CN103170704A - Flame cutting process of steel plate of extremely thick medium and high carbon steel and alloy steel - Google Patents
Flame cutting process of steel plate of extremely thick medium and high carbon steel and alloy steel Download PDFInfo
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- CN103170704A CN103170704A CN2013100837806A CN201310083780A CN103170704A CN 103170704 A CN103170704 A CN 103170704A CN 2013100837806 A CN2013100837806 A CN 2013100837806A CN 201310083780 A CN201310083780 A CN 201310083780A CN 103170704 A CN103170704 A CN 103170704A
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Abstract
The invention discloses a flame cutting process of a steel plate of extremely thick medium and high carbon steel and alloy steel. A trolley type flame cutting machine is used, a flame cutting process with temperature and low speed is controlled, the process processing ways of preheating first and cutting later, cutting with temperature and low speed, and heat insulation after cutting are used, flaws are prevented from being generated in the flame cutting process, the quality of steel is improved comprehensively, and process requirements are specially put forward to each process step. The flame cutting process of the steel plate of the extremely thick medium and high carbon steel and the alloy steel is used, the current situation that the flaws are easy to generate after the medium and high carbon steel and the alloy steel in traditional flame cutting are cooled to a room temperature is improved, the comprehensive quality of the extremely thick medium and high carbon steel and the alloy steel is improved, the percent of pass of checking and accepting of mass production is guaranteed, waste of steel and iron resources is reduced, the industrial production cost is lowered, and huge economical and social benefits can be achieved. The flame cutting process of the steel plate of the extremely thick medium and high carbon steel and the alloy steel is small in implementation difficulty, low in cost and good in benefit, and has popularization and using value.
Description
Technical field
The invention belongs to steel plate manufacturing technology field, particularly the Flame-cutter skill of the thick middle, high-carbon of a kind of spy and steel alloy steel plate.
Background technology
Medium and high carbon steel, steel alloy easily crack after flame cutting cool to room temperature, and this crackle is because thermal stress adds the structural stress sum greater than due to the rupture strength of this material.adopt light microscope, the method of testing such as ESEM and energy spectrum analysis, steel plate cutting crackle is analyzed, result shows, the cutting cracking appears in steel plate, main in the process of being cut by oxygen, when just being equivalent to steel is heated to the heating of critical point AC3(sub-eutectoid steel, all ferrites all change austenitic temperature into) more than, after insulation with greater than the V critical cooling rate, this process has in fact been quenched steel so, cutting section middle transition process will can not occur and obtain martensite, bainite, fragility through steel after this process has also just raise, very easy strain cracking, add that hot-rolled thick plank is thick organizing of again solidifying after melting of cutting, local organization is overheated, producing the larger composite factors such as stress concentration causes.Along with the increase of steel plate thickness and hardness, cutting edge section the crackle tendency occurs and strengthens, therefore special thick middle, high-carbon and steel alloy are (for example: the steel grade of C content 〉=0.30%: carbon constructional quality steel 35#, 45#, 50#; Structural alloy steel 40Cr, 50Cr, plastic die steel P20, S45C, S50C) must prevent that when cutting steel plate from cutting the generation of crackle.CN102528210 A discloses a kind of torch-flame cutting process for super-thick steel plates, it is characterized in that: it adopts flame cutting machine to carry out the flame cutting to super-thick steel plate; Steel plate to be cut is placed on NC flame cutting machine, and it is vertical that surface of steel plate to be cut and cutting of NC flame cutting machine are chewed, and cutting the height of chewing distance surface of steel plate to be cut is 10～30mm; Set cutting speed, preheating time, preheat oxygen pressure, cutting oxygen pressure and propane pressure, cutting speed increases with steel plate thickness size to be cut and reduces, cutting speed is 200～60mm/min, be 40s～80s preheating time, preheat oxygen pressure is 0.3～0.6Mpa, cutting oxygen pressure is 1～1.6Mpa, and propane pressure is 0.1～0.16Mpa; Meet at right angles the place as playing cutpoint with surface of steel plate to be cut and side, adjustment is cut and is chewed flame intensity, the length of secondary flame is reached bottom steel plate to be cut, rise cut before in the cut point preheating, after reaching the preheating time of setting, open cutting oxygen, when slag trickles downwards along the edge, move forward to cut and chew, when slag is discharged from the bottom, accelerate the cutting torch translational speed to normal cutting operation.Described torch-flame cutting process for super-thick steel plates is a kind of a kind of more advanced representative processes of traditional flame cutting, but described technique has obvious defective, steel plate after the cutting of described Flame-cutter skill in the cool to room temperature process because cooling raio is rapider, must easily crack, can cause defect rate higher, therefore still need propose a kind of new Flame-cutter skill, to realize controlling the flow process of whole flame cutting, accomplish the end in view.
Summary of the invention
The object of the invention is to address the above problem, the Flame-cutter skill of the thick middle, high-carbon of a kind of spy and steel alloy steel plate is provided, can cut special thick middle, high-carbon and the steel alloy of 50～300mm, and can effectively prevent from cracking in the flame cutting process, improve steel product quality.
The present invention is based on special thick middle, high-carbon and steel alloy flame cutting crackle mechanism of production, the measure that proposition is optimized traditional flame cutting flow process, the technical scheme that adopts is: the Flame-cutter skill of the thick middle, high-carbon of a kind of spy and steel alloy steel plate, adopt cart type torch-cutting machine, it is characterized in that: after first preheating the cutting, with warm low speed cutting and the cutting after the insulation the PROCESS FOR TREATMENT mode, prevent from cracking in the flame cutting process, comprehensively improve steel product quality.
The described flame cutting flow process that the present invention takes is as follows: cart type torch-cutting machine is placed on the thick middle, high-carbon of spy to be cut and steel alloy steel plate, according to described steel plate thickness value, cutting parameter is set, it is vertical with described surface of steel plate that the cutting of cart type torch-cutting machine chewed, cut the height of chewing apart from surface of steel plate and be set to 20～30mm, described preheat temperature is controlled at 200～300 ℃, cutting speed is controlled at 250～40mm/min, and the laggard windrow buttress slow cooling of described steel plate cutting or high tempering are processed.
Described stacking slow cooling technological requirement is: when environment temperature≤10 ℃, after the steel plate cutting, the slot position will be with heat-insulation blanket or asbestos cloth parcel, and the parcel time gap remains in 5min clipping time.
Described high-temperature tempering process requires: carry out high tempering after the steel plate cutting in tempering furnace and process, temperature is set to 530～570 ℃.
Further optimize as the present invention, when described steel plate thickness was 50～120mm, cutting speed was controlled at 250～200mm/min.
Further optimize as the present invention, when described steel plate thickness was 120～180mm, cutting speed was controlled at 200～145mm/min.
Further optimize as the present invention, when described steel plate thickness was 180～250mm, cutting speed was controlled at 145～85mm/min.
Further optimize as the present invention, when described steel plate thickness was 250～300mm, cutting speed was controlled at 85～40mm/min.
Further optimize as the present invention, when described steel plate thickness was 280～300mm, cutting speed was controlled at 65～40mm/min.
The concrete technology of each link of concrete technology flow process of the present invention requires to be analyzed as follows:
(1) steel plate preheating: according to plate quality grade and thickness of slab, pre-heating mean adopts flame to burn rifle, is mainly to carry out preheating near concentrating on cut mouthful, and it is not very large being applicable to area, can realize even preheating; The heating of electrons heat pad or heating furnace requires walking slowly in described steel plate warm, make whole steel plate interface thermally equivalent, the hot-spot phenomenon occurs with the zone of contact-free thermal source; For determining the steel plate pre-heat effect, should be temperature required in the test of hot spot quilt cover.
When temperature 〉=15 ℃, steel billet temperature during cutting＞100 ℃; Temperature＜5 ℃, steel billet temperature during cutting＞150 ℃; 5 ℃＜temperature≤15 ℃, steel billet temperature during cutting＞120 ℃; Show according to test data, if reach desirable pre-heat effect, described steel plate can directly carry out the flame cutting.
(2) be with warm low speed cutting: if can't carry out whole plate preheating, adopt local preheating, then use described low speed cutting method to prevent from cutting crackle, refer to than the low speed cutting of other class steel plates of stack pile here.First cutting belt is carried out preheating several times with empty race of flame gun before the flame cutting, preheat temperature reaches 200～300 ° of C and is advisable; Its maximum cutting rate depends on steel plate grade and thickness.This step can be combined with the flame cutting method that cuts after (1) described preheating, further reduces the occurrence probability of cutting crackle.
(3) stacking slow cooling or high tempering: this processing step core is to take control measure to reduce cooling velocity, and following two kinds of forms are specifically arranged:
A: stacking slow cooling, the slow cooling meeting after the steel plate cutting effectively reduces the risk of cutting crackle.After described steel plate is cut by flame, immediately it is being carried out stacking when warm, the employing method is: use heat-insulation blanket or asbestos cloth that it is covered, stacking slow cooling requires cool to room temperature, add this and seemed usual technical scheme, can effectively reduce cooling velocity, steel plate after guaranteeing well to cut after insulation to slowly cool to room temperature less than the V critical cooling rate, avoid causing steel fragility to raise the steel quenching effect, solved well the strain cracking problem of super-thick steel plate after cutting.Particularly under the condition of temperature＜10 ℃, must 5min after the steel plate cutting with interior cutting part with heat-insulation blanket or asbestos cloth parcel, just can play and reduce the purpose that crackle produces, can be not obvious otherwise reduce the effect of crackle.
B: high tempering, for the cutting of carbon steel and steel alloy, to carry out high tempering after the steel plate cutting in tempering furnace and process, temperature is set to 530～570 ℃, can effectively eliminate the stress that cutting produces, thus prevention cutting crackle.This processing step is general only to be needed from a: stacking slow cooling or b: select one to operate effectively high tempering and increase the benefit.
The later stage quality inspection: steel plate cutting crackle belongs to the retardance crackle, steel plate thickness and hardness are larger, it is just larger that the cutting crackle appears, need to after completing 48 hours, the flame cutting check, can take the methods such as light microscope, ESEM and energy spectrum analysis to take a sample and detect analysis, this step is mainly to use for inspecting crack index in batch production by random samples, guarantees acceptable quality level, technical process is carried out the effect feedback, and follow-up work is had directive significance.
the invention has the beneficial effects as follows: the present invention is by controlling flame cutting flow process, cut after adopting first preheating, PROCESS FOR TREATMENT mode with insulation after warm low speed cutting and cutting, improved the process that adopts traditional flame cutting, obtained the effect of highly significant, thoroughly changed and adopted traditional flame cutting medium and high carbon steel, the present situation that easily cracks after cool to room temperature after steel alloy, particularly for the Insulation that cuts rear operation, avoid steel fragility to raise and strain cracking after cutting, improved special thick in, the comprehensive quality of high-carbon steel and steel alloy, through on-the-spot trial-production and check, greatly improved the batch production acceptable quality level, allow more the people is unimaginable is, by selecting rational cutting technique parameter and Insulation, can in high quality 50～300mm super-thick steel plate be cut off, guarantee that the cut surface perpendicularity is at 2.6～4.8mm, roughness Ra even is down to 25 microns, have substantial characteristics and obtained significant technological progress, adopt technical solutions according to the invention, greatly reduced the iron and steel resource waste, reduced the industrial production cost, improved the another breakthrough of domestic iron and steel process technology, can produce huge economic and social benefit.The Flame-cutter skill of the special thick middle, high-carbon of the present invention and steel alloy is implemented difficulty little, and cost is lower, and benefit is fine, has general popularizing value.
The specific embodiment
Specific embodiment 1
Cutting object of the present invention: it is that 300mm, material are the steel plate of 45# that cutting steel plate is selected thickness, cuts.
The cutting technique flow process that the present invention takes is as follows: with this parameter of 45# thickness 300mm as the trolley type cutting thickness, begin to carry out the flame cutting, cart type torch-cutting machine is placed on the 45# steel plate of 300mm, the cutting of cart type torch-cutting machine chewed with to be cut surface of steel plate vertical, cut the height of chewing apart from surface of steel plate and be set to 20mm, the setting cutting speed is 50～70mm/min, and preheat temperature is 250 ℃; Steel plate slot position 5min after cutting covers it with the interior heat-insulation blanket that uses, and stacking slow cooling is to room temperature; Placed 48 hours after cutting, adopt light microscope sampling Detection crack index.
The crack detection result of the embodiment of the present invention: do not find that crackle occurs, acceptable quality level 99.7%, the cut surface perpendicularity is at 4.6mm, and roughness Ra reaches 25 microns, has realized re-set target.
Specific embodiment 2
Cutting object of the present invention: it is that 300mm, material are the steel plate of 45# that cutting steel plate is selected thickness, cuts.
The cutting technique flow process that the present invention takes is as follows: with this parameter of 45# thickness 300mm as the trolley type cutting thickness, begin to carry out the flame cutting, cart type torch-cutting machine is placed on the 45# steel plate of 300mm, the cutting of cart type torch-cutting machine chewed with to be cut surface of steel plate vertical, cut the height of chewing apart from surface of steel plate and be set to 26～28mm, preheat temperature is 295 ℃ of left and right; The setting cutting speed is 55mm/min; Process by high tempering after the steel plate cutting, temperature is set to 555 ℃; Temperature retention time is pressed 5min/mm; Placed 50 hours after cutting, adopt light microscope sampling Detection crack index.
The crack detection result of the embodiment of the present invention: do not find that crackle occurs, acceptable quality level 100%, the cut surface perpendicularity is at 3.2mm, and roughness Ra reaches 24 microns, has realized re-set target.
Specific embodiment 3
Cutting object of the present invention: it is that 100mm, material are the steel plate of 45# that cutting steel plate is selected thickness, cuts.
The cutting technique flow process that the present invention takes is as follows: with this parameter of 45# thickness 100mm as the trolley type cutting thickness, begin to carry out the flame cutting, cart type torch-cutting machine is placed on the 45# steel plate of 100mm, only heat with preheating flame on cart type torch-cutting machine cutting starting point, the cutting of described cart type torch-cutting machine chewed with to be cut surface of steel plate vertical, cut the height of chewing apart from surface of steel plate and be set to 20～30mm, the white apex of the heart end of flame is apart from surface of steel plate 1.5～2.5mm, preheat temperature is 260 ℃ of left and right, and the setting cutting speed is 220mm/min; Process by high tempering after the steel plate cutting, temperature is set to 560 ℃; Temperature retention time is pressed 5min/mm; Place after cutting after 48 hours, adopt light microscope sampling Detection crack index.
The crack detection result of the embodiment of the present invention: do not find that crackle occurs, acceptable quality level 99.8%, the cut surface perpendicularity is at 4.8mm, and roughness Ra reaches 25 microns, has realized re-set target.
Specific embodiment 4
Cutting object of the present invention: it is that 100mm, material are the steel plate of 45# that cutting steel plate is selected thickness, cuts.
The cutting technique flow process that the present invention takes is as follows: with this parameter of 45# thickness 100mm as the trolley type cutting thickness, begin to carry out the flame cutting, cart type torch-cutting machine is placed on the 45# steel plate of 100mm, only heat with preheating flame on cart type torch-cutting machine cutting starting point, the cutting of described cart type torch-cutting machine chewed with to be cut surface of steel plate vertical, cut the height of chewing apart from surface of steel plate and be set to the 25mm left and right, the white apex of the heart end of flame is apart from about surface of steel plate 2.0mm, preheat temperature to 300 ℃; The setting cutting speed is 240mm/min; Steel plate slot position 5min after cutting carries out stacking with the interior stacking that carries out, and uses heat-insulation blanket that it is covered, and stacking slow cooling is to room temperature; Placed 72 hours after cutting, adopt light microscope sampling Detection crack index.
The crack detection result of the embodiment of the present invention: do not find that crackle occurs, acceptable quality level 100%, the cut surface perpendicularity is at 4.2mm, and roughness Ra reaches 24.5 microns, has realized re-set target.
Specific embodiment 5
Cutting object of the present invention: it is that 250mm, material are that the steel plate of structural alloy steel 40Cr cuts that cutting steel plate is selected thickness.
the cutting technique flow process that the present invention takes is as follows: with this parameter of 40Cr thickness 250mm as the trolley type cutting thickness, begin to carry out the flame cutting, cart type torch-cutting machine is placed on the structural alloy steel 40Cr steel plate of 250mm, only heat with preheating flame on cart type torch-cutting machine cutting starting point, the cutting of described cart type torch-cutting machine chewed with to be cut surface of steel plate vertical, cut the height of chewing apart from surface of steel plate and be set to 25mm, the white apex of the heart end of flame is apart from surface of steel plate 1.5～2.5mm, the setting cutting speed is 120～200mm/min, using heat-insulation blanket that stacking is carried out in its covering when warm it immediately after steel plate cutting, stacking slow cooling is to room temperature, placed 72 hours after cutting, adopt light microscope sampling Detection crack index.
The crack detection result of the embodiment of the present invention: the statistic sampling point has fine crack to occur, after mend again and survey multiple spot, the crackle occurrence rate reaches 1.5%, qualification rate 97.5%.
Specific embodiment 6
Cutting object of the present invention: it is that 250mm, material are that the steel plate of structural alloy steel 40Cr cuts that cutting steel plate is selected thickness.
The cutting technique flow process that the present invention takes is as follows: with this parameter of 40Cr thickness 250mm as the trolley type cutting thickness, begin to carry out the flame cutting, cart type torch-cutting machine is placed on the structural alloy steel 40Cr steel plate of 250mm, only heat with preheating flame on cart type torch-cutting machine cutting starting point, the cutting of described cart type torch-cutting machine chewed with to be cut surface of steel plate vertical, cut the height of chewing apart from surface of steel plate and be set to 20mm, the white apex of the heart end of flame is apart from surface of steel plate 1.5～2.0mm, the setting cutting speed is 85～100mm/min, preheat temperature to 300 ℃; After steel plate cutting in 4min with it with the warm stacking that carries out, use heat-insulation blanket that it is covered, stacking slow cooling is to room temperature; Placed 72 hours after cutting, adopt light microscope sampling Detection crack index.
The crack detection result of the embodiment of the present invention: do not find that crackle occurs, acceptable quality level 100%, the cut surface perpendicularity is at 4.0mm, and roughness Ra reaches 23.5 microns, has realized re-set target.
the present invention is by controlling flame cutting flow process, cut after adopting first preheating, PROCESS FOR TREATMENT mode with insulation after warm low speed cutting and cutting, improved the process that adopts traditional flame cutting, obtained the effect of highly significant, thoroughly changed and adopted traditional flame cutting medium and high carbon steel, the present situation that easily cracks after cool to room temperature after steel alloy, particularly for the Insulation that cuts rear operation, avoid steel fragility to raise and strain cracking after cutting, improved special thick in, the comprehensive quality of high-carbon steel and steel alloy, through on-the-spot trial-production and check, greatly improved the batch production acceptable quality level, allow more the people is unimaginable is, by selecting rational cutting technique parameter and Insulation, can in high quality 50～300mm super-thick steel plate be cut off, guarantee that the cut surface perpendicularity is at 2.2～4.8mm, roughness Ra even is down to 25 microns, have substantial characteristics and obtained significant technological progress, adopt technical solutions according to the invention, greatly reduced the iron and steel resource waste, reduced the industrial production cost, improved the another breakthrough of domestic iron and steel process technology, can produce huge economic and social benefit.The Flame-cutter skill of the special thick middle, high-carbon of the present invention and steel alloy is implemented difficulty little, and cost is lower, and benefit is fine, has general popularizing value.
Enforcement recited above is the unrestricted technical scheme of the present invention in order to explanation only, under the prerequisite that does not break away from design philosophy of the present invention, the any modification or partial replacement that those skilled in the art make the technical program all should be encompassed in the middle of claim scope of the present invention.
Claims (8)
- a spy thick in, the Flame-cutter skill of high-carbon steel and steel alloy steel plate, adopt cart type torch-cutting machine, it is characterized in that: cut after first preheating, PROCESS FOR TREATMENT mode with insulation after warm low speed cutting and cutting, cart type torch-cutting machine be placed into spy to be cut thick in, on high-carbon steel and steel alloy steel plate, according to described steel plate thickness value, cutting parameter is set, it is vertical with described surface of steel plate that the cutting of cart type torch-cutting machine chewed, cut the height of chewing apart from surface of steel plate and be set to 20～30mm, described preheat temperature is controlled at 200～300 ℃, cutting speed is controlled at 250～40mm/min, the laggard windrow buttress slow cooling of described steel plate cutting or high tempering are processed.
- 2. the Flame-cutter skill of special thick middle, high-carbon and steel alloy steel plate as claimed in claim 1, it is characterized in that: when environment temperature≤10 ℃, after the steel plate cutting, the slot position will with heat-insulation blanket or asbestos cloth parcel, be wrapped up time gap and remain in 5min clipping time.
- 3. the Flame-cutter skill of special thick middle, high-carbon and steel alloy steel plate as claimed in claim 1, it is characterized in that: carry out high tempering after the steel plate cutting in tempering furnace and process, temperature is set to 530～570 ℃.
- 4. the Flame-cutter skill of the thick middle, high-carbon of spy and steel alloy steel plate as described in as arbitrary in claim 1-3, it is characterized in that: when described steel plate thickness was 50～120mm, cutting speed was controlled at 250～200mm/min.
- 5. the Flame-cutter skill of the thick middle, high-carbon of spy and steel alloy steel plate as described in as arbitrary in claim 1-3, it is characterized in that: when described steel plate thickness was 120～180mm, cutting speed was controlled at 200～145mm/min.
- 6. the Flame-cutter skill of the thick middle, high-carbon of spy and steel alloy steel plate as described in as arbitrary in claim 1-3, it is characterized in that: when described steel plate thickness was 180～250mm, cutting speed was controlled at 145～85mm/min.
- 7. the Flame-cutter skill of the thick middle, high-carbon of spy and steel alloy steel plate as described in as arbitrary in claim 1-3, it is characterized in that: when described steel plate thickness was 250～300mm, cutting speed was controlled at 85～40mm/min.
- 8. the Flame-cutter skill of the thick middle, high-carbon of spy and steel alloy steel plate as described in as arbitrary in claim 1-3, it is characterized in that: when described steel plate thickness was 280～300mm, cutting speed was controlled at 65～40mm/min.
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Cited By (9)
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| CN105834548A (en) * | 2016-06-07 | 2016-08-10 | 南京钢铁股份有限公司 | Flame cutting technology for thick steel plates |
| CN106825844A (en) * | 2017-03-10 | 2017-06-13 | 郑州煤矿机械集团股份有限公司 | The elongated cage bar groove method for hot cutting of hydraulic support for low coal seam back timber |
| CN107214427A (en) * | 2017-05-16 | 2017-09-29 | 合肥市瀚坤机械有限公司 | One kind takes door frame welding procedure |
| CN109570688A (en) * | 2019-01-03 | 2019-04-05 | 南京钢铁股份有限公司 | A kind of method of gas flame cuttiug carbon steel blank |
| CN111168192A (en) * | 2020-02-20 | 2020-05-19 | 新余钢铁股份有限公司 | Hot cutting method for high-hardness wear-resistant steel plate with thickness of 50-80 mm |
| CN111922639A (en) * | 2020-07-29 | 2020-11-13 | 葛家玉 | Processing method of wear-resistant easy-to-form special steel |
| CN114147434A (en) * | 2021-12-24 | 2022-03-08 | 舞阳钢铁有限责任公司 | Method for improving cutting quality of medium and high carbon steel of ultra-thick plate |
| CN114682876A (en) * | 2022-02-25 | 2022-07-01 | 舞阳钢铁有限责任公司 | Production method for improving cutting quality of large-thickness alloy steel plate |
| CN114850618A (en) * | 2022-05-31 | 2022-08-05 | 宝武集团鄂城钢铁有限公司 | Cutting method for reducing edge cracks of steel plate |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105834548A (en) * | 2016-06-07 | 2016-08-10 | 南京钢铁股份有限公司 | Flame cutting technology for thick steel plates |
| CN105834548B (en) * | 2016-06-07 | 2018-02-02 | 南京钢铁股份有限公司 | A kind of gas flame cuttiug technique of steel plate |
| CN106825844A (en) * | 2017-03-10 | 2017-06-13 | 郑州煤矿机械集团股份有限公司 | The elongated cage bar groove method for hot cutting of hydraulic support for low coal seam back timber |
| CN107214427A (en) * | 2017-05-16 | 2017-09-29 | 合肥市瀚坤机械有限公司 | One kind takes door frame welding procedure |
| CN109570688A (en) * | 2019-01-03 | 2019-04-05 | 南京钢铁股份有限公司 | A kind of method of gas flame cuttiug carbon steel blank |
| CN111168192A (en) * | 2020-02-20 | 2020-05-19 | 新余钢铁股份有限公司 | Hot cutting method for high-hardness wear-resistant steel plate with thickness of 50-80 mm |
| CN111168192B (en) * | 2020-02-20 | 2021-04-27 | 新余钢铁股份有限公司 | Hot cutting method for high-hardness wear-resistant steel plate with thickness of 50-80 mm |
| CN111922639A (en) * | 2020-07-29 | 2020-11-13 | 葛家玉 | Processing method of wear-resistant easy-to-form special steel |
| CN114147434A (en) * | 2021-12-24 | 2022-03-08 | 舞阳钢铁有限责任公司 | Method for improving cutting quality of medium and high carbon steel of ultra-thick plate |
| CN114682876A (en) * | 2022-02-25 | 2022-07-01 | 舞阳钢铁有限责任公司 | Production method for improving cutting quality of large-thickness alloy steel plate |
| CN114850618A (en) * | 2022-05-31 | 2022-08-05 | 宝武集团鄂城钢铁有限公司 | Cutting method for reducing edge cracks of steel plate |
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| CN103170704B (en) | 2016-10-12 |
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