe-Cr-B-C casting alloy. Y is2O3The weight ratio of the yttrium nitrate powder to the iron powder is 1: 3-19, and mixed briquettes containing Fe-3.94-19.71% of Y are formed, or the weight ratio of the yttrium nitrate powder to the iron powder is 1: 4-10, and mixed briquettes containing Fe-2.11-4.64% of Y are formed, or the weight ratio of the yttrium carbonate powder to the iron powder is 1: 3-13, and mixed briquettes containing Fe-3.09-10.8 wt.% of Y are formed. If the Y content is too low, the Fe content is too high, which affects the ingredient calculation; when the Y content is too high, green compact formation is difficult. Wherein Y is2O3The powder is white amorphous powder with the content of more than 99.0 percent, or yttrium nitrate is a hydrated compound, the content of yttrium nitrate is more than 99.0 percent after drying and dehydration treatment before batching, or yttrium carbonate is a hydrated compound, and the content of yttrium nitrate is more than 99.0 percent after drying and dehydration treatment before batching. The Fe powder is reduced Fe powder or water atomized Fe powder, and the Fe powder can contain alloy elements in the modified cast iron or elements in the impurity range, such as Ni, V, Cr and the like, so as to be subject to the conditions of not influencing briquetting and influencing the batching calculation.
The invention selects the Fe-Cr-B-C alloy with high wear resistance and high corrosion resistance of the patent document 2 as a basic alloy, and then 0.02-1.6% of Y element is added for modification. Forming a multi-element eutectic alloy containing Fe, Cr, B, C, Nb, V, Y and other elements, wherein the mass percentage of each element is Cr: 9.0-13.0, B: 2.6-2.9, C:0.7 to 0.9, Nb: 0.4-0.8, V: 0.4-0.8, Mn content less than 0.3, Y:0.02 to 1.6, S, P: less than or equal to 0.01, and the balance being Fe. Where C, B sums: 3.3 to 3.6; C/Cr content ratio: 0.06 to 0.08; the sum of Nb and V is 0.5 to 1.0. Using Fe-Y2O3The powder compact is 0.02-0.6% Y; or adopting Fe-yttrium nitrate powder briquettes with the weight of 0.05-1.0% of Y; or 0.08-1.6% Y of Fe-yttrium carbonate powder briquettes are adopted.
In patent document 2, for the specific preparation of an alloy, ferrochrome (high carbon, medium carbon, and micro carbon), ferroboron, ferroniobium, ferrovanadium, pure iron, and the like can be used in accordance with the component requirements. The raw materials and their components are listed in table 1.
TABLE 1 raw materials and compositions applicable to the preparation of the alloys of the invention
Figure BDA0002060451310000031
The raw material components of table 1 are not exclusive, and the specific components are determined by the raw materials that are actually available. Where ferrochrome, metallic chromium, ferroboron, ferroniobium and ferrovanadium provide the Cr, B, Nb and V content of the inventive alloy, high carbon ferrochrome is used to balance the C content. The pure iron can be electrician pure iron, electromagnetic pure iron or industrial pure iron.
The method specifically comprises the following steps:
(1) y element carrier-Y element-containing powder compact preparation
Fe-Y2O3Powder briquetting: using iron powder and Y2O3After the powders are mixed evenly, the mixture is pressed into powder briquettes. Y is2O3The mass ratio of the powder to the iron powder is approximately 1: 3-19, namely Fe-Y with Fe-3.94-19.71% of Y is formed2O3And (4) mixing and briquetting.
Or Fe-yttrium nitrate powder briquettes: iron powder and yttrium nitrate powder are uniformly mixed and molded into powder compacts. The mass ratio of the yttrium nitrate powder to the iron powder is approximately 1: 4-10, namely forming Fe-yttrium nitrate mixed compact of Fe-2.11-4.64 wt.% Y. Used as a carrier for rare earth Y modification.
Or Fe-yttrium carbonate powder briquettes: iron powder and yttrium carbonate powder are uniformly mixed and molded into powder compacts. The mass ratio of the yttrium carbonate powder to the iron powder is approximately 1: 3-13, and the Fe-yttrium carbonate mixed briquette of Fe-3.09-10.8 wt.% Y is formed.
(2) Alloy proportioning, smelting and modification treatment
Weighing corresponding raw materials according to the component requirement of the Fe-Cr-B-C alloy, and adding 0.02-1.6% of Y element for modification. Firstly Fe-Y2O3And pressing Fe-yttrium nitrate or Fe-yttrium carbonate powder blocks at the bottom of the furnace, and then adding ferrochrome, metal chromium, ferroboron, ferroniobium, ferrovanadium and pure iron. The alloy can be prepared by smelting in an induction furnace, a vacuum induction furnace and the like.
The melting temperature is 1500-1660 ℃; after the materials are completely melted, reducing the power of the electric furnace, reducing the temperature of the melt to 1300-1380 ℃, and deoxidizing by using pure aluminum accounting for 0.1-0.15% of the total amount of the ingredients; and keeping the temperature and standing for about 5-10 minutes.
(3) Casting of
The casting temperature range is 1250-1320 ℃. The cooling speed from the solidification temperature to 600 ℃ should not be lower than 60 ℃/min, but volume change can be caused due to nonequilibrium transformation, and stress cracking phenomenon can be caused due to inconsistent temperature when large castings are prepared, so that the castings should be free from the constraint of the mold at the temperature of 600-800 ℃. The ingot can be subjected to a stress relief annealing process at a temperature of less than 600 ℃ and necessary machining procedures.
The alloy of the invention has deep eutectic composition, and can form non-equilibrium matrix structure, such as amorphous, nanocrystalline or martensite structure, under the condition of common sand mold casting. Because the designed alloy is eutectic composition, the melt has good fluidity and can be cast and formed by various methods, such as common sand mold casting or special casting methods of investment casting, lost foam casting, metal mold casting, ceramic mold casting, die casting, centrifugal casting and the like.
The iron powder in the step (1) is reduced iron powder with the purity of more than or equal to 98.5 percent and the granularity of 100 meshes, or water atomized iron powder with the purity of more than or equal to 99.0 percent and the granularity of 100 meshes, or alloy iron powder with equivalent granularity and a small amount of alloy ingredients which do not influence casting. It is also possible to select a powder of smaller particle size, so as to be able to be pressed with green strength that does not affect the preparation of the subsequent charge and burden.
And (2) uniformly mixing the materials in the step (1) into a mixing barrel type mixing material, a V-shaped mixing material or a stirring mixing material to realize substantial uniformity.
The pressed blank in the step (1) is formed by die pressing, the pressing pressure is 100-600 MPa, and the size of the pressed blank is not limited. Cold isostatic pressing methods may also be employed.
Step (2) adding Fe-Y2O3The purpose of placing the Fe-yttrium nitrate or Fe-yttrium carbonate powder pressing block at the furnace bottom is as follows: ferrochromium, ferroboron, etc. have a lower melting temperature than pure iron and thus will preferentially melt and infiltrate the Fe-Y in the bottom2O3Briquetting of powder of Fe-yttrium nitrate or Fe-yttrium carbonate to obtain pure ironThe powder gradually melts and Y is released2O3Powder particles; or yttrium nitrate pyrolysis to produce fine Y2O3And an oxynitride compound; or yttrium carbonate pyrolysis to produce fine Y2O3And CO2. Due to Y2O3Has a low density of about 5.01g/cm3The melt will gradually float up. At Y2O3Process of powder floating up by Fe3C、Cr3C2The isocarbides are reduced to form the active Y element and react with C, B to form a structure similar to Y (B, C)6The compound of (1). Through the modification of Y, the reticular structure and the acicular boride distributed along the crystal disappear, the alloy consists of a primary crystal matrix phase and a eutectic structure, and the eutectic structure is formed by interpenetration of a fine matrix phase and a hard phase, so that the strength and the impact toughness of the alloy are improved.
Y2O3The CO gas formed in the powder floating and reaction processes also has the functions of degassing and deslagging, thereby further purifying the melt. Oxynitride and CO2The floating process is helpful for degassing and deslagging the solution.
If Y is2O3Yttrium nitrate or yttrium carbonate powder is easily and quickly floated to the surface of the melt without being prepared into briquettes and placed on the bottom of the furnace, the oxygen content on the surface of the melt is high, and Y is2O3Is not easy to be reduced to form active Y, and loses the metamorphic effect.
Said Fe3C、Cr3C2The carbide is formed by the reaction of high carbon ferrochrome and C and Fe element during melting, because of Fe3C、Cr3C2Isocarbides have lower stability at high temperature than Mo2C and the melting temperature exceeds the 1400 ℃ reaction temperature described in document 1, the partial pressure of CO gas in the melt is also extremely low; since Y has properties similar to those of La, the reduction reaction to form active Y proceeds similarly to document 1. EDS spectroscopy also indicates that the casting alloy phase contains Y element.
And (3) casting, namely casting by means of water cooling, iron mold, cold iron placed in a mold and the like, so as to further promote the unbalanced transformation of the matrix and form high-hardness martensite.
The Y modification method of the invention is not limited to Fe-Cr-B-C alloy, and can also be applied to the smelting modification and refining treatment of other cast iron and steel with higher C content.
The main characteristic of the invention is that Y is directly used2O3Yttrium nitrate or yttrium carbonate powder is mixed with iron powder to form powder compact which is used as Y element modified carrier. Utilizing Fe in Fe-Cr-B-C alloy high-temperature melt3C、Cr3C2The reduction of the isocarbides forms the active Y element and reacts with C, B to form a structure similar to Y (B, C)6The compound of (2) avoids the appearance of boride net-shaped and needle-shaped structures, promotes the formation of fine eutectic structures, and plays a role in modifying and toughening refined structures. The matrix phase of the ingot casting structure is a non-equilibrium structure strengthened by Cr, B and C with high hardness; the hard phase is a high-hardness boron and carbon compound and forms a fine eutectic structure with the matrix phase. By Y2O3The hardness of the cast ingot as a raw material reaches HRC 66.5-69.6, and the impact toughness reaches 12.5-16.3J/cm2The bending strength reaches 1260-1662 MPa; or yttrium nitrate is used as a raw material, the hardness of the cast ingot reaches HRC 67.0-70.5, and the impact toughness reaches 11.8-15.8J/cm2The bending strength reaches 1360-1690 MPa; or yttrium carbonate is used as a raw material, the hardness of the cast ingot reaches HRC 66.92-70.3, and the impact toughness reaches 12.0-16.0J/cm2The bending strength reaches 1432-1690 MPa.
Drawings
FIG. 1 cast structure of example 6 of the invention;
FIG. 2 cast alloy X-ray diffraction pattern of example 6 of the present invention;
FIG. 3 EDS spectra and composition of matrix phase of casting of example 6 of the invention;
FIG. 4 cast structure of example 15 of the invention;
FIG. 5 cast structure of example 25 of the invention.
Detailed Description
The various melting and casting methods of the present invention are not limited by the following examples, and any modifications and variations within the scope of the claims of the present invention are within the scope of the present invention.
Selecting high-carbon ferrochrome, micro-carbon ferrochrome, metal chromium, ferroboron, ferroniobium, ferrovanadium, industrial pure iron, pure iron powder and Y2O3Yttrium nitrate, yttrium carbonate powder, pure aluminum and the like are used as raw materials and are prepared into alloy within the composition range required by the invention.
Example 1 use of iron powder with Y2O3After the powders are mixed evenly, the mixture is pressed into powder briquettes. Y is2O3The mass ratio of powder to iron powder is approximately 1:3, i.e., Fe-Y forming Fe-19.71 wt.% Y2O3And (4) mixing and briquetting. Used as a carrier for rare earth Y modification.
Selecting high-carbon ferrochrome, micro-carbon ferrochrome, ferroboron, ferroniobium, ferrovanadium, industrial pure iron and the Fe-Y2O3The mixed briquettes are taken as raw materials and have the following component ranges: 10.0 wt.% Cr; 2.9 wt.%; 0.7 wt.% C; nb:
0.4 wt.%; 0.2 wt.% V; 0.6 wt.% Y; the impurity elements are controlled as shown in Table 2. Small amounts of Al, Mn, N, etc. impurities do not cause radical changes in the properties of the alloy and are therefore not listed in Table 2. After weighing the corresponding raw materials according to the required mixture ratio of the components, adopting induction melting and sand mould casting. The method comprises the following specific steps:
mixing Fe-Y2O3The powder pressing block is placed at the bottom of the furnace, and then ferrochrome, metal chromium, ferroboron, ferroniobium, ferrovanadium and pure iron are placed in the furnace. The melting temperature is 1660 ℃; after the materials are completely melted, reducing the power of the electric furnace, reducing the temperature of the melt to 1380 ℃, and deoxidizing by using pure aluminum accounting for 0.15 percent of the total amount of the ingredients; the incubation was continued for about 10 minutes. The casting temperature range was 1300 ℃. About 6 minutes after casting, the sand mold was opened, at which point the ingot temperature was below 800 ℃ and the cooling rate from the solidification temperature to 800 ℃ was about 70 ℃/min. And air-cooling to room temperature. The integral hardness of the obtained cast ingot reaches HRC68.2, and the impact toughness reaches 12.6J/cm2The bending strength reaches 1380 MPa.
Example 2 use of iron powder with Y2O3After the powders are mixed evenly, the mixture is pressed into powder briquettes. Y is2O3The mass ratio of powder to iron powder is approximately 1:19, i.e., Fe-Y forming Fe-3.94 wt.% Y2O3And (4) mixing and briquetting. As rare earth Y modificatesAnd (3) a carrier.
Selecting high-carbon ferrochrome, metallic chromium, ferroboron, ferroniobium, industrial pure iron and the Fe-Y2O3The mixed briquettes are taken as raw materials and have the following component ranges: 10.0 wt.% Cr; 2.7 wt.%; 0.7 wt.% C; 0.5 wt.% Nb; 0.02 wt.% Y; the impurity elements are controlled as shown in Table 2. Small amounts of Al, Mn, N, etc. impurities do not cause radical changes in the properties of the alloy and are therefore not listed in Table 2. After the corresponding raw materials are weighed according to the component requirement, a vacuum induction furnace can be adopted for smelting and water-cooling iron mold casting. The method comprises the following specific steps:
mixing Fe-Y2O3The powder pressed block is placed at the bottom of the furnace, and then ferrochrome, metal chromium, ferroboron, ferroniobium and pure iron are placed in the furnace. The melting temperature is 1560 ℃; after the materials are completely melted, reducing the power of the electric furnace, reducing the temperature of the melt to 1300 ℃, and deoxidizing by using pure aluminum accounting for 0.1 percent of the total amount of the ingredients; the incubation was continued for about 5 minutes. The casting temperature range was 1250 ℃. About 10 minutes after casting, the water-cooled iron mold was opened, at which point the ingot temperature was below 600 ℃ and the cooling rate from the solidification temperature to 600 ℃ was about 70 ℃/min. And air-cooling to room temperature. The integral hardness of the obtained cast ingot reaches HRC69.6, and the impact toughness reaches 13.4J/cm2The bending strength reaches 1260 MPa.
Example 3 use of iron powder with Y2O3After the powders are mixed evenly, the mixture is pressed into powder briquettes. Y is2O3The mass ratio of powder to iron powder is approximately 1:10, i.e., Fe-Y forming Fe-7.17 wt.% Y2O3And (4) mixing and briquetting. Used as a carrier for rare earth Y modification.
Selecting high-carbon ferrochrome, micro-carbon ferrochrome, ferroboron, ferroniobium, industrial pure iron and the Fe-Y2O3The mixed briquettes are taken as raw materials and have the following component ranges: cr:10.0 wt.%; b:2.7 wt.%; 0.8 wt.% C; 0.6 wt.% Nb; 0.10 wt.% Y; the impurity elements are controlled as shown in Table 2. Small amounts of Al, Mn, N, etc. impurities do not cause radical changes in the properties of the alloy and are therefore not listed in Table 2. After weighing corresponding raw materials according to the component requirement, adopting induction melting and investment casting, and specifically comprising the following steps:
mixing Fe-Y2O3Placing the powder compact at the bottom of the furnace, and then placingFerrochromium, chromium metal, ferroboron, ferroniobium, ferrovanadium and pure iron. The melting temperature is 1580 ℃; after the materials are completely melted, reducing the power of the electric furnace, reducing the temperature of the melt to 1320 ℃, and deoxidizing by using pure aluminum accounting for 0.12 percent of the total amount of the ingredients; the incubation was continued for about 8 minutes. The casting temperature range was 1280 ℃. And opening the sand mold investment mold about 10 minutes after the casting is finished, wherein the ingot casting temperature is lower than 700 ℃, and the cooling rate from the solidification temperature to 700 ℃ is about 60 ℃/min. And air-cooling to room temperature. The integral hardness of the obtained cast ingot reaches HRC67.6, and the impact toughness reaches 16.3J/cm2The bending strength reaches 1460 MPa.
Example 4 use of iron powder with Y2O3After the powders are mixed evenly, the mixture is pressed into powder briquettes. Y is2O3The mass ratio of powder to iron powder is approximately 1:15, i.e., Fe-Y forming Fe-4.93 wt.% Y2O3And (4) mixing and briquetting. Used as a carrier for rare earth Y modification.
Selecting high-carbon ferrochrome, metal chromium, ferroboron, ferroniobium, ferrovanadium, industrial pure iron and the Fe-Y2O3The mixed briquettes are taken as raw materials and have the following component ranges: cr: 11.0 wt.%; b:2.7 wt.%; 0.7 wt.% C; 0.2 wt.% Nb; 0.4 wt.% V; 0.20 wt.% Y; the impurity elements are controlled as shown in Table 2. Small amounts of Al, Mn, N, etc. impurities do not cause radical changes in the properties of the alloy and are therefore not listed in Table 2. After weighing corresponding raw materials according to the component requirement, adopting induction melting and sand mold casting, and specifically comprising the following steps:
mixing Fe-Y2O3The powder pressing block is placed at the bottom of the furnace, and then ferrochrome, metal chromium, ferroboron, ferroniobium, ferrovanadium and pure iron are placed in the furnace. The melting temperature is 1600 ℃; after the materials are completely melted, reducing the power of the electric furnace, reducing the temperature of the melt to 1350 ℃, and deoxidizing by using pure aluminum accounting for 0.13 percent of the total amount of the ingredients; the incubation was continued for about 9 minutes. The casting temperature range was 1280 ℃. About 7 minutes after casting, the sand mold was opened, at which point the ingot temperature was below 800 ℃ and the cooling rate from the solidification temperature to 800 ℃ was about 60 ℃/min. And air-cooling to room temperature. The integral hardness of the obtained cast ingot reaches HRC66.8, and the impact toughness reaches 12.5J/cm2The bending strength reaches 1520 MPa.
Example 5 use of iron powderAnd Y2O3After the powders are mixed evenly, the mixture is pressed into powder briquettes. Y is2O3The mass ratio of powder to iron powder is approximately 1:4, i.e., Fe-Y forming Fe-15.77 wt.% Y2O3And (4) mixing and briquetting. Used as a carrier for rare earth Y modification.
Selecting high-carbon ferrochrome, micro-carbon ferrochrome, ferroboron, ferroniobium, ferrovanadium, industrial pure iron and the Fe-Y2O3The mixed briquettes are taken as raw materials and have the following component ranges: cr:10.0 wt.%; b: 2.6 wt.%; c: 0.6 wt.%; nb: 0.3 wt.%; v: 0.1 wt.%; 0.30 wt.% Y; the impurity elements are controlled as shown in Table 2. Small amounts of Al, Mn, N, etc. impurities do not cause radical changes in the properties of the alloy and are therefore not listed in Table 2. After weighing corresponding raw materials according to the component requirement, adopting induction melting and lost foam casting, and specifically comprising the following steps:
mixing Fe-Y2O3The powder pressing block is placed at the bottom of the furnace, and then ferrochrome, metal chromium, ferroboron, ferroniobium, ferrovanadium and pure iron are placed in the furnace. The melting temperature was 1650 ℃; after the materials are completely melted, reducing the power of the electric furnace, reducing the temperature of the melt to 1325 ℃, and deoxidizing by using pure aluminum accounting for 0.12 percent of the total amount of the ingredients; the incubation was continued for about 6 minutes. The casting temperature range was 1285 ℃. And opening the lost foam sand mold about 8 minutes after the casting is finished, wherein the ingot casting temperature is lower than 700 ℃, and the cooling rate from the solidification temperature to 700 ℃ is about 70 ℃/min. And air-cooling to room temperature. The integral hardness of the obtained cast ingot reaches HRC69.5, and the impact toughness reaches 14.7J/cm2The bending strength reaches 1360 MPa.
Example 6 use of iron powder with Y2O3After the powders are mixed evenly, the mixture is pressed into powder briquettes. Y is2O3The mass ratio of powder to iron powder is approximately 1:18, i.e., Fe-Y forming Fe-4.15 wt.% Y2O3And (4) mixing and briquetting. Used as a carrier for rare earth Y modification.
Selecting high-carbon ferrochrome, micro-carbon ferrochrome, ferroboron, ferroniobium, industrial pure iron and the Fe-Y2O3The mixed briquettes are taken as raw materials and have the following component ranges: cr:10.0 wt.%; b: 2.6 wt.%; c:0.8 wt.%; nb: 0.8 wt.%; 0.40 wt.% Y; the impurity elements are controlled as shown in Table 2. Small amount of Al, Mn, N and other impurities can not causeThe alloy properties vary fundamentally and are therefore not listed in table 2. After weighing corresponding raw materials according to the component requirement, adopting vacuum induction melting and iron mold casting, and specifically comprising the following steps:
mixing Fe-Y2O3The powder pressing block is placed at the bottom of the furnace, and then ferrochrome, metal chromium, ferroboron, ferroniobium, ferrovanadium and pure iron are placed in the furnace. The melting temperature is 1590 ℃; after the materials are completely melted, reducing the power of the electric furnace, reducing the temperature of the melt to 1315 ℃, and deoxidizing by using pure aluminum accounting for 0.14% of the total amount of the ingredients; the incubation was continued for about 7 minutes. The casting temperature range was 1290 ℃. About 10 minutes after casting, the iron mold was opened, at which point the ingot temperature was below 600 ℃ and the cooling rate from the solidification temperature to 600 ℃ was about 70 ℃/min. And air-cooling to room temperature. The integral hardness of the obtained cast ingot reaches HRC66.5, and the impact toughness reaches 15.6J/cm2The bending strength reaches 1546 MPa.
FIG. 1 is a cast alloy structure, mainly including an Fe primary crystal phase and a eutectic phase, wherein the eutectic phase is a eutectic structure of an Fe phase and boron and carbon compounds; FIG. 2 is an X-ray diffraction pattern of the cast alloy showing that the alloy matrix is the alpha-Fe phase, the diffraction peak is broad, and is wide near 65 degrees, so that the alloy is a martensite phase with a large amount of Cr dissolved in solid solution, and the carbon and boron compounds are Fe2B、Fe3C and Cr23C6A complex compound based thereon, and shown with Y (B, C)6The presence of a compound; FIG. 3 is EDS spectrum of matrix phase of cast alloy and analysis result, EDS can only qualitatively analyze components, and result shows that Y element exists in alloy, which shows that Y element exists in alloy2O3The Y element is alloyed with the melt to change the quality of the melt.
Example 7 use of iron powder with Y2O3After the powders are mixed evenly, the mixture is pressed into powder briquettes. Y is2O3The mass ratio of powder to iron powder is approximately 1:8, i.e., Fe-Y forming Fe-8.76 wt.% Y2O3And (4) mixing and briquetting. Used as a carrier for rare earth Y modification.
Selecting high-carbon ferrochrome, micro-carbon ferrochrome, ferroboron, ferroniobium, ferrovanadium, industrial pure iron and the Fe-Y2O3The mixed briquettes are taken as raw materials and have the following component ranges: cr:11.0 wt.%; b: 2.6 wt.%; c: 0.9 wt.%; nb:0.2 wt.%; v:0.2 wt.%; 0.50 wt.% Y; the impurity elements are controlled as shown in Table 2. Small amounts of Al, Mn, N, etc. impurities do not cause radical changes in the properties of the alloy and are therefore not listed in Table 2. After the corresponding raw materials are weighed according to the component requirement, induction melting and lost foam casting can be adopted. The method comprises the following specific steps:
mixing Fe-Y2O3The powder pressing block is placed at the bottom of the furnace, and then ferrochrome, metal chromium, ferroboron, ferroniobium, ferrovanadium and pure iron are placed in the furnace. The melting temperature is 1620 ℃; after the materials are completely melted, reducing the power of the electric furnace, reducing the temperature of the melt to 1350 ℃, and deoxidizing by using pure aluminum accounting for 0.13 percent of the total amount of the ingredients; the incubation was continued for about 8 minutes. The casting temperature range was 1260 ℃. About 9 minutes after casting, the lost foam mold was opened, at which point the ingot temperature was below 600 ℃ and the cooling rate from the solidification temperature to 600 ℃ was about 70 ℃/min. And air-cooling to room temperature. The integral hardness of the obtained cast ingot reaches HRC68.4, and the impact toughness reaches 13.2J/cm2The bending strength reaches 1662 MPa.
Example 8 use of iron powder with Y2O3After the powders are mixed evenly, the mixture is pressed into powder briquettes. Y is2O3The mass ratio of powder to iron powder is approximately 1:12, i.e., Fe-Y forming Fe-6.06 wt.% Y2O3And (4) mixing and briquetting. Used as a carrier for rare earth Y modification.
Selecting high-carbon ferrochrome, micro-carbon ferrochrome, ferroboron, ferroniobium, ferrovanadium, industrial pure iron and the Fe-Y2O3The mixed briquettes are taken as raw materials and have the following component ranges: cr: 13.0 wt.%; b: 2.6 wt.%; c:0.8 wt.%; nb:0.6 wt.%; v:0.4 wt.%; 0.06 wt.% Y; the impurity elements are controlled as shown in Table 2. Small amounts of Al, Mn, N, etc. impurities do not cause radical changes in the properties of the alloy and are therefore not listed in Table 2. After weighing corresponding raw materials according to the component requirement, adopting induction melting and lost foam casting, and specifically comprising the following steps:
mixing Fe-Y2O3The powder pressing block is placed at the bottom of the furnace, and then ferrochrome, metal chromium, ferroboron, ferroniobium, ferrovanadium and pure iron are placed in the furnace. The melting temperature is 1600 ℃; after the molten alloy is completely melted, the power of the electric furnace is reduced, and the molten alloy is meltedAfter the temperature is reduced to 1320 ℃, pure aluminum accounting for 0.12 percent of the total amount of the ingredients is used for deoxidation; the incubation was continued for about 6 minutes. The casting temperature range was 1280 ℃. About 9 minutes after casting, the lost foam mold was opened, at which point the ingot temperature was below 700 ℃ and the cooling rate from the solidification temperature to 700 ℃ was about 60 ℃/min. And air-cooling to room temperature. The integral hardness of the obtained cast ingot reaches HRC69.0, and the impact toughness reaches 16.0J/cm2The bending strength reaches 1432 MPa.
Example 9 iron powder and yttrium nitrate powder were uniformly mixed and then molded into a powder compact. The mass ratio of yttrium nitrate powder to iron powder was approximately 1:4, i.e., an Fe-yttrium nitrate mixed compact of Fe-4.64 wt.% Y was formed. Used as a carrier for rare earth Y modification.
High-carbon ferrochrome, micro-carbon ferrochrome, ferroboron, ferroniobium, ferrovanadium, industrial pure iron and the Fe-yttrium nitrate mixed pressing block are selected as raw materials, and the component ranges are as follows: 10.0 wt.% Cr; 2.9 wt.%; 0.7 wt.% C; 0.4 wt.% Nb; 0.2 wt.% V; 1.0 wt.% Y; the impurity elements are controlled as shown in Table 2. Small amounts of Al, Mn, N, etc. impurities do not cause radical changes in the properties of the alloy and are therefore not listed in Table 2. After weighing the corresponding raw materials according to the required mixture ratio of the components, adopting induction melting and sand mould casting. The method comprises the following specific steps:
putting the Fe-yttrium nitrate powder briquette at the bottom of the furnace, and then putting ferrochrome, metal chromium, ferroboron, ferroniobium, ferrovanadium and pure iron. The melting temperature is 1600 ℃; after the materials are completely melted, reducing the power of the electric furnace, reducing the temperature of the melt to 1350 ℃, and deoxidizing by using pure aluminum accounting for 0.15 percent of the total amount of the ingredients; the incubation was continued for about 10 minutes. The casting temperature range was 1300 ℃. About 6 minutes after casting, the sand mold was opened, at which point the ingot temperature was below 800 ℃ and the cooling rate from the solidification temperature to 800 ℃ was about 70 ℃/min. And air-cooling to room temperature. The integral hardness of the obtained cast ingot reaches HRC68.6, and the impact toughness reaches 11.8J/cm2The bending strength reaches 1386 MPa.
Example 10 iron powder and yttrium nitrate powder were uniformly mixed and then molded into a powder compact. The mass ratio of yttrium nitrate powder to iron powder was approximately 1:10, i.e., an Fe-yttrium nitrate mixed compact of Fe-2.11 wt.% Y was formed. Used as a carrier for rare earth Y modification.
Selecting high-carbon ferrochrome, metallic chromium, ferroboron, ferroniobium, industrial pure iron and the Fe-Y2O3The mixed briquettes are taken as raw materials and have the following component ranges: 10.0 wt.% Cr; 2.7 wt.%; 0.7 wt.% C; 0.5 wt.% Nb;
0.05 wt.% Y; the impurity elements are controlled as shown in Table 2. Small amounts of Al, Mn, N, etc. impurities do not cause radical changes in the properties of the alloy and are therefore not listed in Table 2. After the corresponding raw materials are weighed according to the component requirement, a vacuum induction furnace can be adopted for smelting and water-cooling iron mold casting. The method comprises the following specific steps:
putting the Fe-yttrium nitrate powder briquette on the furnace bottom, and then putting ferrochrome, metal chromium, ferroboron, ferroniobium and pure iron. The melting temperature is 1520 ℃; after the materials are completely melted, reducing the power of the electric furnace, reducing the temperature of the melt to 1300 ℃, and deoxidizing by using pure aluminum accounting for 0.1 percent of the total amount of the ingredients; the incubation was continued for about 5 minutes. The casting temperature range was 1250 ℃. About 10 minutes after casting, the water-cooled iron mold was opened, at which point the ingot temperature was below 600 ℃ and the cooling rate from the solidification temperature to 600 ℃ was about 70 ℃/min. And air-cooling to room temperature. The integral hardness of the obtained cast ingot reaches HRC70.4, and the impact toughness reaches 12.6J/cm2The bending strength reaches 1360 MPa.
EXAMPLE 11A powder compact was obtained by molding after uniformly mixing with yttrium nitrate powder. The mass ratio of yttrium nitrate powder to iron powder was approximately 1:8, i.e., an Fe-yttrium nitrate mixed compact of Fe-2.58 wt.% Y was formed. Used as a carrier for rare earth Y modification.
Selecting high-carbon ferrochrome, micro-carbon ferrochrome, ferroboron, ferroniobium, industrial pure iron and the Fe-Y2O3The mixed briquettes are taken as raw materials and have the following component ranges: cr:10.0 wt.%; b:2.7 wt.%; 0.8 wt.% C; 0.6 wt.% Nb; y:0.08 wt.%; the impurity elements are controlled as shown in Table 2. Small amounts of Al, Mn, N, etc. impurities do not cause radical changes in the properties of the alloy and are therefore not listed in Table 2. After weighing corresponding raw materials according to the component requirement, adopting induction melting and investment casting, and specifically comprising the following steps:
putting the Fe-yttrium nitrate powder briquette at the bottom of the furnace, and then putting ferrochrome, metal chromium, ferroboron, ferroniobium, ferrovanadium and pure iron. The melting temperature is 1580 ℃; to be completedAfter melting, reducing the power of the electric furnace, reducing the temperature of the melt to 1320 ℃, and deoxidizing by using pure aluminum accounting for 0.12 percent of the total amount of the ingredients; the incubation was continued for about 8 minutes. The casting temperature range was 1280 ℃. And opening the sand mold investment mold about 10 minutes after the casting is finished, wherein the ingot casting temperature is lower than 700 ℃, and the cooling rate from the solidification temperature to 700 ℃ is about 60 ℃/min. And air-cooling to room temperature. The integral hardness of the obtained cast ingot reaches HRC68.2, and the impact toughness reaches 15.8J/cm2The bending strength reaches 1480 MPa.
Example 12 iron powder and yttrium nitrate powder were uniformly mixed and then molded into a powder compact. The mass ratio of yttrium nitrate powder to iron powder was approximately 1:5, i.e., an Fe-yttrium nitrate mixed compact of Fe-3.87 wt.% Y was formed. Used as a carrier for rare earth Y modification.
Selecting high-carbon ferrochrome, metal chromium, ferroboron, ferroniobium, ferrovanadium, industrial pure iron and the Fe-Y2O3The mixed briquettes are taken as raw materials and have the following component ranges: cr: 11.0 wt.%; b:2.7 wt.%; 0.7 wt.% C; 0.2 wt.% Nb; 0.4 wt.% V; 0.10 wt.% Y; the impurity elements are controlled as shown in Table 2. Small amounts of Al, Mn, N, etc. impurities do not cause radical changes in the properties of the alloy and are therefore not listed in Table 2. After weighing corresponding raw materials according to the component requirement, adopting induction melting and sand mold casting, and specifically comprising the following steps:
putting the Fe-yttrium nitrate powder briquette at the bottom of the furnace, and then putting ferrochrome, metal chromium, ferroboron, ferroniobium, ferrovanadium and pure iron. The melting temperature is 1550 ℃; after the materials are completely melted, reducing the power of the electric furnace, reducing the temperature of the melt to 1320 ℃, and deoxidizing by using pure aluminum accounting for 0.13 percent of the total amount of the ingredients; the incubation was continued for about 9 minutes. The casting temperature range was 1280 ℃. About 7 minutes after casting, the sand mold was opened, at which point the ingot temperature was below 800 ℃ and the cooling rate from the solidification temperature to 800 ℃ was about 60 ℃/min. And air-cooling to room temperature. The integral hardness of the obtained cast ingot reaches HRC67.6, and the impact toughness reaches 11.8J/cm2The bending strength reaches 1560 MPa.
Example 13 iron powder and yttrium nitrate powder were mixed uniformly and then molded into a powder compact. The mass ratio of yttrium nitrate powder to iron powder was approximately 1:7, i.e., an Fe-yttrium nitrate mixed compact of Fe-2.9 wt.% Y was formed. Used as a carrier for rare earth Y modification.
High-carbon ferrochrome, micro-carbon ferrochrome, ferroboron, ferroniobium, ferrovanadium, industrial pure iron and the Fe-yttrium nitrate mixed pressing block are selected as raw materials, and the component ranges are as follows: cr:10.0 wt.%; b: 2.6 wt.%; c: 0.6 wt.%; nb: 0.3 wt.%; v: 0.1 wt.%; 0.20 wt.% Y; the impurity elements are controlled as shown in Table 2. Small amounts of Al, Mn, N, etc. impurities do not cause radical changes in the properties of the alloy and are therefore not listed in Table 2. After weighing corresponding raw materials according to the component requirement, adopting induction melting and lost foam casting, and specifically comprising the following steps:
putting the Fe-yttrium nitrate powder briquette at the bottom of the furnace, and then putting ferrochrome, metal chromium, ferroboron, ferroniobium, ferrovanadium and pure iron. The melting temperature is 1600 ℃; after the materials are completely melted, reducing the power of the electric furnace, reducing the temperature of the melt to 1325 ℃, and deoxidizing by using pure aluminum accounting for 0.12 percent of the total amount of the ingredients; the incubation was continued for about 6 minutes. The casting temperature range was 1285 ℃. And opening the lost foam sand mold about 8 minutes after the casting is finished, wherein the ingot casting temperature is lower than 700 ℃, and the cooling rate from the solidification temperature to 700 ℃ is about 70 ℃/min. And air-cooling to room temperature. The integral hardness of the obtained cast ingot reaches HRC70.5, and the impact toughness reaches 13.8J/cm2The bending strength reaches 1380 MPa.
Example 14 using iron powder and yttrium nitrate powder, powder compacts were molded. The mass ratio of yttrium nitrate powder to iron powder was approximately 1:6, i.e., an Fe-yttrium nitrate mixed compact of Fe-3.31 wt.% Y was formed. Used as a carrier for rare earth Y modification.
Selecting high-carbon ferrochrome, micro-carbon ferrochrome, ferroboron, ferroniobium, industrial pure iron and the Fe-Y2O3The mixed briquettes are taken as raw materials and have the following component ranges: cr:10.0 wt.%; b: 2.6 wt.%; c:0.8 wt.%; nb: 0.8 wt.%; 0.50 wt.% Y; the impurity elements are controlled as shown in Table 2. Small amounts of Al, Mn, N, etc. impurities do not cause radical changes in the properties of the alloy and are therefore not listed in Table 2. After weighing corresponding raw materials according to the component requirement, adopting vacuum induction melting and iron mold casting, and specifically comprising the following steps:
putting the Fe-yttrium nitrate powder briquette on the furnace bottom, and then putting ferrochromium, metal chromium, ferroboron and niobiumIron, ferrovanadium and pure iron. The melting temperature is 1590 ℃; after the materials are completely melted, reducing the power of the electric furnace, reducing the temperature of the melt to 1315 ℃, and deoxidizing by using pure aluminum accounting for 0.14% of the total amount of the ingredients; the incubation was continued for about 7 minutes. The casting temperature range was 1290 ℃. About 10 minutes after casting, the iron mold was opened, at which point the ingot temperature was below 600 ℃ and the cooling rate from the solidification temperature to 600 ℃ was about 70 ℃/min. And air-cooling to room temperature. The integral hardness of the obtained cast ingot reaches HRC67.0, and the impact toughness reaches 14.9J/cm2The bending strength reaches 1640 MPa.
Example 15 iron powder and yttrium nitrate powder were uniformly mixed and then molded into a powder compact. The mass ratio of yttrium nitrate powder to iron powder was approximately 1:9, i.e., an Fe-yttrium nitrate mixed compact of Fe-2.32 wt.% Y was formed. Used as a carrier for rare earth Y modification.
High-carbon ferrochrome, micro-carbon ferrochrome, ferroboron, ferroniobium, ferrovanadium, industrial pure iron and the Fe-yttrium nitrate mixed pressing block are selected as raw materials, and the component ranges are as follows: cr: 11.0 wt.%; b: 2.6 wt.%; c: 0.9 wt.%; nb:0.2 wt.%; v:0.2 wt.%; 0.80 wt.% Y; the impurity elements are controlled as shown in Table 2. Small amounts of Al, Mn, N, etc. impurities do not cause radical changes in the properties of the alloy and are therefore not listed in Table 2. After the corresponding raw materials are weighed according to the component requirement, induction melting and lost foam casting can be adopted. The method comprises the following specific steps:
putting the Fe-yttrium nitrate powder briquette at the bottom of the furnace, and then putting ferrochrome, metal chromium, ferroboron, ferroniobium, ferrovanadium and pure iron. The melting temperature is 1580 ℃; after the materials are completely melted, reducing the power of the electric furnace, reducing the temperature of the melt to 1320 ℃, and deoxidizing by using pure aluminum accounting for 0.13 percent of the total amount of the ingredients; the incubation was continued for about 8 minutes. The casting temperature range was 1250 ℃. About 9 minutes after casting, the lost foam mold was opened, at which point the ingot temperature was below 600 ℃ and the cooling rate from the solidification temperature to 600 ℃ was about 70 ℃/min. And air-cooling to room temperature. The integral hardness of the obtained cast ingot reaches HRC69.2, and the impact toughness reaches 12.6J/cm2The bending strength reaches 1690 MPa.
FIG. 4 is a cast alloy structure, mainly including a primary Fe phase and a eutectic phase, wherein the eutectic phase is a eutectic structure of an Fe phase and boron and carbon compounds;
example 16 iron powder and yttrium nitrate powder were uniformly mixed and then molded into a powder compact. The mass ratio of yttrium nitrate powder to iron powder was approximately 1:4, i.e., an Fe-yttrium nitrate mixed compact of Fe-4.64 wt.% Y was formed. Used as a carrier for rare earth Y modification.
High-carbon ferrochrome, micro-carbon ferrochrome, ferroboron, ferroniobium, ferrovanadium, industrial pure iron and the Fe-yttrium nitrate mixed pressing block are selected as raw materials, and the component ranges are as follows: cr: 13.0 wt.%; b: 2.6 wt.%; c:0.8 wt.%; nb:0.6 wt.%; v:0.4 wt.%; 0.60 wt.% Y; the impurity elements are controlled as shown in Table 2. Small amounts of Al, Mn, N, etc. impurities do not cause radical changes in the properties of the alloy and are therefore not listed in Table 2. After weighing corresponding raw materials according to the component requirement, adopting induction melting and lost foam casting, and specifically comprising the following steps:
putting the Fe-yttrium nitrate powder briquette at the bottom of the furnace, and then putting ferrochrome, metal chromium, ferroboron, ferroniobium, ferrovanadium and pure iron. The melting temperature is 1600 ℃; after the materials are completely melted, reducing the power of the electric furnace, reducing the temperature of the melt to 1330 ℃, and deoxidizing by using pure aluminum accounting for 0.12 percent of the total amount of the ingredients; the incubation was continued for about 6 minutes. The casting temperature range was 1270 ℃. About 9 minutes after casting, the lost foam mold was opened, at which point the ingot temperature was below 700 ℃ and the cooling rate from the solidification temperature to 700 ℃ was about 60 ℃/min. And air-cooling to room temperature. The integral hardness of the obtained cast ingot reaches HRC69.6, and the impact toughness reaches 15.0J/cm2The bending strength reaches 1532 MPa.
EXAMPLE 17 iron powder and yttrium carbonate powder were mixed uniformly and then molded into a powder compact. The mass ratio of yttrium carbonate powder to iron powder was approximately 1:3, i.e., an Fe-yttrium carbonate mixed compact of Fe-10.8 wt.% Y was formed. Used as a carrier for rare earth Y modification.
High-carbon ferrochrome, micro-carbon ferrochrome, ferroboron, ferroniobium, ferrovanadium, industrial pure iron and the Fe-yttrium carbonate mixed pressing block are selected as raw materials, and the component ranges are as follows: 10.0 wt.% Cr; 2.9 wt.%; 0.7 wt.% C; 0.4 wt.% Nb; 0.2 wt.% V; 1.6 wt.% Y; the impurity elements are controlled as shown in Table 2. Small amounts of Al, Mn, N, etc. impurities do not cause radical changes in the properties of the alloy and are therefore not listed in Table 2. After weighing the corresponding raw materials according to the required mixture ratio of the components, adopting induction melting and sand mould casting. The method comprises the following specific steps:
putting Fe-yttrium carbonate powder briquettes on the bottom of the furnace, and then putting ferrochrome, metal chromium, ferroboron, ferroniobium, ferrovanadium and pure iron. The melting temperature was 1650 ℃; after the materials are completely melted, reducing the power of the electric furnace, reducing the temperature of the melt to 1360 ℃, and deoxidizing by using pure aluminum accounting for 0.15 percent of the total amount of the ingredients; the incubation was continued for about 10 minutes. The casting temperature range was 1320 ℃. About 6 minutes after casting, the sand mold was opened, at which point the ingot temperature was below 800 ℃ and the cooling rate from the solidification temperature to 800 ℃ was about 70 ℃/min. And air-cooling to room temperature. The integral hardness of the obtained cast ingot reaches HRC68.4, and the impact toughness reaches 12.0J/cm2The bending strength reaches 1412 MPa.
EXAMPLE 18 iron powder and yttrium carbonate powder were mixed uniformly and then molded into a powder compact. The mass ratio of yttrium carbonate powder to iron powder was approximately 1:13, i.e., an Fe-yttrium carbonate mixed compact of Fe-3.09 wt.% Y was formed. Used as a carrier for rare earth Y modification.
Selecting high-carbon ferrochrome, metallic chromium, ferroboron, ferroniobium, industrial pure iron and the Fe-Y2O3The mixed briquettes are taken as raw materials and have the following component ranges: 10.0 wt.% Cr; 2.7 wt.%; 0.7 wt.% C; 0.5 wt.% Nb; y:0.08 wt.%; the impurity elements are controlled as shown in Table 2. Small amounts of Al, Mn, N, etc. impurities do not cause radical changes in the properties of the alloy and are therefore not listed in Table 2. After the corresponding raw materials are weighed according to the component requirement, a vacuum induction furnace can be adopted for smelting and water-cooling iron mold casting. The method comprises the following specific steps:
putting Fe-yttrium carbonate powder briquettes on the bottom of the furnace, and then putting ferrochrome, metal chromium, ferroboron, ferroniobium and pure iron. The melting temperature is 1500 ℃; after the materials are completely melted, reducing the power of the electric furnace, reducing the temperature of the melt to 1320 ℃, and deoxidizing by using pure aluminum accounting for 0.1 percent of the total amount of the ingredients; the incubation was continued for about 5 minutes. The casting temperature range was 1260 ℃. About 10 minutes after casting, the water-cooled iron mold was opened, at which point the ingot temperature was below 600 ℃ and the cooling rate from the solidification temperature to 600 ℃ was about 70 ℃/min. And air-cooling to room temperature. The integral hardness of the obtained cast ingot reaches HRC70.2, and the impact toughness reaches 12.8J/cm2The bending strength reaches 1480 MPa.
EXAMPLE 19 iron powder and yttrium carbonate powder were mixed uniformly and then molded into a powder compact. The mass ratio of yttrium carbonate powder to iron powder was approximately 1:4, i.e., an Fe-yttrium carbonate mixed compact of Fe-8.64 wt.% Y was formed. Used as a carrier for rare earth Y modification.
Selecting high-carbon ferrochrome, micro-carbon ferrochrome, ferroboron, ferroniobium, industrial pure iron and the Fe-Y2O3The mixed briquettes are taken as raw materials and have the following component ranges: cr:10.0 wt.%; b:2.7 wt.%; 0.8 wt.% C; 0.6 wt.% Nb; 0.10 wt.% Y; the impurity elements are controlled as shown in Table 2. Small amounts of Al, Mn, N, etc. impurities do not cause radical changes in the properties of the alloy and are therefore not listed in Table 2. After weighing corresponding raw materials according to the component requirement, adopting induction melting and investment casting, and specifically comprising the following steps:
putting Fe-yttrium carbonate powder briquettes on the bottom of the furnace, and then putting ferrochrome, metal chromium, ferroboron, ferroniobium, ferrovanadium and pure iron. The melting temperature is 1580 ℃; after the materials are completely melted, reducing the power of the electric furnace, reducing the temperature of the melt to 1320 ℃, and deoxidizing by using pure aluminum accounting for 0.12 percent of the total amount of the ingredients; the incubation was continued for about 8 minutes. The casting temperature range was 1280 ℃. And opening the sand mold investment mold about 10 minutes after the casting is finished, wherein the ingot casting temperature is lower than 700 ℃, and the cooling rate from the solidification temperature to 700 ℃ is about 60 ℃/min. And air-cooling to room temperature. The integral hardness of the obtained cast ingot reaches HRC68.0, and the impact toughness reaches 16.0J/cm2The bending strength reaches 1560 MPa.
EXAMPLE 20 iron powder and yttrium carbonate powder were mixed uniformly and then molded into a powder compact. The mass ratio of yttrium carbonate powder to iron powder was approximately 1:5, i.e., an Fe-yttrium carbonate mixed compact of Fe-7.2 wt.% Y was formed. Used as a carrier for rare earth Y modification.
Selecting high-carbon ferrochrome, metal chromium, ferroboron, ferroniobium, ferrovanadium, industrial pure iron and the Fe-Y2O3The mixed briquettes are taken as raw materials and have the following component ranges: cr: 11.0 wt.%; b:2.7 wt.%; 0.7 wt.% C; 0.2 wt.% Nb; 0.4 wt.% V; 0.3 wt.% Y; the impurity elements are controlled as shown in Table 2. Small amount of Al, Mn, N and other impurities will not cause radical change of alloy performance, so they are not listed inIn table 2. After weighing corresponding raw materials according to the component requirement, adopting induction melting and sand mold casting, and specifically comprising the following steps:
putting Fe-yttrium carbonate powder briquettes on the bottom of the furnace, and then putting ferrochrome, metal chromium, ferroboron, ferroniobium, ferrovanadium and pure iron. The melting temperature is 1600 ℃; after the materials are completely melted, reducing the power of the electric furnace, reducing the temperature of the melt to 1340 ℃, and deoxidizing by using pure aluminum accounting for 0.13 percent of the total amount of the ingredients; the incubation was continued for about 9 minutes. The casting temperature range was 1280 ℃. About 7 minutes after casting, the sand mold was opened, at which point the ingot temperature was below 800 ℃ and the cooling rate from the solidification temperature to 800 ℃ was about 60 ℃/min. And air-cooling to room temperature. The integral hardness of the obtained cast ingot reaches HRC67.2, and the impact toughness reaches 12.0J/cm2The bending strength reaches 1620 MPa.
EXAMPLE 21 iron powder and yttrium carbonate powder were mixed uniformly and then molded into a powder compact. The mass ratio of yttrium carbonate powder to iron powder was approximately 1:6, i.e., an Fe-yttrium carbonate mixed compact of Fe-6.17 wt.% Y was formed. Used as a carrier for rare earth Y modification.
High-carbon ferrochrome, micro-carbon ferrochrome, ferroboron, ferroniobium, ferrovanadium, industrial pure iron and the Fe-yttrium carbonate mixed pressing block are selected as raw materials, and the component ranges are as follows: cr:10.0 wt.%; b: 2.6 wt.%; c: 0.6 wt.%; nb: 0.3 wt.%; v: 0.1 wt.%; 0.5 wt.% Y; the impurity elements are controlled as shown in Table 2. Small amounts of Al, Mn, N, etc. impurities do not cause radical changes in the properties of the alloy and are therefore not listed in Table 2. After weighing corresponding raw materials according to the component requirement, adopting induction melting and lost foam casting, and specifically comprising the following steps:
putting Fe-yttrium carbonate powder briquettes on the bottom of the furnace, and then putting ferrochrome, metal chromium, ferroboron, ferroniobium, ferrovanadium and pure iron. The melting temperature is 1600 ℃; after the materials are completely melted, reducing the power of the electric furnace, reducing the temperature of the melt to 1325 ℃, and deoxidizing by using pure aluminum accounting for 0.12 percent of the total amount of the ingredients; the incubation was continued for about 6 minutes. The casting temperature range was 1285 ℃. And opening the lost foam sand mold about 8 minutes after the casting is finished, wherein the ingot casting temperature is lower than 700 ℃, and the cooling rate from the solidification temperature to 700 ℃ is about 70 ℃/min. And air-cooling to room temperature. The integral hardness of the obtained cast ingot reachesHRC70.3, impact toughness up to 14.2J/cm2The bending strength reaches 1432 MPa.
EXAMPLE 22 iron powder and yttrium carbonate powder were mixed uniformly and then molded into a powder compact. The mass ratio of yttrium carbonate powder to iron powder was approximately 1:8, i.e., an Fe-yttrium carbonate mixed compact of Fe-4.8 wt.% Y was formed. Used as a carrier for rare earth Y modification.
Selecting high-carbon ferrochrome, micro-carbon ferrochrome, ferroboron, ferroniobium, industrial pure iron and the Fe-Y2O3The mixed briquettes are taken as raw materials and have the following component ranges: cr:10.0 wt.%; b: 2.6 wt.%; c:0.8 wt.%; nb: 0.8 wt.%; 0.80 wt.% Y; the impurity elements are controlled as shown in Table 2. Small amounts of Al, Mn, N, etc. impurities do not cause radical changes in the properties of the alloy and are therefore not listed in Table 2. After weighing corresponding raw materials according to the component requirement, adopting vacuum induction melting and iron mold casting, and specifically comprising the following steps:
putting Fe-yttrium carbonate powder briquettes on the bottom of the furnace, and then putting ferrochrome, metal chromium, ferroboron, ferroniobium, ferrovanadium and pure iron. The melting temperature is 1590 ℃; after the materials are completely melted, reducing the power of the electric furnace, reducing the temperature of the melt to 1335 ℃, and deoxidizing by using pure aluminum accounting for 0.14 percent of the total amount of the ingredients; the incubation was continued for about 7 minutes. The casting temperature range was 1290 ℃. About 10 minutes after casting, the iron mold was opened, at which point the ingot temperature was below 600 ℃ and the cooling rate from the solidification temperature to 600 ℃ was about 70 ℃/min. And air-cooling to room temperature. The integral hardness of the obtained cast ingot reaches HRC66.9, and the impact toughness reaches 15.2J/cm2The bending strength reaches 1690 MPa.
EXAMPLE 23 iron powder and yttrium carbonate powder were mixed uniformly and then molded into a powder compact. The mass ratio of yttrium carbonate powder to iron powder was approximately 1:10, i.e., an Fe-yttrium carbonate mixed compact of Fe-3.93 wt.% Y was formed. Used as a carrier for rare earth Y modification.
High-carbon ferrochrome, micro-carbon ferrochrome, ferroboron, ferroniobium, ferrovanadium, industrial pure iron and the Fe-yttrium carbonate mixed pressing block are selected as raw materials, and the component ranges are as follows: cr: 11.0 wt.%; b: 2.6 wt.%; c: 0.9 wt.%; nb:0.2 wt.%; v:0.2 wt.%; 1.0 wt.% Y; the impurity elements are controlled as shown in Table 2. Small amounts of Al, Mn, N, etc. impurities do not cause radical changes in the properties of the alloy and are therefore not listed in Table 2. After the corresponding raw materials are weighed according to the component requirement, induction melting and lost foam casting can be adopted. The method comprises the following specific steps:
putting Fe-yttrium carbonate powder briquettes on the bottom of the furnace, and then putting ferrochrome, metal chromium, ferroboron, ferroniobium, ferrovanadium and pure iron. The melting temperature is 1610 ℃; after the materials are completely melted, reducing the power of the electric furnace, reducing the temperature of the melt to 1340 ℃, and deoxidizing by using pure aluminum accounting for 0.13 percent of the total amount of the ingredients; the incubation was continued for about 8 minutes. The casting temperature range was 1270 ℃. About 9 minutes after casting, the lost foam mold was opened, at which point the ingot temperature was below 600 ℃ and the cooling rate from the solidification temperature to 600 ℃ was about 70 ℃/min. And air-cooling to room temperature. The integral hardness of the obtained cast ingot reaches HRC68.0, and the impact toughness reaches 12.8J/cm2The bending strength reaches 1642 MPa.
EXAMPLE 24 iron powder and yttrium carbonate powder were mixed uniformly and then molded into a powder compact. The mass ratio of yttrium carbonate powder to iron powder was approximately 1:7, i.e., an Fe-yttrium carbonate mixed compact of Fe-5.4 wt.% Y was formed. Used as a carrier for rare earth Y modification.
High-carbon ferrochrome, micro-carbon ferrochrome, ferroboron, ferroniobium, ferrovanadium, industrial pure iron and the Fe-yttrium carbonate mixed pressing block are selected as raw materials, and the component ranges are as follows: cr: 13.0 wt.%; b: 2.6 wt.%; c:0.8 wt.%; nb:0.6 wt.%; v:0.4 wt.%; 1.2 wt.% Y; the impurity elements are controlled as shown in Table 2. Small amounts of Al, Mn, N, etc. impurities do not cause radical changes in the properties of the alloy and are therefore not listed in Table 2. After weighing corresponding raw materials according to the component requirement, adopting induction melting and lost foam casting, and specifically comprising the following steps:
putting Fe-yttrium carbonate powder briquettes on the bottom of the furnace, and then putting ferrochrome, metal chromium, ferroboron, ferroniobium, ferrovanadium and pure iron. The melting temperature is 1620 ℃; after the materials are completely melted, reducing the power of the electric furnace, reducing the temperature of the melt to 1350 ℃, and deoxidizing by using pure aluminum accounting for 0.12 percent of the total amount of the ingredients; the incubation was continued for about 6 minutes. The casting temperature range was 1300 ℃. Opening the lost foam sand mold about 9 minutes after the casting, wherein the ingot casting temperature is lower than 700 ℃, and the cooling rate from the solidification temperature to 700 ℃ is about 60DEG C/min. And air-cooling to room temperature. The integral hardness of the obtained cast ingot reaches HRC69.2, and the impact toughness reaches 15.0J/cm2The bending strength reaches 1436 Pa.
FIG. 5 shows a cast alloy structure mainly including an Fe primary crystal phase and a eutectic phase, wherein the eutectic phase is a eutectic structure of an Fe phase and boron and carbon compounds.
The properties of the cast alloys prepared in the examples were measured as follows:
1. hardness tests were conducted on the cast metals of the examples using an HR-150A Rockwell hardness machine with a load of 150Kg, and an average value was taken after five points were hit and is shown in Table 2.
2. The impact toughness of the cast metals of the examples was tested using a JBS-300B impact tester at a range of 150J, and the average value of five samples was taken and is shown in Table 2.
3. Three-point bending tests were conducted on an electronic universal testing machine for example cast metal materials, with sample dimensions of 2X 5X 50mm rectangular test specimens with a span of 30mm, and the average bending strengths of three identically treated samples are listed in Table 2.
TABLE 2 compositions and hardness, impact toughness and flexural strength of the examples
Figure BDA0002060451310000171
Figure BDA0002060451310000181

Claims (5)

1. An yttrium modified high-hardness alloy is characterized in that: the alloy comprises the following elements in percentage by mass: 9.0-13.0, B: 2.6-2.9, C:0.7 to 0.9, Nb: 0.4-0.8, V:0.4 to 0.8, Mn: < 0.3, Y:0.02 to 1.6, S, P: not more than 0.01, and the balance of Fe, wherein C, B comprises the following components in percentage by mass: 3.3 to 3.6; C/Cr mass ratio: 0.06 to 0.08; the total mass percentage of Nb and V is as follows: 0.5 to 1.0; the casting method of the yttrium modified high-hardness alloy comprises the following processes:
(1) preparation of Y element-containing powder compacts
Using iron powder and Y2O3After the powders are mixed evenly, the mixture is molded into powder briquettes Y2O3The mass ratio of the powder to the iron powder is 1: 3-19, and Fe-Y with Fe-3.94-19.71% of Y is formed2O3Mixing and briquetting; or the mass ratio of the yttrium nitrate powder to the iron powder is 1: 4-10 to form a mixed briquette of Fe-2.11-4.64% Y, or the mass ratio of the yttrium carbonate powder to the iron powder is 1: 3-13 to form a mixed briquette of Fe-3.09-10.8% Y;
(2) alloy proportioning, smelting and modification treatment
Weighing corresponding raw materials according to the component requirement proportion of the Fe-Cr-B-C alloy, and then adding 0.02-1.6% of Y element for modification: firstly Fe-Y2O3Putting a Fe-yttrium carbonate or Fe-yttrium nitrate powder briquette at the bottom of a furnace, then putting ferrochrome, metal chromium, ferroboron, ferroniobium, ferrovanadium and pure iron, and smelting by adopting an induction furnace to prepare an alloy, wherein the melting temperature is 1500-1660 ℃; then reducing the power of the electric furnace, reducing the temperature of the melt to 1300-1380 ℃, and deoxidizing by using pure aluminum accounting for 0.1-0.15% of the total amount of the ingredients; keeping the temperature and standing for 5-10 minutes;
(3) casting of
The casting temperature range is 1250-1300 ℃, the designed alloy has deep eutectic composition, can form non-equilibrium matrix structure under the common sand mold casting condition, can be cast and formed by various methods, and the cooling speed from the solidification temperature to 600 ℃ is not lower than 60 ℃/min;
y for yttrium element modified high-hardness alloy2O3Mixing yttrium nitrate or yttrium carbonate powder with iron powder to form powder compact serving as a Y element modification carrier; utilizing Fe in Fe-Cr-B-C alloy high-temperature melt3C、Cr3C2The reduction of the isocarbides forms the active Y element and reacts with C, B to form a structure similar to Y (B, C)6The compound of (2) avoids the appearance of boride net-shaped and needle-shaped structures, promotes the formation of fine eutectic structures, and plays a role in modifying and toughening refined structures; the matrix phase of the ingot casting structure is a non-equilibrium structure strengthened by Cr, B and C with high hardness; the hard phase is a high-hardness boron and carbon compound and forms a fine eutectic structure with the matrix phase; miningBy Y2O3The hardness of the cast ingot as a raw material reaches HRC 66.5-69.6, and the impact toughness reaches 12.5-16.3J/cm2The bending strength reaches 1260-1662 MPa; or yttrium nitrate is used as a raw material, the hardness of the cast ingot reaches HRC 67.0-70.5, and the impact toughness reaches 11.8-15.8J/cm2The bending strength reaches 1360-1690 MPa; or yttrium carbonate is used as a raw material, the hardness of the cast ingot reaches HRC 66.92-70.3, and the impact toughness reaches 12.0-16.0J/cm2The bending strength reaches 1432-1690 MPa.
2. The method of casting an yttrium modified high-hardness alloy according to claim 1, comprising the steps of:
(1) preparation of Y element-containing powder compacts
Using iron powder and Y2O3After the powders are mixed evenly, the mixture is molded into powder briquettes Y2O3The mass ratio of the powder to the iron powder is 1: 3-19, and Fe-Y with Fe-3.94-19.71% of Y is formed2O3Mixing and briquetting; or the mass ratio of the yttrium nitrate powder to the iron powder is 1: 4-10 to form a mixed briquette of Fe-2.11-4.64% Y, or the mass ratio of the yttrium carbonate powder to the iron powder is 1: 3-13 to form a mixed briquette of Fe-3.09-10.8% Y;
(2) alloy proportioning, smelting and modification treatment
Weighing corresponding raw materials according to the component requirement proportion of the Fe-Cr-B-C alloy, and then adding 0.02-1.6% of Y element for modification: firstly Fe-Y2O3Putting a Fe-yttrium carbonate or Fe-yttrium nitrate powder briquette at the bottom of a furnace, then putting ferrochrome, metal chromium, ferroboron, ferroniobium, ferrovanadium and pure iron, and smelting by adopting an induction furnace to prepare an alloy, wherein the melting temperature is 1500-1660 ℃; then reducing the power of the electric furnace, reducing the temperature of the melt to 1300-1380 ℃, and deoxidizing by using pure aluminum accounting for 0.1-0.15% of the total amount of the ingredients; keeping the temperature and standing for 5-10 minutes;
(3) casting of
The casting temperature range is 1250-1300 ℃, the designed alloy has deep eutectic composition, non-equilibrium matrix structure can be formed under the condition of common sand mold casting, casting molding can be carried out by various methods, and the cooling speed from the solidification temperature to 600 ℃ is not lower than 60 ℃/min.
3. The method of casting an yttrium modified high-hardness alloy according to claim 2, wherein: when a large casting is prepared, the constraint of the mold is released again at the temperature of 600-800 ℃.
4. The method of casting an yttrium modified high-hardness alloy according to claim 2, wherein: the iron powder in the step (1) is reduced iron powder with the purity of more than or equal to 98.5 percent and the granularity of 100 meshes or water atomized iron powder with the purity of more than or equal to 99.0 percent and the granularity of 100 meshes or alloy iron powder with the granularity of 100 meshes.
5. The method of casting an yttrium modified high-hardness alloy according to claim 2, wherein: and (2) the pressing pressure of the die pressing in the step (1) is 100-600 MPa.
CN201910403269.7A 2018-06-08 2019-05-15 Yttrium modified high-hardness alloy and casting method thereof Active CN109972051B (en)

Applications Claiming Priority (6)

Application Number Priority Date Filing Date Title
CN201810587830.7A CN108570609A (en) 2018-06-08 2018-06-08 A kind of yttrium nitrate goes bad toughening high hardness alloy and its casting method
CN2018105890239 2018-06-08
CN201810589023.9A CN108707836A (en) 2018-06-08 2018-06-08 A kind of yttrium carbonate goes bad toughening high hardness alloy and its casting method
CN2018105890489 2018-06-08
CN2018105878307 2018-06-08
CN201810589048.9A CN108707837A (en) 2018-06-08 2018-06-08 A kind of rare-earth yttrium goes bad toughening high hardness alloy and its casting method

Publications (2)

Publication Number Publication Date
CN109972051A CN109972051A (en) 2019-07-05
CN109972051B true CN109972051B (en) 2022-01-28

Family

ID=67073617

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201910403269.7A Active CN109972051B (en) 2018-06-08 2019-05-15 Yttrium modified high-hardness alloy and casting method thereof

Country Status (1)

Country Link
CN (1) CN109972051B (en)

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0505732A1 (en) * 1991-02-22 1992-09-30 Sumitomo Metal Industries, Ltd. Low-alloy heat-resistant steel having improved creep strength and toughness
CN101831590A (en) * 2009-03-10 2010-09-15 江苏东冶轧辊有限公司 High-boron low-alloy high-speed steel roll and preparation method thereof
CN102251184A (en) * 2011-07-12 2011-11-23 北京工业大学 Fe-Cr-B antifriction alloy containing aluminum and preparation method thereof
EP2789700A1 (en) * 2013-04-08 2014-10-15 DALMINE S.p.A. Heavy wall quenched and tempered seamless steel pipes and related method for manufacturing said steel pipes
CN105256270A (en) * 2015-11-18 2016-01-20 苏州热工研究院有限公司 Preparing method for Fe-Cr-B system amorphous coating with high Cr content and high B content
CN105695884A (en) * 2016-03-22 2016-06-22 湖南省冶金材料研究院 High-hardness, wear-resistant and corrosion-resistant alloy of amorphous/nanocrystal matrix and preparation method of high-hardness, wear-resistant and corrosion-resistant alloy
CN105821312A (en) * 2016-03-23 2016-08-03 北京科技大学 Lining plate for low-carbon and medium-alloy wet ball mill and preparation method thereof
CN106834927A (en) * 2017-01-25 2017-06-13 北京工业大学 Abrasion-proof duplex metal composite hammer head and preparation method thereof
JP2017193752A (en) * 2016-04-20 2017-10-26 新日鐵住金株式会社 High carbon steel sheet excellent in abrasion resistance after heat treatment and manufacturing method therefor

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100611113B1 (en) * 2004-06-04 2006-08-14 김강형 wear-resistant cutting, and bending tools
CN101284306B (en) * 2008-04-29 2010-06-02 沈阳铸造研究所 High boron steel neutron absorbing material preparation method
CN101550518A (en) * 2009-05-11 2009-10-07 西安国丰机械制造有限责任公司 Boron-containing multi-element low alloy wear resistant cast steel and preparing method thereof
SI3119918T1 (en) * 2014-03-18 2023-07-31 Innomaq 21, Sociedad Limitada Extremely high conductivity low cost steel

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0505732A1 (en) * 1991-02-22 1992-09-30 Sumitomo Metal Industries, Ltd. Low-alloy heat-resistant steel having improved creep strength and toughness
CN101831590A (en) * 2009-03-10 2010-09-15 江苏东冶轧辊有限公司 High-boron low-alloy high-speed steel roll and preparation method thereof
CN102251184A (en) * 2011-07-12 2011-11-23 北京工业大学 Fe-Cr-B antifriction alloy containing aluminum and preparation method thereof
EP2789700A1 (en) * 2013-04-08 2014-10-15 DALMINE S.p.A. Heavy wall quenched and tempered seamless steel pipes and related method for manufacturing said steel pipes
CN105256270A (en) * 2015-11-18 2016-01-20 苏州热工研究院有限公司 Preparing method for Fe-Cr-B system amorphous coating with high Cr content and high B content
CN105695884A (en) * 2016-03-22 2016-06-22 湖南省冶金材料研究院 High-hardness, wear-resistant and corrosion-resistant alloy of amorphous/nanocrystal matrix and preparation method of high-hardness, wear-resistant and corrosion-resistant alloy
CN105821312A (en) * 2016-03-23 2016-08-03 北京科技大学 Lining plate for low-carbon and medium-alloy wet ball mill and preparation method thereof
JP2017193752A (en) * 2016-04-20 2017-10-26 新日鐵住金株式会社 High carbon steel sheet excellent in abrasion resistance after heat treatment and manufacturing method therefor
CN106834927A (en) * 2017-01-25 2017-06-13 北京工业大学 Abrasion-proof duplex metal composite hammer head and preparation method thereof

Also Published As

Publication number Publication date
CN109972051A (en) 2019-07-05

Similar Documents

Publication Publication Date Title
CN109972051B (en) Yttrium modified high-hardness alloy and casting method thereof
CN109972056B (en) Cerium modified wear-resistant alloy and casting method thereof
CN110016624B (en) Lanthanum modified high-hardness alloy and casting method thereof
CN109972050B (en) Yttrium toughened wear-resistant alloy and casting and heat treatment method thereof
CN115261713A (en) Preparation method of high-hardness high-toughness wear-resistant high-chromium cast iron
CN110029282B (en) Tungsten element segregation toughened alloy and casting and heat treatment method thereof
CN108425072A (en) A kind of Rare Earth Lanthanum toughening high hard alloy and its casting and heat treatment method
CN108396249A (en) A kind of lanthanum carbonate toughening high hard alloy and its casting and heat treatment method
CN108707835A (en) A kind of rare-earth yttrium toughening high hard alloy and its casting and heat treatment method
CN109988976B (en) Al toughened high-hardness alloy and casting and heat treatment method thereof
CN108707838A (en) A kind of lanthanum nitrate goes bad toughening high hardness alloy and its casting method
CN108570609A (en) A kind of yttrium nitrate goes bad toughening high hardness alloy and its casting method
CN108570612A (en) A kind of Rare Earth Lanthanum goes bad toughening high hardness alloy and its casting method
CN108707837A (en) A kind of rare-earth yttrium goes bad toughening high hardness alloy and its casting method
CN108570624A (en) A kind of cerium goes bad toughening high hardness alloy and its casting method
CN108707836A (en) A kind of yttrium carbonate goes bad toughening high hardness alloy and its casting method
CN109972057A (en) A kind of strontium element toughening high hardness alloy and its casting method
US20240052462A1 (en) Primary Carbide Refinement In Hypereutectic High Chromium Cast Irons
CN108660391A (en) A kind of strontium nitrate goes bad toughening high hardness alloy and its casting method
CN108677104A (en) A kind of rare earth bait goes bad toughening high hardness alloy and its casting method
CN108570623A (en) A kind of rare earth strontium goes bad toughening high hardness alloy and its casting method
CN110004378A (en) A kind of bait goes bad toughening high hardness alloy and its casting method
CN108441776A (en) A kind of erbium nitrate goes bad toughening high hardness alloy and its casting method
CN108570611A (en) A kind of cerous nitrate goes bad toughening high hardness alloy and its casting method
CN108570622A (en) A kind of carbonic acid erbium goes bad toughening high hardness alloy and its casting method

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
GR01 Patent grant
GR01 Patent grant