CN109570688A - A kind of method of gas flame cuttiug carbon steel blank - Google Patents
A kind of method of gas flame cuttiug carbon steel blank Download PDFInfo
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- CN109570688A CN109570688A CN201910004458.7A CN201910004458A CN109570688A CN 109570688 A CN109570688 A CN 109570688A CN 201910004458 A CN201910004458 A CN 201910004458A CN 109570688 A CN109570688 A CN 109570688A
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- blank
- temperature
- gas flame
- carbon steel
- flame cuttiug
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K7/00—Cutting, scarfing, or desurfacing by applying flames
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Metal Rolling (AREA)
Abstract
The invention discloses a kind of methods of gas flame cuttiug carbon steel blank, it is related to metallurgical technology field, carbon steel needs to carry out to should ensure that blank temperature when gas flame cuttiug at 150 DEG C or more, and when blank temperature is lower than 150 DEG C, needing for blank to be reheated to 150 DEG C or more can be cut；Carbon steel charge length direction needs to carry out to should ensure that blank temperature at 150 DEG C or more when gas flame cuttiug；Carbon steel blank width direction needs to carry out to should ensure that blank temperature at 150 DEG C or more, and is avoided slab triangle region and cut when gas flame cuttiug.The present invention optimizes the Fine Steel Casting iron slab cutting technique of carbon content 0.40%~0.60%, guarantees that rolled plate does not occur because of the defects of crackle caused by cutting offline, cutting cracking.
Description
Technical field
The present invention relates to metallurgical technology fields, more particularly to a kind of method of gas flame cuttiug carbon steel blank.
Background technique
Carbon steel is phosphorus content less than 2.11%, in addition to the impurity such as silicon, manganese, phosphorus, sulphur within iron, carbon and limitation, is free of it
The iron-carbon alloy of his alloying element.The phosphorus content of industrial carbon steel is generally 0.05%~1.35%.The performance of carbon steel mainly takes
Certainly in phosphorus content, phosphorus content increases, and intensity, the hardness of steel increase, and plasticity, toughness and solderability reduce.
Gas flame cuttiug is a kind of usual way of blank processing, is cut using the high temperature generated in iron oxide combustion process
The combustion oxidation iron that is designed as of carbon steel, flame cutting torch provides sufficient oxygen, to guarantee to obtain good cutting effect.
Present steel-making continuous casting can normally produce the Fine Steel Casting iron of carbon content 0.40%~0.60%, guarantee to produce base
The quality while improving production efficiency of material, produce subsidiary remaining base and are usually cut when in use, ordered with reaching production
Size required for list.But such carbon steel blank is cut easily generation secondary defect when temperature is lower, mainly
Because being cooled to environment temperature with blank after gas flame cuttiug blanking, residual tension is answered with caused by phase transformation on the cut surface of blank
Power superposition can reach maximum value, and residual stress is once more than the tensile strength of steel, just starts to generate on the cut surface of blank
Micro-crack, and it is gradually extended to macroscopic cracking, it is affected to plate quality is rolled into, influences order delivery.
Summary of the invention
In order to solve the above technical problems, the present invention provides a kind of method of gas flame cuttiug carbon steel blank, carbon steel is needed
It carries out should ensure that blank temperature at 150 DEG C or more, when blank temperature is lower than 150 DEG C, is needed blank again when gas flame cuttiug
Being heated to 150 DEG C or more can be cut；Carbon steel charge length direction needs to carry out to should ensure that blank temperature when gas flame cuttiug
Degree is at 150 DEG C or more；Carbon steel blank width direction need to carry out to should ensure that when gas flame cuttiug blank temperature at 150 DEG C or more,
And it avoids slab triangle region and is cut.
Technical effect: the present invention optimizes the Fine Steel Casting iron slab cutting technique of carbon content 0.40%~0.60%,
Ensure carbon steel blank charge quality, guarantee cut quality when cutting offline, guarantees that leading because of offline cutting does not occur in rolled plate
The defects of crackle of cause, cutting are cracked, is particularly suitable for carbon steel manufacturing enterprise, has good promotional value.
The technical solution that the present invention further limits is:
Further, when blank temperature is lower than 150 DEG C, trolley stove heating is carried out to blank, heating time is in 6h or more, heating temperature
250 DEG C of degree or more.
A kind of method of preceding gas flame cuttiug carbon steel blank, when blank temperature is lower than 150 DEG C, blank enters heating
Formula holding pit is heated, heating time in 6h or more, 250 DEG C of heating temperature or more.
The method of preceding a kind of gas flame cuttiug carbon steel blank, when blank temperature is lower than 150 DEG C, under blank is placed on just
Heated among the red base heap of line, heating time more than for 24 hours, 250 DEG C of heating temperature or more.
A kind of method of preceding gas flame cuttiug carbon steel blank, 32 DEG C of 50# steel blank surface temperature, specification
260mm × 2070mm × 8014mm, plan cutting be 1 piece of 260mm × 2070mm × 3787mm and 1 pieces of 260mm × 2070mm ×
4210mm blank heats blank material feeding car type furnace, and 300 DEG C of heating temperature, heating time 8h, the blank after heating is cold
But to 160 DEG C of progress gas flame cuttiugs.
A kind of method of preceding gas flame cuttiug carbon steel blank, 27 DEG C of 45# steel blank surface temperature, specification
320mm × 2070mm × 5003mm, plan cutting be 1 piece of 320mm × 2070mm × 4499mm and 1 pieces of 320mm × 2070mm ×
504mm blank heats blank material feeding heated type holding pit, 280 DEG C of heating temperature, heating time 8h, after heating
Blank is cooled to 157 DEG C of progress gas flame cuttiugs.
A kind of method of preceding gas flame cuttiug carbon steel blank, 35 DEG C of 45# steel blank surface temperature, specification
150mm × 2590mm × 7543mm, plan cutting be 3 pieces of 150mm × 2590mm × 1886mm and 1 pieces of 150mm × 2590mm ×
Blank material is placed in just offline red base heap by 1885mm blank, and 2 blocks of red blanks are padded in lower section, and lid 7 blocks of red blanks in top are offline
When red blank temperature reach 650 DEG C, de-stacking after 26h is pressed from both sides among blank, 45# steel blank is hung out, it is 325 DEG C of blank temperature, cold
Gas flame cuttiug is carried out when but to 162 DEG C.
A kind of method of preceding gas flame cuttiug carbon steel blank will need cutting blank to be hoisted to cutting goods yard, by
Cutter confirms blank temperature, after temperature is qualified, confirms cut lengths, rail mounted fire is cut machine after confirmation and is placed on blank
On cut according to plan cut lengths, blank is hung to goods yard to be produced after blank cutting.
The beneficial effects of the present invention are:
(1) such carbon steel blank is cut easily generation secondary defect when temperature is lower in the present invention, is primarily due to
It is cooled to environment temperature with blank after gas flame cuttiug blanking, residual tension and stress caused by phase transformation are folded on the cut surface of blank
Maximum value can be reached by adding, and residual stress is once more than the tensile strength of steel, just start to generate fine fisssure on the cut surface of blank
Line, and be gradually extended to macroscopic cracking, is affected to plate quality is rolled into, and influences order delivery, blank temperature 150 DEG C with
The generation of stress can be effectively reduced when upper；
(2) slab trigonum inboard is the final solidified position of slab in the present invention, which causes largely to be mingled with because of segregation reason
Object and segregation element are concentrated, and in this position, cutting easily causes blank blank to cut crackle, therefore cannot be trivial in slab triangle
It is cut in domain；
(3) car type furnace can guarantee with heated type holding pit heating effect in the present invention, and heating efficiency is high but need to be increased using coal gas
Add departmental cost, red base stacking can guarantee heating temperature but heating time is longer, without increasing cost, actual production Shi Kegen
According to demand flexible choice.
Detailed description of the invention
Fig. 1 is 1 schematic diagram of embodiment；
Fig. 2 is 2 schematic diagram of embodiment；
Fig. 3 is 3 schematic diagram of embodiment；
Fig. 4,5 are comparative example schematic diagram.
Specific embodiment
Carbon steel needs to carry out to should ensure that blank temperature when gas flame cuttiug at 150 DEG C or more, and blank temperature is lower than 150 DEG C
When, needing for blank to be reheated to 150 DEG C or more can cut；Carbon steel charge length direction needs to carry out flame and cuts
It should ensure that blank temperature at 150 DEG C or more when cutting；Carbon steel blank width direction needs to carry out to should ensure that blank when gas flame cuttiug
Temperature is avoided slab triangle region and is cut at 150 DEG C or more.
Embodiment 1
As shown in Figure 1, a kind of method of gas flame cuttiug carbon steel blank provided in this embodiment, 50# steel blank surface temperature 32
DEG C, specification 260mm × 2070mm × 8014mm, plan cutting is 1 piece of 260mm × 2070mm × 3787mm and 1 pieces of 260mm
× 2070mm × 4210mm blank heats blank material feeding car type furnace, 300 DEG C of heating temperature, heating time 8h, heating
Blank afterwards is cooled to 160 DEG C of progress gas flame cuttiugs, and blank arranges normal rolling after cutting, and it is normal to roll rear plate quality.
Embodiment 2
As shown in Fig. 2, a kind of method of gas flame cuttiug carbon steel blank provided in this embodiment, 45# steel blank surface temperature 27
DEG C, specification 320mm × 2070mm × 5003mm, plan cutting is 1 piece of 320mm × 2070mm × 4499mm and 1 pieces of 320mm
× 2070mm × 504mm blank heats blank material feeding heated type holding pit, 280 DEG C of heating temperature, heating time
8h, the blank after heating are cooled to 157 DEG C of progress gas flame cuttiugs, and blank arranges normal rolling after cutting, are rolling rear plate quality just
Often.
Embodiment 3
As shown in figure 3, a kind of method of gas flame cuttiug carbon steel blank provided in this embodiment, 45# steel blank surface temperature 35
DEG C, specification 150mm × 2590mm × 7543mm, plan cutting is 3 pieces of 150mm × 2590mm × 1886mm and 1 pieces of 150mm
Blank material is placed in just offline red base heap by × 2590mm × 1885mm blank, and 2 blocks of red blanks are padded in lower section, and 7 pieces of top lid red
Blank, red blank temperature reaches 650 DEG C when offline, and de-stacking after 26h is pressed from both sides among blank, 45# steel blank is hung out, blank temperature
325 DEG C, gas flame cuttiug is carried out when being cooled to 162 DEG C, blank arranges normal rolling after cutting, and it is normal to roll rear plate quality.
Comparative example
As shown in Figure 4,5, blank temperature carries out gas flame cuttiug under normal temperature state, and rolled plate end cutting easily occurs and splits
Line.
In addition to the implementation, the present invention can also have other embodiments.It is all to use equivalent substitution or equivalent transformation shape
At technical solution, fall within the scope of protection required by the present invention.
Claims (8)
1. a kind of method of gas flame cuttiug carbon steel blank, it is characterised in that: carbon steel needs to carry out to should ensure that when gas flame cuttiug
Blank temperature is at 150 DEG C or more, and when blank temperature is lower than 150 DEG C, needing for blank to be reheated to 150 DEG C or more can be carried out
Cutting；Carbon steel charge length direction needs to carry out to should ensure that blank temperature at 150 DEG C or more when gas flame cuttiug；Carbon steel blank
Width direction need to carry out to should ensure that when gas flame cuttiug blank temperature at 150 DEG C or more, and avoid slab triangle region progress
Cutting.
2. a kind of method of gas flame cuttiug carbon steel blank according to claim 1, it is characterised in that: blank temperature is lower than
At 150 DEG C, trolley stove heating is carried out to blank, heating time in 6h or more, 250 DEG C of heating temperature or more.
3. a kind of method of gas flame cuttiug carbon steel blank according to claim 1, it is characterised in that: blank temperature is lower than
At 150 DEG C, blank enters heated type holding pit and is heated, heating time in 6h or more, 250 DEG C of heating temperature or more.
4. a kind of method of gas flame cuttiug carbon steel blank according to claim 1, it is characterised in that: blank temperature is lower than
At 150 DEG C, blank is placed among just offline red base heap and is heated, heating time more than for 24 hours, 250 DEG C of heating temperature with
On.
5. a kind of method of gas flame cuttiug carbon steel blank according to claim 2, it is characterised in that: 50# steel blank table
32 DEG C of face temperature, specification 260mm × 2070mm × 8014mm, plan cutting for 1 piece of 260mm × 2070mm × 3787mm and
1 piece of 260mm × 2070mm × 4210mm blank heats blank material feeding car type furnace, 300 DEG C of heating temperature, when heating
Between 8h, the blank after heating is cooled to 160 DEG C of progress gas flame cuttiugs.
6. a kind of method of gas flame cuttiug carbon steel blank according to claim 2, it is characterised in that: 45# steel blank table
27 DEG C of face temperature, specification 320mm × 2070mm × 5003mm, plan cutting for 1 piece of 320mm × 2070mm × 4499mm and
Blank material feeding heated type holding pit is heated, 280 DEG C of heating temperature, is added by 1 piece of 320mm × 2070mm × 504mm blank
Hot time 8h, the blank after heating are cooled to 157 DEG C of progress gas flame cuttiugs.
7. a kind of method of gas flame cuttiug carbon steel blank according to claim 4, it is characterised in that: 45# steel blank table
35 DEG C of face temperature, specification 150mm × 2590mm × 7543mm, plan cutting for 3 pieces of 150mm × 2590mm × 1886mm and
Blank material is placed in just offline red base heap by 1 piece of 150mm × 2590mm × 1885mm blank, and 2 blocks of red blanks are padded in lower section, on
7 blocks of red blanks of square lid, red blank temperature reaches 650 DEG C when offline, and de-stacking after 26h is pressed from both sides among blank, 45# steel blank is hung
Out, 325 DEG C of blank temperature carry out gas flame cuttiug when being cooled to 162 DEG C.
8. a kind of method of gas flame cuttiug carbon steel blank according to claim 1, it is characterised in that: will need to cut base
Material is hoisted to cutting goods yard, is confirmed by cutter to blank temperature, after temperature is qualified, confirms cut lengths, will after confirmation
Rail mounted fire is cut machine and is placed on blank to be cut according to plan cut lengths, and blank is hung to goods to be produced after blank cutting
Position.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910004458.7A CN109570688A (en) | 2019-01-03 | 2019-01-03 | A kind of method of gas flame cuttiug carbon steel blank |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910004458.7A CN109570688A (en) | 2019-01-03 | 2019-01-03 | A kind of method of gas flame cuttiug carbon steel blank |
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| CN109570688A true CN109570688A (en) | 2019-04-05 |
Family
ID=65915912
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| CN201910004458.7A Pending CN109570688A (en) | 2019-01-03 | 2019-01-03 | A kind of method of gas flame cuttiug carbon steel blank |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS52149247A (en) * | 1976-06-07 | 1977-12-12 | Kobe Steel Ltd | Powder metal gas cutting method and powder metal used therefor |
| CN101716660A (en) * | 2009-11-28 | 2010-06-02 | 山西太钢不锈钢股份有限公司 | Continuous casting method of heat-resistance stainless steel for steam turbine blade |
| CN103170704A (en) * | 2013-03-16 | 2013-06-26 | 南阳汉冶特钢有限公司 | Flame cutting process of steel plate of extremely thick medium and high carbon steel and alloy steel |
| CN104988299A (en) * | 2015-07-29 | 2015-10-21 | 舞阳钢铁有限责任公司 | Control method for avoiding large-thickness medium-and-high carbon steel cutting delayed cracks in winter |
| CN107267848A (en) * | 2017-05-26 | 2017-10-20 | 舞阳钢铁有限责任公司 | One kind reduces that electroslag becomes a useful person Cr Mo steel crackles and edge bursts method |
| CN108043877A (en) * | 2017-12-15 | 2018-05-18 | 苏州赛斯德工程设备有限公司 | A kind of preparation method of corrosion-resistance compound steel plate |
-
2019
- 2019-01-03 CN CN201910004458.7A patent/CN109570688A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS52149247A (en) * | 1976-06-07 | 1977-12-12 | Kobe Steel Ltd | Powder metal gas cutting method and powder metal used therefor |
| CN101716660A (en) * | 2009-11-28 | 2010-06-02 | 山西太钢不锈钢股份有限公司 | Continuous casting method of heat-resistance stainless steel for steam turbine blade |
| CN103170704A (en) * | 2013-03-16 | 2013-06-26 | 南阳汉冶特钢有限公司 | Flame cutting process of steel plate of extremely thick medium and high carbon steel and alloy steel |
| CN104988299A (en) * | 2015-07-29 | 2015-10-21 | 舞阳钢铁有限责任公司 | Control method for avoiding large-thickness medium-and-high carbon steel cutting delayed cracks in winter |
| CN107267848A (en) * | 2017-05-26 | 2017-10-20 | 舞阳钢铁有限责任公司 | One kind reduces that electroslag becomes a useful person Cr Mo steel crackles and edge bursts method |
| CN108043877A (en) * | 2017-12-15 | 2018-05-18 | 苏州赛斯德工程设备有限公司 | A kind of preparation method of corrosion-resistance compound steel plate |
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Application publication date: 20190405 |