CN109023157A - A kind of rolled steel bar heating furnace charges stove door plant and its production technology into steel tank - Google Patents
A kind of rolled steel bar heating furnace charges stove door plant and its production technology into steel tank Download PDFInfo
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- CN109023157A CN109023157A CN201811027958.4A CN201811027958A CN109023157A CN 109023157 A CN109023157 A CN 109023157A CN 201811027958 A CN201811027958 A CN 201811027958A CN 109023157 A CN109023157 A CN 109023157A
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- door
- plate
- white mould
- steel
- stove
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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
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/58—Ferrous alloys, e.g. steel alloys containing chromium with nickel with more than 1.5% by weight of manganese
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/02—Sand moulds or like moulds for shaped castings
- B22C9/04—Use of lost patterns
-
- 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
-
- 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
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C30/00—Alloys containing less than 50% by weight of each constituent
-
- 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
- C22C38/002—Ferrous alloys, e.g. steel alloys containing In, Mg, or other elements not provided for in one single group C22C38/001 - C22C38/60
-
- 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
- C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
-
- 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
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/44—Ferrous alloys, e.g. steel alloys containing chromium with nickel with molybdenum or tungsten
-
- 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
- C21D2211/00—Microstructure comprising significant phases
- C21D2211/001—Austenite
-
- 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
Abstract
The invention discloses a kind of rolled steel bar heating furnaces to charge stove door plant into steel tank, including door-plate, the chemical component and mass percent of door-plate are as follows: C:0.25%；Si:1.00%~1.50%；Mn:2.00%；Cr:24.00%~27.00%；Mo:0.50%；Ni:19.00%~22.00%；P :≤0.04%；S :≤0.03%；Fe:46.68%~53.25%, production technology are as follows: (1) being required according to the design drawing of door-plate, design the white mould of door-plate；(2) the white mould of end of door plate carries out finishing, and adds sand ram-jolt；(3) melting molten steel；(4) molten steel is sampled chemical examination, and is poured；(5) sand removal after being poured, and to blank quenching heat treatment；(6) the hot-cast part after quenching heat treatment carries out quality standard inspection.The present invention chemically optimizes on ingredient, improves the rare elements ingredient such as nickel, chromium, improves stove door plant antiwear heat resisting degree, using solid casting, fracture, scaling loss in use process are avoided, is improved into steel tank charging stove door plant quality, its service life is improved, production cost is reduced.
Description
Technical field
The present invention relates to stove door plant technical field of producing, specifically a kind of rolled steel bar heating furnace into steel tank charge furnace
Door-plate and its production technology.
Background technique
Gang Zha factory heating furnace is charged about 1.05 tons of stove door plant piece weight with into steel tank, material category antiwear heat resisting steel part, into
Steel tank charging stove door plant center is filled using carbide, is easily broken off, scaling loss in use process, is seriously affected service life, together
When the rare elements ingredient such as nickel, chromium it is relatively low, cause stove door plant antiwear heat resisting degree to decline, charge stove door plant one into steel tank for a long time
Directly it is outsourcing piece, always exists that procurement cycle is uncontrolled, unstable product quality, service life is short, and purchase cost height etc. is asked
Topic.
Currently, stove door plant is charged by import restriction to get rid of into steel tank, and service life is short, purchase cost is high, increases
The problem of production cost of enterprise, carries out independent development production, production into steel tank charging stove door plant, and is tested by online use
Target is fully achieved in card, provides the novel rolled steel bar heating furnace of one kind hereby into steel tank charging stove door plant, solves steel and roll
The problems such as factory's heating furnace is with import restriction is relied on into steel tank charging stove door plant.
Summary of the invention
1, it to solve the problems, such as
Import is relied on into steel tank charging stove door plant for existing Gang Zha factory heating furnace, unstable product quality uses the longevity
The problem of ordering short, purchase cost height, increasing the production cost of enterprise, the purpose of the present invention is to provide a kind of heating of rolled steel bar
Furnace is into steel tank charging stove door plant, to solve the problems mentioned in the above background technology.
2, technical solution
To achieve the above object, the invention provides the following technical scheme:
A kind of rolled steel bar heating furnace charges stove door plant, including door-plate into steel tank, be equipped with outside the door-plate it is inclined into
Mouth face, and about 1.05 tons of the piece weight of door-plate,
The chemical component and mass percent of the door-plate are as follows: C:0.25%；Si:1.0%~1.5%；Mn:2.0%；
Cr:24.0%~27.0%；Mo:0.5%；Ni:19%~22%；P :≤0.04%；S :≤0.03%,
Yield strength (σ 0.2) >=295Mpa of the door-plate,
Tensile strength (σ b) >=590Mpa of the door-plate,
The end face shrinking percentage (Ψ) >=50% of the door-plate,
The elongation percentage (δ 3) >=35% of the door-plate,
The hardness (HRW)≤187 of the door-plate,
The tissue of the door-plate is Austenitic heat resisting steel, and is made after as cast condition and heat treatment.
A kind of rolled steel bar heating furnace includes the following steps: into the production technology of steel tank charging stove door plant
(1) it is required according to the design drawing of the door-plate, designs the white mould of door-plate, and set white mould Length Contraction rate 2.5%,
Shrinkage in width rate 2% checks whether the white mould shape of door-plate complete and whether size qualified, to the qualified white mould of door-plate place to
With；
(2) polishing overlap and burr carried out to the white mould of the door-plate of production, swabbing simultaneously carries out baking and parches operation, and guarantee
Dead head and running channel setting are reasonable；
(3) the white mould of the door-plate dried grinding process is cased, extrapolation core below the white mould of door-plate, and carries out adding sand shake twice
It is real, it is ensured that sand mold compactability；
(4) cross gate, ingate and the connecting portion of the white mould of end of door plate must be filled up with coating；
(5) when melting, chemical component configuration is carried out according to ingredient first and is weighed: C:0.25%；Si:1.00%~
1.50%；Mn:2.00%；Cr:24.00%~27.00%；Mo:0.50%；Ni:19.00%~22.00%；P :≤
0.04%；S :≤0.03%；Fe:46.68%~53.25%；Then it is firstly added steel scrap, low-carbon ferrochromium, 1/2 molten steel is added
When, add metal nickel plate, when 2/3 molten steel is added, manganese iron, ferrosilicon is added, rare earth alloy is added in ladle, and molten steel tapping temperature
It is 1600-1640 DEG C；
(6) chemical examination is sampled to molten steel, is poured after examining chemical component qualified, and pouring temperature 1530-1570
DEG C, molten steel tapping temperature and pouring temperature walk middle line, and ladle is through overheating, and cylinder-packing is without scaling loss, and when casting is covered with fibrofelt, into
Row pushing off the slag, pouring operation；
(7) after carrying out sand removal operation after casting complete, whether the blank product for examining casting to obtain is qualified, to qualified hair
Base product carries out quenching heat treatment；
(8) carry out quality standard inspection to the hot-cast part after quenching heat treatment: whether size meets drawing requirement, and shape is
It is no complete, if without cold shut, crackle and shrinkage cavity, product after the assay was approved is required blank product.
As further scheme of the invention: the condition of quenching heat treatment are as follows: be heated up to 1080-1100 DEG C, heat preservation 2 is small
When, quenching of coming out of the stove.
3, beneficial effect
Compared with prior art, the beneficial effects of the present invention are:
The present invention chemically optimizes on ingredient, the rare elements ingredient such as nickel, chromium is improved, so that it is resistance to improve stove door plant
Heat resistance is ground, while stove door plant center-filled carbide being cancelled, using solid casting, avoids fracture, scaling loss in use process,
It improves and charges stove door plant quality into steel tank, improve service life, reduce production cost, and solve Gang Zha factory heating furnace with into steel
The problem of slot charges stove door plant by import restriction.
Specific embodiment
Below in conjunction with the embodiment of the present invention, technical scheme in the embodiment of the invention is clearly and completely described,
Obviously, described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.Based in the present invention
Embodiment, every other embodiment obtained by those of ordinary skill in the art without making creative efforts, all
Belong to the scope of protection of the invention.
Embodiment 1
In the embodiment of the present invention, a kind of rolled steel bar heating furnace charges stove door plant, including door-plate into steel tank, the door-plate
Chemical component and mass percent are as follows: C:0.25%；Si:1.20%；Mn:2.00%；Cr:25.50%；Mo:0.50%；Ni:
19.95%；P:0.02%；S:0.15%；Fe:50.43%；
The yield strength (σ 0.2) of the door-plate is 298Mpa, and the tensile strength (σ b) of the door-plate is 605Mpa, described
The end face shrinking percentage (Ψ) of door-plate is 50.50%, and the elongation percentage (δ 3) of the door-plate is 35.80%, the hardness of the door-plate
It (HRW) is 165；
The tissue of the door-plate is Austenitic heat resisting steel, and is made after as cast condition and heat treatment, and door-plate is using solid solution
Mode is heat-treated, and the creep rupture strength and creep-resistant property of heat resisting steel are improved；
It is equipped with inclined inlet face outside the door-plate, steel billet is facilitated to pass in and out, about 1.05 tons of the piece weight of the door-plate；
To produce above-mentioned door-plate, a kind of rolled steel bar heating furnace into steel tank charging stove door plant production technology, including it is as follows
Step:
(1) it is required according to the design drawing of the door-plate, designs the white mould of door-plate, and set white mould Length Contraction rate
2.50%, shrinkage in width rate 2.00%, checking the white mould shape of door-plate, whether complete and size is qualified, to qualified door-plate
Bai Mo places stand-by；
(2) polishing overlap and burr carried out to the white mould of the door-plate of production, swabbing simultaneously carries out baking and parches operation, and guarantee
Dead head and running channel setting are reasonable；
(3) the white mould of the door-plate dried grinding process is cased, extrapolation core below the white mould of door-plate, and carries out adding sand shake twice
It is real, it is ensured that sand mold compactability；
(4) cross gate, ingate and the connecting portion of the white mould of end of door plate must be filled up with coating；
(5) when melting, chemical component configuration is carried out according to ingredient first and is weighed: C:0.25%；Si:1.20%；Mn:
2.00%；Cr:25.50%；Mo:0.50%；Ni:19.95%；P:0.02%；S:0.15%；Fe:50.43%；Then first
Steel scrap, low-carbon ferrochromium is added, when 1/2 molten steel of liquid feeding, adds metal nickel plate, when 2/3 molten steel of liquid feeding, manganese iron, ferrosilicon is added, rare earth closes
Gold is added in ladle, and molten steel tapping temperature is 1610 DEG C；
(6) chemical examination is sampled to molten steel, is poured after examining chemical component qualified, and 1540 DEG C of pouring temperature, steel
Water tapping temperature and pouring temperature walk middle line, and ladle must preheat, and cylinder-packing cannot have a burning phenomenon, and when casting is covered with fibrofelt
Lid conscientiously carries out pushing off the slag, pouring operation；
(7) after carrying out sand removal operation after casting complete, whether the blank product for examining casting to obtain is qualified, to qualified hair
Base product carries out quenching heat treatment, the condition of quenching heat treatment are as follows: is heated up to 1085 DEG C, keeps the temperature 2 hours, quenching of coming out of the stove；
(8) carry out quality standard inspection to the hot-cast part after quenching heat treatment: whether size meets drawing requirement, and shape is
It is no complete, if without cold shut, crackle and shrinkage cavity, product after the assay was approved is required blank product；
The door-plate center produced by above-mentioned production technology is avoided fracture, scaling loss in use process, is mentioned using solid casting
The rare elements ingredients such as high nickel, chromium, to substantially increase the door-plate antiwear heat resisting degree of heating furnace.
Embodiment 2
In the embodiment of the present invention, a kind of rolled steel bar heating furnace charges stove door plant, including door-plate into steel tank, the door-plate
Chemical component and mass percent are as follows: C:0.25%；Si:1.46%；Mn:2.00%；Cr:26.80%；Mo:0.50%；Ni:
21.55%；P:0.03%；S:0.02%；Fe:47.39%；
The yield strength (σ 0.2) of the door-plate is 335Mpa, and the tensile strength (σ b) of the door-plate is 628Mpa, described
The end face shrinking percentage (Ψ) of door-plate is 50.20%, and the elongation percentage (δ 3) of the door-plate is 35.11%, the hardness of the door-plate
(HRW)≤180；
The tissue of the door-plate is Austenitic heat resisting steel, and is made after as cast condition and heat treatment, and door-plate is using solid solution
Mode is heat-treated, and the creep rupture strength and creep-resistant property of heat resisting steel are improved；
It is equipped with inclined inlet face outside the door-plate, steel billet is facilitated to pass in and out, about 1.05 tons of the piece weight of the door-plate；
To produce above-mentioned door-plate, a kind of rolled steel bar heating furnace into steel tank charging stove door plant production technology, including it is as follows
Step:
(1) it is required according to the design drawing of the door-plate, designs the white mould of door-plate, and set white mould Length Contraction rate
2.50%, shrinkage in width rate 2.00%, checking the white mould shape of door-plate, whether complete and size is qualified, to qualified door-plate
Bai Mo places stand-by；
(2) polishing overlap and burr carried out to the white mould of the door-plate of production, swabbing simultaneously carries out baking and parches operation, and guarantee
Dead head and running channel setting are reasonable；
(3) the white mould of the door-plate dried grinding process is cased, extrapolation core below the white mould of door-plate, and carries out adding sand shake twice
It is real, it is ensured that sand mold compactability；
(4) cross gate, ingate and the connecting portion of the white mould of end of door plate must be filled up with coating；
(5) when melting, chemical component configuration is carried out according to ingredient first and is weighed: C:0.25%；Si:1.46%；Mn:
2.00%；Cr:26.80%；Mo:0.50%；Ni:21.55%；P:0.03%；S:0.02%；Fe:47.39%；Then first
Steel scrap, low-carbon ferrochromium is added, when 1/2 molten steel of liquid feeding, adds metal nickel plate, when 2/3 molten steel of liquid feeding, manganese iron, ferrosilicon is added, rare earth closes
Gold is added in ladle, and molten steel tapping temperature is 1635 DEG C；
(6) chemical examination is sampled to molten steel, is poured after examining chemical component qualified, and 1565 DEG C of pouring temperature, steel
Water tapping temperature and pouring temperature walk middle line, and ladle must preheat, and cylinder-packing cannot have a burning phenomenon, and when casting is covered with fibrofelt
Lid conscientiously carries out pushing off the slag, pouring operation；
(7) after carrying out sand removal operation after casting complete, whether the blank product for examining casting to obtain is qualified, to qualified hair
Base product carries out quenching heat treatment, the condition of quenching heat treatment are as follows: is heated up to 1090 DEG C, keeps the temperature 2 hours, quenching of coming out of the stove；
(8) carry out quality standard inspection to the hot-cast part after quenching heat treatment: whether size meets drawing requirement, and shape is
It is no complete, if without cold shut, crackle and shrinkage cavity, product after the assay was approved is required blank product；
The door-plate center produced by above-mentioned production technology is avoided fracture, scaling loss in use process, is mentioned using solid casting
The rare elements ingredients such as high nickel, chromium, to substantially increase the door-plate antiwear heat resisting degree of heating furnace.
Embodiment 3
In the embodiment of the present invention, a kind of rolled steel bar heating furnace charges stove door plant, including door-plate into steel tank, the door-plate
Chemical component and mass percent are as follows: C:0.25%；Si:1.28%；Mn:2.00%；Cr:25.58%；Mo:0.50%；Ni:
20.54%；P:0.01%；S:0.01%；Fe:49.83%；
The yield strength (σ 0.2) of the door-plate is 315Mpa, and the tensile strength (σ b) of the door-plate is 620Mpa, described
The end face shrinking percentage (Ψ) of door-plate is 50.31%, and the elongation percentage (δ 3) of the door-plate is 35.65%, the hardness of the door-plate
It (HRW) is 174；
The tissue of the door-plate is Austenitic heat resisting steel, and is made after as cast condition and heat treatment, and door-plate is using solid solution
Mode is heat-treated, and the creep rupture strength and creep-resistant property of heat resisting steel are improved；
It is equipped with inclined inlet face outside the door-plate, steel billet is facilitated to pass in and out, about 1.05 tons of the piece weight of the door-plate；
To produce above-mentioned door-plate, a kind of rolled steel bar heating furnace into steel tank charging stove door plant production technology, including it is as follows
Step:
(1) it is required according to the design drawing of the door-plate, designs the white mould of door-plate, and set white mould Length Contraction rate
2.50%, shrinkage in width rate 2.00%, checking the white mould shape of door-plate, whether complete and size is qualified, to qualified door-plate
Bai Mo places stand-by；
(2) polishing overlap and burr carried out to the white mould of the door-plate of production, swabbing simultaneously carries out baking and parches operation, and guarantee
Dead head and running channel setting are reasonable；
(3) the white mould of the door-plate dried grinding process is cased, extrapolation core below the white mould of door-plate, and carries out adding sand shake twice
It is real, it is ensured that sand mold compactability；
(4) cross gate, ingate and the connecting portion of the white mould of end of door plate must be filled up with coating；
(5) when melting, chemical component configuration is carried out according to ingredient first and is weighed: C:0.25%；Si:1.28%；Mn:
2.00%；Cr:25.58%；Mo:0.50%；Ni:20.54%；P:0.01%；S:0.01%；Fe:49.83%；Then first
Steel scrap, low-carbon ferrochromium is added, when 1/2 molten steel of liquid feeding, adds metal nickel plate, when 2/3 molten steel of liquid feeding, manganese iron, ferrosilicon is added, rare earth closes
Gold is added in ladle, and molten steel tapping temperature is 1630 DEG C；
(6) chemical examination is sampled to molten steel, is poured after examining chemical component qualified, and 1555 DEG C of pouring temperature, steel
Water tapping temperature and pouring temperature walk middle line, and ladle must preheat, and cylinder-packing cannot have a burning phenomenon, and when casting is covered with fibrofelt
Lid conscientiously carries out pushing off the slag, pouring operation；
(7) after carrying out sand removal operation after casting complete, whether the blank product for examining casting to obtain is qualified, to qualified hair
Base product carries out quenching heat treatment, the condition of quenching heat treatment are as follows: is heated up to 1095 DEG C, keeps the temperature 2 hours, quenching of coming out of the stove；
(8) carry out quality standard inspection to the hot-cast part after quenching heat treatment: whether size meets drawing requirement, and shape is
It is no complete, if without cold shut, crackle and shrinkage cavity, product after the assay was approved is required blank product；
The door-plate center produced by above-mentioned production technology is avoided fracture, scaling loss in use process, is mentioned using solid casting
The rare elements ingredients such as high nickel, chromium, to substantially increase the door-plate antiwear heat resisting degree of heating furnace.
It is obvious to a person skilled in the art that invention is not limited to the details of the above exemplary embodiments, Er Qie
In the case where without departing substantially from spirit or essential attributes of the invention, the present invention can be realized in other specific forms.Therefore, no matter
From the point of view of which point, the present embodiments are to be considered as illustrative and not restrictive, and the scope of the present invention is by appended power
Benefit requires rather than above description limits, it is intended that all by what is fallen within the meaning and scope of the equivalent elements of the claims
Variation is included within the present invention.
In addition, it should be understood that although this specification is described in terms of embodiments, but not each embodiment is only wrapped
Containing an independent technical solution, this description of the specification is merely for the sake of clarity, and those skilled in the art should
It considers the specification as a whole, the technical solutions in the various embodiments may also be suitably combined, forms those skilled in the art
The other embodiments being understood that.
Claims (3)
1. a kind of rolled steel bar heating furnace charges stove door plant into steel tank, including door-plate, which is characterized in that be equipped with outside the door-plate
Inclined inlet face, and about 1.05 tons of the piece weight of door-plate, the chemical component and mass percent of the door-plate are as follows: C:
0.25%；Si:1.00%~1.50%；Mn:2.00%；Cr:24.00%~27.00%；Mo:0.50%；Ni:19.00%~
22.00%；P :≤0.04%；S :≤0.03%；Fe:46.68%~53.25%；
Yield strength (σ 0.2) >=295Mpa of the door-plate,
Tensile strength (σ b) >=590Mpa of the door-plate,
The end face shrinking percentage (Ψ) >=50% of the door-plate,
The elongation percentage (δ 3) >=35% of the door-plate,
The hardness (HRW)≤187 of the door-plate,
The tissue of the door-plate is Austenitic heat resisting steel, and is made after as cast condition and heat treatment.
2. a kind of rolled steel bar heating furnace includes the following steps: into the production technology of steel tank charging stove door plant
(1) it is required according to the design drawing of the door-plate, designs the white mould of door-plate, and set white mould Length Contraction rate 2.5%, width
Shrinking percentage 2%, checking the white mould shape of door-plate, whether complete and size is qualified, places to the qualified white mould of door-plate stand-by；
(2) polishing overlap and burr carried out to the white mould of the door-plate of production, swabbing simultaneously carries out baking and parches operation, and guarantee is poured and emitted
Mouth and running channel setting are reasonable；
(3) the white mould of the door-plate dried grinding process is cased, extrapolation core below the white mould of door-plate, and carries out adding sand ram-jolt twice,
Ensure sand mold compactability；
(4) cross gate, ingate and the connecting portion of the white mould of end of door plate must be filled up with coating；
(5) when melting, chemical component configuration is carried out according to ingredient first and is weighed: C:0.25%；Si:1.00%~1.50%；Mn:
2.00%；Cr:24.00%~27.00%；Mo:0.50%；Ni:19.00%~22.00%；P :≤0.04%；S :≤
0.03%；Fe:46.68%~53.25%；Then it is firstly added steel scrap, low-carbon ferrochromium, when 1/2 molten steel is added, adds metallic nickel
Plate when 2/3 molten steel is added, is added manganese iron, ferrosilicon, rare earth alloy is added in ladle, and molten steel tapping temperature is 1600-1640
℃；
(6) chemical examination is sampled to molten steel, is poured after examining chemical component qualified, and 1530-1570 DEG C of pouring temperature,
Molten steel tapping temperature and pouring temperature walk middle line, and ladle is through overheating, and cylinder-packing is without scaling loss, and when casting is covered with fibrofelt, carry out
Pushing off the slag, pouring operation；
(7) after carrying out sand removal operation after casting complete, whether the blank product for examining casting to obtain is qualified, produces to qualified blank
Product carry out quenching heat treatment；
(8) carry out quality standard inspection to the hot-cast part after quenching heat treatment: whether size meets drawing requirement, and whether shape is complete
It is whole, if without cold shut, crackle and shrinkage cavity, product after the assay was approved is required blank product.
3. a kind of rolled steel bar heating furnace according to claim 2 into steel tank charge stove door plant, which is characterized in that quenching heat
The condition of processing are as follows: be heated up to 1080-1100 DEG C, keep the temperature 2 hours, quenching of coming out of the stove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811027958.4A CN109023157A (en) | 2018-09-04 | 2018-09-04 | A kind of rolled steel bar heating furnace charges stove door plant and its production technology into steel tank |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811027958.4A CN109023157A (en) | 2018-09-04 | 2018-09-04 | A kind of rolled steel bar heating furnace charges stove door plant and its production technology into steel tank |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112247038A (en) * | 2020-11-12 | 2021-01-22 | 阳春新钢铁有限责任公司 | Wire rod steel rolling part and steel rolling part production process thereof |
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| JP2009249658A (en) * | 2008-04-02 | 2009-10-29 | Daido Steel Co Ltd | Austenitic stainless steel for heat-resistant parts, and heat-resistant parts using the steel |
| CN106544601A (en) * | 2016-12-29 | 2017-03-29 | 董世祥 | Many performance high temperature resistant series cast steels |
| CN107532261A (en) * | 2015-06-04 | 2018-01-02 | 丰田自动车株式会社 | Austenite heat-resistant cast steel |
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| JPH07278759A (en) * | 1994-04-14 | 1995-10-24 | Hitachi Metals Ltd | Austenitic heat resistant cast steel, excellent in strength at high temperature and machinability, and exhaust system parts made thereof |
| CN1576381A (en) * | 2003-07-17 | 2005-02-09 | 住友金属工业株式会社 | Stainless steel and stainless steel pipe having resistance to carburization and coking |
| JP2009249658A (en) * | 2008-04-02 | 2009-10-29 | Daido Steel Co Ltd | Austenitic stainless steel for heat-resistant parts, and heat-resistant parts using the steel |
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| CN112247038A (en) * | 2020-11-12 | 2021-01-22 | 阳春新钢铁有限责任公司 | Wire rod steel rolling part and steel rolling part production process thereof |
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Application publication date: 20181218 |