CN110408884B - Nitrogen-rich manganese-based material and preparation method thereof - Google Patents
Nitrogen-rich manganese-based material and preparation method thereof Download PDFInfo
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- CN110408884B CN110408884B CN201910814051.0A CN201910814051A CN110408884B CN 110408884 B CN110408884 B CN 110408884B CN 201910814051 A CN201910814051 A CN 201910814051A CN 110408884 B CN110408884 B CN 110408884B
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- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
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- C22C22/00—Alloys based on manganese
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- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
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- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C8/00—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
- C23C8/06—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using gases
- C23C8/08—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using gases only one element being applied
- C23C8/24—Nitriding
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Abstract
The invention relates to the technical field of materials, in particular to a nitrogen-rich manganese-based material and a preparation method thereof, wherein the nitrogen-rich manganese-based material comprises the following chemical components in percentage by mass: the preparation method comprises the following steps of: a. crushing the manganese base material, and grinding into fine powder with a certain granularity; b. pressing the fine powder obtained in the step a into balls; c. feeding the spherical manganese base material into a heating nitriding furnace; d. the spherical manganese base material is nitrided in a heating nitriding furnace. The preparation method of the nitrogen-rich manganese-based material has high nitriding efficiency, the yield of the manganese-based base material N is high, the N can improve the tensile strength and the yield strength of the material, the strength of the manganese-based base material is obviously improved, the N is a cheap alloying element, the preparation cost is low, and the nitrogen-rich manganese-based material has good technical and economic indexes and comprehensive economic benefits.
Description
Technical Field
The invention relates to the technical field of materials, in particular to a nitrogen-rich manganese-based material and a preparation method thereof.
Background
Manganese-based materials, which are made of Mn, C, MnO, Fe, etc., are increasingly used in industry as an alloy, but there are places where the strength requirement for the material is high, and the current manganese-based materials cannot meet the strength requirement and cannot be used, thereby affecting the use of manganese-based materials.
Disclosure of Invention
The invention aims to provide a nitrogen-rich manganese-based material with high strength.
The technical scheme adopted by the invention for solving the technical problems is as follows: a nitrogen-rich manganese-based material comprises the following chemical components in percentage by mass: 40-60% of Mn, 10-20% of C, 4-8% of MnO, 15-25% of N and the balance of Fe.
In addition, the invention also aims to solve the technical problem of providing a preparation method of the nitrogen-rich manganese-based material with high strength.
The preparation method for the nitrogen-rich manganese-based material comprises the following steps:
a. crushing the manganese base material, and grinding into fine powder with a certain granularity;
b. pressing the fine powder obtained in the step a into balls;
c. feeding the spherical manganese base material into a heating nitriding furnace;
d. the spherical manganese base material is nitrided in a heating nitriding furnace, the spherical manganese base material is heated to 950-.
Further, in the step a, the manganese base material comprises the following chemical components in percentage by mass: 55-65% of Mn, 15-25% of C, 5-10% of MnO and the balance of Fe.
Further, in the step a, the size fraction of the fine powder is less than or equal to 200 meshes, and the size fraction less than 250 meshes is not less than 80% of the total.
Further, in the step b, the adhesive and the water are added in the process of pressing the fine powder into the spherical manganese base material, and the spherical manganese base material is aired after being pelletized, so that the water content in the spherical manganese base material is less than or equal to 0.5 percent.
Further, the adhesive is bentonite.
Further, in the step b, the cross-sectional diameter of the manganese base material pressed into a pellet shape is between 10 and 15 mm.
Further, the heating nitriding furnace includes the furnace body, the base, charge the crucible, a housing, heating resistor all sets up in the furnace body, the setting can be dismantled on the base to the casing, the space that casing and base formed is the reacting chamber, charge the crucible and be located the reacting chamber, heating resistor is located around the casing, the bottom of furnace body is provided with nitrogen gas and advances the pipe, the exit end that nitrogen gas advances the pipe is located the reacting chamber, the top of furnace body is provided with the nitrogen gas exit tube.
Furthermore, the heating nitriding furnace also comprises a thermocouple, and the thermocouple is arranged in the furnace body.
The invention has the beneficial effects that: the nitrogen-rich manganese-based material contains 15-25% of N, the N can improve the tensile strength and yield strength of the material and remarkably increase the strength of the manganese-based base material, and the N is a cheap alloying element, has low preparation cost and better technical and economic indexes and comprehensive economic benefits. Meanwhile, the preparation method of the nitrogen-rich manganese-based material provided by the invention comprises the steps of firstly crushing the manganese base material, then grinding the crushed manganese base material into fine powder with a certain granularity, then pressing the fine powder into a spherical shape, finally sending the spherical manganese base material into a heating nitriding furnace for nitriding, heating the spherical manganese base material to 960 ℃, then preserving the heat for 310min, finally cooling to room temperature, and keeping the whole nitriding process in a nitrogen atmosphere, thereby obtaining the nitrogen-rich manganese-based material; the preparation method of the nitrogen-rich manganese-based material has high nitriding efficiency, the yield of the manganese-based base material N is high, and the obtained nitrogen-rich manganese-based material has stable performance and is beneficial to popularization.
Drawings
FIG. 1 is a schematic view of a heating nitriding furnace;
the labels in the figure are: furnace body 1, charging crucible 2, casing 3, heating resistor 4, nitrogen advance pipe 5, nitrogen exit tube 6, thermocouple 7, base 8.
Detailed Description
The invention will be further explained with reference to the drawings.
The invention relates to a nitrogen-rich manganese-based material which comprises the following chemical components in percentage by mass: 40-60% of Mn, 10-20% of C, 4-8% of MnO, 15-25% of N, and the balance of Fe, Mn refers to element manganese, MnO refers to compound, melting point: 1205-1260 ℃.
N can improve the tensile strength and the yield strength of the material, and obviously increase the strength of the manganese-based base material, and through research and analysis on the nitrogen-rich manganese-based material, compared with the manganese-based base material, the nitrogen-rich manganese-based material after nitridation can increase the tensile strength and the yield strength of about 122MPa in every 1 percent, and has good strength enhancement effect.
The preparation method of the nitrogen-rich manganese-based material comprises the following steps:
a. crushing the manganese base material, and grinding into fine powder with a certain granularity;
b. pressing the fine powder obtained in the step a into balls;
c. feeding the spherical manganese base material into a heating nitriding furnace;
d. the spherical manganese base material is nitrided in a heating nitriding furnace, the spherical manganese base material is firstly heated to 950-.
In the step a, the manganese base material comprises the following chemical components in percentage by mass: 55-65% of Mn, 15-25% of C, 5-10% of MNO and the balance of Fe. After the manganese base material is crushed, the manganese base material is ground into fine powder with a certain granularity, the granularity of the fine powder is preferably less than or equal to 200 meshes, and the granularity less than 250 meshes is not less than 80 percent of the total number.
The spherical manganese base material can be conveniently sent into the heating nitriding furnace for nitriding, nitrogen can flow in the heating nitriding furnace, nitriding of the manganese base material is facilitated, N can enter the manganese base material conveniently, and the section diameter of the spherical manganese base material is preferably 10-15 mm. A large number of experiments and practices prove that the manganese base material is crushed and then ground into fine powder with a certain particle size, and then the fine powder is pressed into balls, so that the nitriding effect and the nitriding efficiency of the manganese base material can be improved. In order to facilitate the pressing of the fine powder into the spherical manganese base material, in the step b, the adhesive and the water are added in the process of pressing the fine powder into the spherical manganese base material, the spherical manganese base material is aired after balling, so that the water content in the spherical manganese base material is less than or equal to 0.5 percent, the adhesive can adopt bentonite, the amount of the added adhesive is 2 to 5 percent of the total weight, the amount of the added water is 2 to 4 percent of the total weight during pressing, and the pressing pressure is not more than 30 KN.
The spherical manganese base material is nitrided in a heating nitriding furnace, and the preferable structure of the heating nitriding furnace is as follows: as shown in fig. 1, the heating nitriding furnace includes furnace body 1, base 8, charge crucible 2, casing 3, heating resistor 4 all sets up in furnace body 1, casing 3 can dismantle the setting on base 8, the space that casing 3 and base 8 formed is the reacting chamber, charge crucible 2 is located the reacting chamber, heating resistor 4 is located around casing 3, the bottom of furnace body 1 is provided with nitrogen gas and advances pipe 5, the exit end that nitrogen gas advances pipe 5 is located the reacting chamber, the top of furnace body 1 is provided with nitrogen gas exit tube 6. When the heating nitriding furnace is used for nitriding the spherical manganese base material, firstly, the spherical manganese base material is sent into a reaction chamber, nitrogen with positive pressure enters the reaction chamber from a nitrogen inlet pipe 5, so that the reaction chamber is filled with the nitrogen, then a heating resistor 4 works, the spherical manganese base material is heated to 950 plus materials at 960 ℃, the heating rate is less than or equal to 10 ℃/min, the temperature is kept for 300 plus materials for 310min and then is cooled to room temperature, so that the nitriding process is completed, and the residual nitrogen is discharged from a nitrogen outlet pipe 6. Through detection, the heating nitriding furnace has high nitriding efficiency, and the nitrogen yield can be stably controlled between 60 and 80 percent. In order to facilitate accurate temperature control, the thermal nitriding furnace is also provided with a thermocouple 7, the thermocouple 7 is arranged in the furnace body 1, and the thermocouple 7 is used for measuring the temperature of the manganese base material, so that the nitriding effect of the manganese base material is ensured.
In conclusion, the nitrogen-rich manganese-based material preparation method disclosed by the invention is high in nitridation efficiency, high in yield of the manganese-based base material N, stable in performance and beneficial to popularization.
Example 1
The preparation method of the nitrogen-rich manganese-based material comprises the following steps:
a. after the manganese base material is crushed, grinding the manganese base material into fine powder with the grain size of not more than 200 meshes and the grain size of less than 250 meshes of not less than 80 percent of the total number, wherein the manganese base material comprises the following chemical components in percentage by mass: the Mn content is 64%, the C content is 16%, the MnO content is 8%, and the balance is Fe;
b. pressing the fine powder obtained in the step a into spheres, adding bentonite and water during pressing, and airing after the spheres are formed, so that the water content in the spherical manganese base material is less than or equal to 0.5 percent, and the section diameter of the spherical manganese base material is 12 mm;
c. feeding the spherical manganese base material into a heating nitriding furnace;
d. the spherical manganese base material is nitrided in a heating nitriding furnace, the spherical manganese base material is heated to 950 ℃, then is kept for 300min, and is finally cooled to room temperature, the whole nitriding process is under the nitrogen atmosphere, the pressure of the entering nitrogen is 0.15MPa, and the flow is 3 ml/s.
Detecting the obtained nitrogen-rich manganese-based material, wherein the nitrogen-rich manganese-based material comprises the following chemical components in percentage by mass: 59% of Mn, 13.67% of C, 6.56% of MnO, 15% of N and the balance of Fe.
Example 2
The preparation method of the nitrogen-rich manganese-based material comprises the following steps:
a. after the manganese base material is crushed, grinding the manganese base material into fine powder with the grain size of not more than 200 meshes and the grain size of less than 250 meshes of not less than 80 percent of the total number, wherein the manganese base material comprises the following chemical components in percentage by mass: 60% of Mn, 19% of C, 7% of MnO and the balance of Fe;
b. pressing the fine powder obtained in the step a into spheres, adding bentonite and water during pressing, and airing after the spheres are formed, so that the water content in the spherical manganese base material is less than or equal to 0.5 percent, and the section diameter of the spherical manganese base material is 15 mm;
c. feeding the spherical manganese base material into a heating nitriding furnace;
d. the spherical manganese base material is nitrided in a heating nitriding furnace, the spherical manganese base material is heated to 960 ℃, then is subjected to heat preservation for 310min, and is finally cooled to room temperature, the whole nitriding process is in a nitrogen atmosphere, the pressure of entering nitrogen is 0.18MPa, and the flow is 4 ml/s.
Detecting the obtained nitrogen-rich manganese-based material, wherein the nitrogen-rich manganese-based material comprises the following chemical components in percentage by mass: 54.56 percent of Mn, 16.28 percent of C, 6.38 percent of MnO, 19 percent of N and the balance of Fe.
Example 3
The preparation method of the nitrogen-rich manganese-based material comprises the following steps:
a. after the manganese base material is crushed, grinding the manganese base material into fine powder with the grain size of not more than 200 meshes and the grain size of less than 250 meshes of not less than 80 percent of the total number, wherein the manganese base material comprises the following chemical components in percentage by mass: 57% of Mn, 24% of C, 5% of MnO and the balance of Fe;
b. pressing the fine powder obtained in the step a into spheres, adding bentonite and water during pressing, and airing after the spheres are formed, so that the water content in the spherical manganese base material is less than or equal to 0.5 percent, and the section diameter of the spherical manganese base material is 13 mm;
c. feeding the spherical manganese base material into a heating nitriding furnace;
d. the spherical manganese base material is nitrided in a heating nitriding furnace, the spherical manganese base material is heated to 954 ℃ firstly, then the temperature is kept for 305min, finally the temperature is reduced to room temperature, the whole nitriding process is in a nitrogen atmosphere, the pressure of entering nitrogen is 0.2MPa, and the flow is 4 ml/s.
Detecting the obtained nitrogen-rich manganese-based material, wherein the nitrogen-rich manganese-based material comprises the following chemical components in percentage by mass: 50.78% of Mn, 18.86% of C, 4.03% of MnO, 21% of N and the balance of Fe.
Claims (6)
1. The preparation method of the nitrogen-rich manganese-based material is characterized by comprising the following steps: the nitrogen-rich manganese-based material comprises the following chemical components in percentage by mass: 40-60% of Mn, 10-20% of C, 4-8% of MnO, 15-25% of N and the balance of Fe, comprising the following steps:
a. crushing the manganese base material, and grinding the crushed manganese base material into fine powder with a certain granularity, wherein the manganese base material comprises the following chemical components in percentage by mass: 55-65% of Mn, 15-25% of C, 5-10% of MnO and the balance of Fe;
b. pressing the fine powder obtained in the step a into balls;
c. spherical manganese base materials are sent into a heating nitriding furnace, the heating nitriding furnace comprises a furnace body (1), a base (8), a charging crucible (2), a shell (3) and a heating resistor (4), the base (8), the charging crucible (2), the shell (3) and the heating resistor (4) are all arranged in the furnace body (1), the shell (3) is detachably arranged on the base (8), a space formed by the shell (3) and the base (8) is a reaction chamber, the charging crucible (2) is positioned in the reaction chamber, the heating resistor (4) is positioned around the shell (3), a nitrogen inlet pipe (5) is arranged at the bottom of the furnace body (1), the outlet end of the nitrogen inlet pipe (5) is positioned in the reaction chamber, and a nitrogen outlet pipe (6) is arranged at the top of the furnace body (1);
d. the spherical manganese base material is nitrided in a heating nitriding furnace, the spherical manganese base material is heated to 950-.
2. The method of preparing a nitrogen-rich manganese-based material of claim 1, wherein: in the step a, the size fraction of the fine powder is less than or equal to 200 meshes, and the size fraction less than 250 meshes is not less than 80% of the total number.
3. The method of preparing a nitrogen-rich manganese-based material of claim 1, wherein: in the step b, the adhesive and the water are added in the process of pressing the fine powder into the spherical manganese base material, and the spherical manganese base material is aired after balling, so that the water content in the spherical manganese base material is less than or equal to 0.5 percent.
4. The method of preparing a nitrogen-rich manganese-based material of claim 3, wherein: the adhesive is bentonite.
5. The method of preparing a nitrogen-rich manganese-based material of claim 1, wherein: in step b, the cross-sectional diameter of the manganese base material pressed into pellets is between 10 and 15 mm.
6. The method of preparing a nitrogen-rich manganese-based material of claim 1, wherein: the heating nitriding furnace also comprises a thermocouple (7), and the thermocouple (7) is arranged in the furnace body (1).
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| JP2000114013A (en) * | 1998-09-30 | 2000-04-21 | Tdk Corp | Magnetic material and its manufacture |
| CN1876870A (en) * | 2006-06-27 | 2006-12-13 | 四川川投峨眉铁合金（集团）有限责任公司 | Silicon manganese nitride alloy and smelting method thereof |
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