CN111057938A - Processing technology of heat-resistant, wear-resistant and corrosion-resistant high-chromium heat-resistant alloy - Google Patents
Processing technology of heat-resistant, wear-resistant and corrosion-resistant high-chromium heat-resistant alloy Download PDFInfo
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- CN111057938A CN111057938A CN201911421158.5A CN201911421158A CN111057938A CN 111057938 A CN111057938 A CN 111057938A CN 201911421158 A CN201911421158 A CN 201911421158A CN 111057938 A CN111057938 A CN 111057938A
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- 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
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/22—Moulds for peculiarly-shaped castings
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C7/00—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00
- C21C7/04—Removing impurities by adding a treating agent
- C21C7/06—Deoxidising, e.g. killing
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C7/00—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00
- C21C7/10—Handling in a vacuum
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D6/00—Heat treatment of ferrous alloys
- C21D6/002—Heat treatment of ferrous alloys containing Cr
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D6/00—Heat treatment of ferrous alloys
- C21D6/008—Heat treatment of ferrous alloys containing Si
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- 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
- C22C38/34—Ferrous alloys, e.g. steel alloys containing chromium with more than 1.5% by weight of silicon
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- 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
- C22C38/36—Ferrous alloys, e.g. steel alloys containing chromium with more than 1.7% by weight of carbon
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
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- Organic Chemistry (AREA)
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- Crystallography & Structural Chemistry (AREA)
- Manufacture And Refinement Of Metals (AREA)
Abstract
The invention discloses a processing technology of heat-resistant, wear-resistant and corrosion-resistant high-chromium heat-resistant alloy, which comprises the following steps: the method comprises the following steps: detecting raw materials, selecting 1.6-2.4% of carbon, 1.5-2.2% of silicon and 1.5-1.8% of chromium according to mass percentage; step two: smelting raw materials by using an induction furnace; step three: analyzing the smelted material by using a spectrum analyzer; step four: deoxidizing the analyzed material; step five: removing the residue in the deoxidized material; step six: pouring after discharging; step seven: opening the box, removing sand, and taking out the product; step eight: detecting the appearance and the size of the product; step nine: carrying out heat treatment on the product; step ten: and detecting the physical properties of the product. The finished product obtained by the processing technology provided by the invention is wear-resistant and corrosion-resistant, and has good quality and long service life.
Description
Technical Field
The invention relates to a metal smelting process, in particular to a processing process of a heat-resistant, wear-resistant and corrosion-resistant high-chromium heat-resistant alloy.
Background
In the related prior art, the smelting process of high-chromium metal is complex and has higher cost. Meanwhile, various resistances of the obtained metal finished products are not good, and the processing requirements cannot be met.
Disclosure of Invention
The processing technology of the heat-resistant, wear-resistant and corrosion-resistant high-chromium heat-resistant alloy provided by the embodiment of the invention comprises the following steps:
the method comprises the following steps: detecting raw materials, selecting 1.6-2.4% of carbon, 1.5-2.2% of silicon and 1.5-1.8% of chromium according to mass percentage;
step two: smelting raw materials by using an induction furnace;
step three: analyzing the smelted material by using a spectrum analyzer;
step four: deoxidizing the analyzed material;
step five: removing the residue in the deoxidized material;
step six: pouring after discharging;
step seven: opening the box, removing sand, and taking out the product;
step eight: detecting the appearance and the size of the product;
step nine: carrying out heat treatment on the product;
step ten: and detecting the physical properties of the product.
The finished product obtained by the processing technology provided by the invention is wear-resistant and corrosion-resistant, and has good quality and long service life.
Further, in the first step, the mass percent of manganese in the raw materials is less than 1%, the mass percent of phosphorus is less than 0.1%, and the mass percent of sulfur is less than 0.05.
Further, the induction furnace used in the second step is a medium frequency induction furnace.
Further, the deoxidation process in the fourth step specifically comprises the following steps: pretreatment of molten iron, 120t of converter, LF ladle refining, vacuum treatment and soft blowing.
Further, the casting process in the sixth step adopts a smokeless casting process, and comprises the following steps:
preparing a sand core: firstly, mixing a sand core raw material with a binder to prepare a sand core;
selecting a casting mould with a blind riser structure, preheating the casting mould for the first time, putting a sand core into the casting mould so as to form the inner surface of a casting, and preheating the casting mould for the second time within 30min before casting;
installing a filter layer at an air outlet of the riser, pouring through a pouring gate of a casting mold after the installation is finished, wherein the pouring temperature is 1300-1430 ℃, and closing the riser after the pouring is finished;
and (3) carrying out water cooling on the poured mould, opening the mould, taking out the casting, grinding to remove redundant or surplus metal generated in the casting process, and polishing the surface of the casting.
And further, the casting waste after pouring in the sixth step is returned to the furnace for processing again.
Further, the step ten includes: ultrasonic flaw detection, magnetic particle flaw detection or penetration flaw detection, hardness detection, impact value detection and metallographic detection.
Additional aspects and advantages of embodiments of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
fig. 1 is a schematic flow chart of a processing process of the heat-resistant, wear-resistant and corrosion-resistant high-chromium heat-resistant alloy according to the embodiment of the invention.
Detailed Description
The following disclosure provides many different embodiments or examples for implementing different features of the invention. To simplify the disclosure of the present invention, the components and arrangements of specific examples are described below. Of course, they are merely examples and are not intended to limit the present invention. Furthermore, the present invention may repeat reference numerals and/or letters in the various examples, such repetition is for the purpose of simplicity and clarity and does not in itself dictate a relationship between the various embodiments and/or configurations discussed. In addition, the present invention provides examples of various specific processes and materials, but one of ordinary skill in the art may recognize applications of other processes and/or uses of other materials.
Referring to fig. 1, a process for processing a high-chromium heat-resistant alloy with heat resistance, wear resistance and corrosion resistance according to an embodiment of the present invention includes the following steps:
the method comprises the following steps: detecting raw materials, selecting 1.6-2.4% of carbon, 1.5-2.2% of silicon and 1.5-1.8% of chromium according to mass percentage;
step two: smelting raw materials by using an induction furnace;
step three: analyzing the smelted material by using a spectrum analyzer;
step four: deoxidizing the analyzed material;
step five: removing the residue in the deoxidized material;
step six: pouring after discharging;
step seven: opening the box, removing sand, and taking out the product;
step eight: detecting the appearance and the size of the product;
step nine: carrying out heat treatment on the product;
step ten: and detecting the physical properties of the product.
The finished product obtained by the processing technology provided by the invention is wear-resistant and corrosion-resistant, and has good quality and long service life.
Further, in the first step, the mass percent of manganese in the raw materials is less than 1%, the mass percent of phosphorus is less than 0.1%, and the mass percent of sulfur is less than 0.05. Therefore, the influence on the performance of the casting caused by overhigh impurity content is avoided.
Further, the induction furnace used in the second step is a medium frequency induction furnace. Specifically, the medium-frequency induction furnace has the characteristics of high melting efficiency, good electricity-saving effect, uniform metal components, less burning loss, high temperature rise, easy temperature control and the like, and is suitable for various metal melting occasions. In addition, the medium-frequency induction furnace has comprehensive protection measures, has the protection of overcurrent, overvoltage, current limitation, voltage limitation, water shortage, phase shortage and the like, and ensures that the equipment runs reliably on the premise of ensuring the smelting speed.
Further, the deoxidation process in the fourth step specifically comprises the following steps: pretreatment of molten iron, 120t of converter, LF ladle refining, vacuum treatment and soft blowing. Specifically, in the prior art, a deoxidizer, such as calcium carbide powder, carbon powder, and silicon iron powder, is generally added. The deoxidation of the molten steel refining process of the LF furnace is one of the main tasks of molten steel refining, in a certain period of time, the deoxidation lag of molten steel and top slag can bring a series of adverse effects on the quality of molten steel and the smooth operation of production, for example, the deoxidation lag of the molten steel can generate more inclusions, the deoxidation lag of the top slag has weak adsorption capacity on the inclusions in the molten steel, a large amount of inclusions are remained in the molten steel, more and more inclusions are bonded at a water gap of a continuous casting tundish, the water gap is blocked, the production is interrupted, and a series of production costs are increased, the original deoxidation technology achieves the deoxidation purpose by increasing the adding amount of aluminum iron and a deoxidizer, however, for the slag discharging or over-blowing furnace frequency of converter tapping, the deoxidation effect is not obvious, the adding amount of the deoxidizer is too much and is not dispersed in time, the local deoxidation is strong, slag turning or steel turning is caused, and hidden troubles are brought to the safe use, the water gap of the tundish is blocked due to the deoxidation lag, the components are ultra-specially adopted, and the cost is increased sharply.
In the vacuum deoxidation technology, the product of the deoxidation reaction of carbon is gas, and the gas can escape from molten steel without leaving impurities in the steel, thereby not only finishing the deoxidation operation, but also ensuring the quality of finished products of castings.
Further, the casting process in the sixth step adopts a smokeless casting process, and comprises the following steps:
preparing a sand core: firstly, mixing a sand core raw material with a binder to prepare a sand core;
selecting a casting mould with a blind riser structure, preheating the casting mould for the first time, putting a sand core into the casting mould so as to form the inner surface of a casting, and preheating the casting mould for the second time within 30min before casting;
installing a filter layer at an air outlet of the riser, pouring through a pouring gate of a casting mold after the installation is finished, wherein the pouring temperature is 1300-1430 ℃, and closing the riser after the pouring is finished;
and (3) carrying out water cooling on the poured mould, opening the mould, taking out the casting, grinding to remove redundant or surplus metal generated in the casting process, and polishing the surface of the casting.
The smokeless casting process reduces the damage of waste gas and the like to human health in the casting process and improves the safety of operation.
And further, the casting waste after pouring in the sixth step is returned to the furnace for processing again.
Further, the step ten includes: ultrasonic flaw detection, magnetic particle flaw detection or penetration flaw detection, hardness detection, impact value detection and metallographic detection. Therefore, the defect of the processed product is avoided, and subsequent processing is not influenced.
While embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.
Claims (7)
1. The processing technology of the heat-resistant, wear-resistant and corrosion-resistant high-chromium heat-resistant alloy is characterized by comprising the following steps of:
the method comprises the following steps: detecting raw materials, selecting 1.6-2.4% of carbon, 1.5-2.2% of silicon and 1.5-1.8% of chromium according to mass percentage;
step two: smelting raw materials by using an induction furnace;
step three: analyzing the smelted material by using a spectrum analyzer;
step four: deoxidizing the analyzed material;
step five: removing the residue in the deoxidized material;
step six: pouring after discharging;
step seven: opening the box, removing sand, and taking out the product;
step eight: detecting the appearance and the size of the product;
step nine: carrying out heat treatment on the product;
step ten: and detecting the physical properties of the product.
2. The process for preparing a heat, wear and corrosion resistant high-chromium heat resistant alloy as claimed in claim 1, wherein in step one, the raw materials include manganese less than 1 wt%, phosphorus less than 0.1 wt%, and sulfur less than 0.05 wt%.
3. The process according to claim 1, wherein the induction furnace used in the second step is a medium frequency induction furnace.
4. The processing technology of the heat-resistant, wear-resistant and corrosion-resistant high-chromium heat-resistant alloy according to claim 1, wherein the deoxidation technology in the fourth step is specifically as follows: pretreatment of molten iron, 120t of converter, LF ladle refining, vacuum treatment and soft blowing.
5. The process for processing the heat-resistant, wear-resistant and corrosion-resistant high-chromium heat-resistant alloy according to claim 1, wherein the casting process in the sixth step is a smokeless casting process, and comprises the following steps:
preparing a sand core: firstly, mixing a sand core raw material with a binder to prepare a sand core;
selecting a casting mould with a blind riser structure, preheating the casting mould for the first time, putting a sand core into the casting mould so as to form the inner surface of a casting, and preheating the casting mould for the second time within 30min before casting;
installing a filter layer at an air outlet of the riser, pouring through a pouring gate of a casting mold after the installation is finished, wherein the pouring temperature is 1300-1430 ℃, and closing the riser after the pouring is finished;
and (3) carrying out water cooling on the poured mould, opening the mould, taking out the casting, grinding to remove redundant or surplus metal generated in the casting process, and polishing the surface of the casting.
6. The process for manufacturing a heat, wear and corrosion resistant high-chromium heat resistant alloy according to claim 1, wherein the casting waste after the sixth pouring is returned to the furnace for re-processing.
7. The process of claim 1, wherein the step ten comprises: ultrasonic flaw detection, magnetic particle flaw detection or penetration flaw detection, hardness detection, impact value detection and metallographic detection.
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| CN201911421158.5A CN111057938A (en) | 2019-12-31 | 2019-12-31 | Processing technology of heat-resistant, wear-resistant and corrosion-resistant high-chromium heat-resistant alloy |
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| CN201911421158.5A CN111057938A (en) | 2019-12-31 | 2019-12-31 | Processing technology of heat-resistant, wear-resistant and corrosion-resistant high-chromium heat-resistant alloy |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111843512A (en) * | 2020-07-06 | 2020-10-30 | 嘉兴通达机械有限公司 | Hydraulic hose universal joint machining production line and machining process |
| CN113399623A (en) * | 2021-05-27 | 2021-09-17 | 徐州大鼎机械科技有限公司 | Forming process of novel wear-resistant metal casting |
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| CN111843512A (en) * | 2020-07-06 | 2020-10-30 | 嘉兴通达机械有限公司 | Hydraulic hose universal joint machining production line and machining process |
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| CN113399623A (en) * | 2021-05-27 | 2021-09-17 | 徐州大鼎机械科技有限公司 | Forming process of novel wear-resistant metal casting |
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