CN108611549A - A kind of manufacturing method of low-alloy wear-resistant steel - Google Patents
A kind of manufacturing method of low-alloy wear-resistant steel Download PDFInfo
- Publication number
- CN108611549A CN108611549A CN201611133076.7A CN201611133076A CN108611549A CN 108611549 A CN108611549 A CN 108611549A CN 201611133076 A CN201611133076 A CN 201611133076A CN 108611549 A CN108611549 A CN 108611549A
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- Prior art keywords
- melting
- cooling
- temperature
- casting
- resistant steel
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D30/00—Cooling castings, not restricted to casting processes covered by a single main group
-
- 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
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/18—Hardening; Quenching with or without subsequent tempering
-
- 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
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/26—Methods of annealing
-
- 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
- C21D5/00—Heat treatments of cast-iron
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C37/00—Cast-iron alloys
- C22C37/06—Cast-iron alloys containing chromium
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C37/00—Cast-iron alloys
- C22C37/10—Cast-iron alloys containing aluminium or silicon
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Heat Treatment Of Articles (AREA)
Abstract
The invention discloses a kind of manufacturing methods of low-alloy wear-resistant steel.It includes the following steps：A, dispensing；B, melting：By melting stove evacuation, dispensing is put into vacuum melting furnace melting；C, it pours into a mould；D, cooling：After casting is by air-cooled cooling, by cooling by water, condensed by condensing unit；E, it anneals：It is heated after casting grinding is processed, keeps the temperature, then heat up and keep the temperature, later quick water cooling；F, it quenches：By cast member heating quenching, it is tempered in time after quenching.It has the following effects that:Rationally define ratio between carbon content and chromium, nickel and carbon, select proper ratio other materials ingredient, and melting is carried out after extracting vacuum, keeps the uniformity that its solution dissolves good, cast postcooling is gradually cooled down by three kinds of modes, it ensure that the quality of casting, the backplate produced has unusual hardness, also has good toughness, has the performances such as wear-resisting, shock resistance, meet ball blast being required to mechanical performance in the process, extends service life.
Description
Technical field
The present invention relates to a kind of shot blast room backplate steel, especially a kind of manufacturing method of low-alloy wear-resistant steel.
Background technology
Shot-blasting machine is to be sprayed bullet high speed using high-speed rotating impeller head, and bullet is made to have certain kinetic energy, high speed
The bullet of linear motion directly impacts on the surface of the workpiece, and to remove the rusty stain of workpiece surface, but shot-blasting machine is carrying out ball blast
During have bullet and beaten in the chamber body of shot-blasting machine around workpiece, the bullet of high speed can punch chamber body over time, because
This is usually laid with backplate in shot blasting machine chamber body in the prior art, and existing backplate type is relatively more, generally uses rich chromium cast iron
Or manganese steel plate, but in the bullet for being faced with high speed injection, existing backplate keeps its intensity still inadequate due to problem of materials
Good, service life is not grown, therefore will be replaced after a period of use, is thus not only caused the waste in cost but also is indulged in
It delays work the phase, influences production efficiency.
Invention content
The technical problem to be solved in the present invention is to provide a kind of wearabilities good, strong shock resistance and with long service life low
The manufacturing method of alloy abrasion resistant steel.
In order to solve the above-mentioned technical problem, the manufacturing method of low-alloy wear-resistant steel of the invention, includes the following steps：
A, dispensing：By weight percentage, by following chemical composition dispensing, carbon 3.50~4.50%, tungsten 0.8~1.3%, copper 1.3
~2. 50%, rare earth 0.9~2.0%, manganese 1.3~1.8%, chromium 2~3%, silicon 2.5~3.7%, vanadium 0.9~1.8%, boron 0.3~0.
6%, surplus is iron；
B, melting：By melting stove evacuation so that the pressure in smelting furnace is 2.5~3.5Pa, and dispensing obtained by step A is put into
Vacuum melting furnace carries out melting；
C, it pours into a mould：The solution that step B is obtained is poured into a mould in sandbox, pouring temperature is 1800~1950 DEG C；
D, cooling：After the casting that step C is obtained is by 45~55 min of air-cooled cooling, by 20~25min of cooling by water,
Then 15~25 min are condensed by condensing unit；
E, it anneals：750~890 DEG C are heated to after casting after cooling in step D is carried out polishing processing, heat preservation 60~75
Min then heats to 1050-1060 degrees Celsius and keeps the temperature 90~120 minutes, later quick water cooling；
F, it quenches：Cast member is heated to 670~750 DEG C to quench, is tempered in time after quenching, temperature 320
~370 DEG C.
In the step B, when melting, smelting temperature is 1420~1620 DEG C, and smelting time is 55~60 min, goes out furnace temperature
Degree is 100~1350 DEG C.
In the step C, casting fully solidifies 25~35 min in sandbox after cast.
In the step F, the cool time is 3~6h.
Compared to the prior art, the invention has the advantages that:
Due to rationally defining the content of carbon and specifically defining the ratio between chromium, nickel and carbon, at the same time, select to close
The other materials ingredient of suitable ratio, and melting is carried out after extracting vacuum, thus make the uniformity that its solution dissolves good, in addition,
Cast postcooling is gradually cooled down by three kinds of modes, ensure that the quality of casting, and the backplate thus produced has very hard
Degree, it is often more important that also there is good toughness, make it have the performances such as wear-resisting, shock resistance, meet ball blast in the process to machinery
Being required for performance, extends service life, in addition, treatment process of the present invention, rational annealing and quencher
Skill improves alloy structure performance, finally makes its hardness HRC67~75, and impact flexibility is good, and comprehensive mechanical performance is good, makes manufactured
Product has reached wear-resisting and moderate blow performance requirement, and service life is 2~3 times of potassium steel.
Specific implementation mode
With reference to embodiment, the manufacturing method of the low-alloy wear-resistant steel of the present invention is made further specifically
It is bright.
The manufacturing method of the low-alloy wear-resistant steel of the present invention, includes the following steps：
A, dispensing：By weight percentage, by following chemical composition dispensing, carbon 3.50~4.50%, tungsten 0.8~1.3%, copper 1.3
~2. 50%, rare earth 0.9~2.0%, manganese 1.3~1.8%, chromium 2~3%, silicon 2.5~3.7%, vanadium 0.9~1.8%, boron 0.3~0.
6%, surplus is iron；
B, melting：By melting stove evacuation so that the pressure in smelting furnace is 2.5~3.5Pa, and dispensing obtained by step A is put into
Vacuum melting furnace carries out melting；When melting, smelting temperature is 1420~1620 DEG C, and smelting time is 55~60 min, goes out furnace temperature
Degree is 100~1350 DEG C；
C, it pours into a mould：The solution that step B is obtained is poured into a mould in sandbox, pouring temperature is 1800~1950 DEG C；After cast
Casting fully solidifies 25~35 min in sandbox；
D, cooling：After the casting that step C is obtained is by 45~55 min of air-cooled cooling, by 20~25min of cooling by water,
Then 15~25 min are condensed by condensing unit；
E, it anneals：750~890 DEG C are heated to after casting after cooling in step D is carried out polishing processing, heat preservation 60~75
Min then heats to 1050-1060 degrees Celsius and keeps the temperature 90~120 minutes, later quick water cooling；
F, it quenches：Cast member is heated to 670~750 DEG C to quench, the cool time is 3~6h, is returned in time after quenching
Fire, temperature are 320~370 DEG C.
Claims (4)
1. a kind of manufacturing method of low-alloy wear-resistant steel, it is characterised in that：Include the following steps：
A, dispensing：By weight percentage, by following chemical composition dispensing, carbon 3.50~4.50%, tungsten 0.8~1.3%, copper 1.3
~2. 50%, rare earth 0.9~2.0%, manganese 1.3~1.8%, chromium 2~3%, silicon 2.5~3.7%, vanadium 0.9~1.8%, boron 0.3~0.
6%, surplus is iron；
B, melting：By melting stove evacuation so that the pressure in smelting furnace is 2.5~3.5Pa, and dispensing obtained by step A is put into
Vacuum melting furnace carries out melting；
C, it pours into a mould：The solution that step B is obtained is poured into a mould in sandbox, pouring temperature is 1800~1950 DEG C；
D, cooling：After the casting that step C is obtained is by 45~55 min of air-cooled cooling, by 20~25min of cooling by water,
Then 15~25 min are condensed by condensing unit；
E, it anneals：750~890 DEG C are heated to after casting after cooling in step D is carried out polishing processing, heat preservation 60~75
Min then heats to 1050-1060 degrees Celsius and keeps the temperature 90~120 minutes, later quick water cooling；
F, it quenches：Cast member is heated to 670~750 DEG C to quench, is tempered in time after quenching, temperature 320
~370 DEG C.
2. the manufacturing method of low-alloy wear-resistant steel described in accordance with the claim 1, it is characterised in that：In the step B, melting
When, smelting temperature is 1420~1620 DEG C, and smelting time is 55~60 min, and tapping temperature is 100~1350 DEG C.
3. the manufacturing method of low-alloy wear-resistant steel described in accordance with the claim 1, it is characterised in that：In the step C, after cast
Casting fully solidifies 25~35 min in sandbox.
4. the manufacturing method of low-alloy wear-resistant steel described in accordance with the claim 1, it is characterised in that：In the step F, when quenching
Between be 3~6h.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611133076.7A CN108611549A (en) | 2016-12-10 | 2016-12-10 | A kind of manufacturing method of low-alloy wear-resistant steel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611133076.7A CN108611549A (en) | 2016-12-10 | 2016-12-10 | A kind of manufacturing method of low-alloy wear-resistant steel |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108611549A true CN108611549A (en) | 2018-10-02 |
Family
ID=63644040
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611133076.7A Pending CN108611549A (en) | 2016-12-10 | 2016-12-10 | A kind of manufacturing method of low-alloy wear-resistant steel |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108611549A (en) |
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2016
- 2016-12-10 CN CN201611133076.7A patent/CN108611549A/en active Pending
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|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20181002 |