CN108374075B - The method for controlling large-scale armour plate brake forming part quenching distortion - Google Patents
The method for controlling large-scale armour plate brake forming part quenching distortion Download PDFInfo
- Publication number
- CN108374075B CN108374075B CN201810199440.2A CN201810199440A CN108374075B CN 108374075 B CN108374075 B CN 108374075B CN 201810199440 A CN201810199440 A CN 201810199440A CN 108374075 B CN108374075 B CN 108374075B
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- China
- Prior art keywords
- junction part
- framework junction
- quenching
- armour
- lacing wire
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Classifications
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/62—Quenching devices
-
- 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
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/42—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for armour plate
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Heat Treatment Of Articles (AREA)
Abstract
The invention discloses a kind of methods for controlling large-scale armour plate brake forming part quenching distortion, comprising: connects two molding armour plates with lacing wire, is welded into framework junction part；Framework junction part is put into heating furnace to be heat-treated.The technical problem that can not be corrected present invention efficiently solves torsional deformation in large-scale armour plate quenching process.
Description
Technical field
The present invention relates to a kind of anti-deformation method of large-scale armour plate, in particular to a kind of large-scale armour plate of control is bent to
The method of type part quenching distortion.
Background technique
Currently, often having relatively large brake forming part to need quenching heat treatment in domestic manufacturing industry, External Shape is all long
Width is bigger, and has circular arc molding part at an angle in the longitudinal direction.Due to the hardness that is required after forming parts compared with
Height, this range of 360~410HB of Chang.
The major defect occurred after heat treatment is torsional deformation, and general deflection is in 7mm or more, and deformed part is because hard
Degree is high, elasticity is big and can not correct, and can not guarantee the Angular Dimension of part after quenching.Now, small formed plate armour part quenching is adopted
With in water cooling mold press quenching on quenching press, deformation has been efficiently controlled；And for the brake forming part of larger size
Quenching can only be formed using welding after first quenching.
Since part particular/special requirement plate armour part does not allow welding, and implement press quenching without so big water cooling mold,
So can not correct for the quenching distortion after large-scale armour plate brake forming, the Angular Dimension before not can guarantee quenching is asked
Topic.
Summary of the invention
Technical problem solved by the invention is to provide a kind of side for controlling large-scale armour plate brake forming part quenching distortion
Method efficiently solves torsional deformation in large-scale armour plate quenching process and the technical problem that can not correct.
Technical solution is as follows:
A method of controlling large-scale armour plate brake forming part quenching distortion, comprising:
Two molding armour plates are connected with lacing wire, are welded into framework junction part；
Framework junction part is put into heating furnace to be heat-treated.
Further, two molding armour plate horizontal directions are stood up, between keep the spacing of a part width, lacing wire
Using Q235 mild steel, top surface, bottom surface and the medial side face of two armour plates of connection of lacing wire are pushed up using upper drop-down, centre
Mode is combined into framework junction part.
Further, heat treatment step includes:
Part is smoothly put into heating furnace when quenching shove charge, is preheated at 550 DEG C, is answered with eliminating welding lacing wire bring
Power；
Framework junction part is quenched, hardening heat is 890 DEG C ± 10 DEG C, keeps the temperature 50-70min, will after the completion of quenching
Smoothly level is hung out framework junction part, and 30-40s is pre-chilled；
Framework junction part is subjected to water cooling, 20-40 DEG C of water cooling temperature, water cooling time 7-9min into the water；
Framework junction part is tempered, 200 DEG C ± 10 DEG C of tempering temperature, time 90-120min is air-cooled later.
Technical solution provided in an embodiment of the present invention can include the following benefits:
The present invention is capable of increasing the constraint of deformation direction, to control the deformation of part, efficiently solves large-scale plate armour
Torsional deformation problem in plate quenching process, it is ensured that the size and bending angle of single large-scale armour plate are constant, also meet
The matching requirements of component.The present invention has good application value, remarkable in economical benefits.
It should be understood that above general description and following detailed description be only it is exemplary and explanatory, not
It can the limitation present invention.
Detailed description of the invention
The drawings herein are incorporated into the specification and forms part of this specification, and shows and meets implementation of the invention
Example, and be used to explain the principle of the present invention together with specification.
Fig. 1 is the main view of armour plate in the present invention；
Fig. 2 is the top view of armour plate in the present invention；
Fig. 3 is the structural schematic diagram that armour plate is fixed into framework junction part.
Specific embodiment
It is described below and specific embodiments of the present invention is fully shown, to enable those skilled in the art to practice it
.
As shown in Figure 1, being the main view of armour plate in the present invention；As shown in Fig. 2, being the vertical view of armour plate in the present invention
Figure；As shown in figure 3, being the structural schematic diagram that armour plate is fixed into framework junction part.
Since the length of armour plate 1 is larger, torsional deformation can be generated in quenching process, and this torsional deformation is difficult
Correction.In the present invention, after single large-scale armour plate 1 forms, two armour plates 1 are welded together, form one frame
Structural member increases the rigidity of part, can increase the constraint of deformation direction when frame structure quenching, to control the change of part
Shape.After framework junction part heat treatment after using the natrual ageing of a period of time after, by integral frame structure part split after
To ensure the shape invariance of single armour plate 1, the matching requirements of component are met.
Framework junction part includes two armour plates 1, is welded with lacing wire 2 between two armour plates 1, lacing wire is separately connected two
Top surface, bottom surface, the side of armour plate 1.
The method for controlling large-scale armour plate brake forming part quenching distortion, the specific steps are as follows:
Step 1: two molding armour plates 1 being connected with lacing wire, are welded into framework junction part；
Two molding 1 horizontal directions of armour plate are stood up, between keep a part width spacing, lacing wire 2 use
Q235 mild steel, lacing wire 2 connect top surface, bottom surface and the medial side face of armour plate 1, are combined by the way of upper drop-down, intermediate top
At framework junction part.
Step 2: framework junction part being put into heating furnace and is heat-treated.
Step 21: part smoothly being put into heating furnace when quenching shove charge, is preheated at 550 DEG C, to eliminate welding lacing wire
Bring stress；
Step 22: framework junction part being quenched, hardening heat is 890 DEG C ± 10 DEG C, keeps the temperature 50-70min, has quenched
The stable level of framework junction part is hung out after, 30-40s is pre-chilled；
An imaginary entirety pair is changed to by that cannot be heat-treated on Quenching press after single large-scale armour plate brake forming
The frame structure of title, then integral quenching heat treatment is carried out, it can so increase the constraint of deformation direction, to control the change of part
Shape.
Step 23: framework junction part is subjected to water cooling, 20-40 DEG C of water cooling temperature, water cooling time 7-9min into the water；
Do not allow to be swung left and right after quenching water-inlet, prevents the resistance of water from making workpiece bending deformed.By part when quenching is cooling
It is pre-chilled after steadily hanging out, and control the water cooling time to effectively inhibit deformation at part bending and plane.
Step 24: framework junction part being tempered, 200 DEG C ± 10 DEG C of tempering temperature, time 90-120min, Zhi Houkong
It is cold.
By taking the long 1675mm of certain part × wide 200mm × thickness 25mm 685A armour steel bends part as an example, walked using the present invention
It is rapid as follows:
1, by after 1 brake forming of armour plate of single large size, 2 armour plates 1 are welded into the symmetrical frame of integral rigidity
Structural member, framework junction part can increase the constraint of deformation direction when carrying out integral quenching heat treatment, to control part plate armour
The deformation of plate 1.
2, quench shove charge when framework junction part is smoothly put into furnace, 550 DEG C preheating with reduce welding lacing wire and quickly
Heat bring stress；
3, heat-treatment quenching temperature is 890 DEG C ± 10 DEG C, keeps the temperature 50min, and the stable level of part is hung out pre-cooling 30-
40s subsequently into cold in 20 DEG C of water, and is tempered in time；
It is hung vertically when Quench heating into water, does not allow to be swung left and right after entering water, prevent the resistance of water from become spares bend
Shape.
3,200 DEG C ± 10 DEG C of tempering temperature, time 90min is air-cooled later；
4, after symmetrical framework junction part after natrual ageing after a period of time, framework junction part fission is taken out into armour plate
1, can so ensure the quenched hardness of armour plate 1 of single large size, but also 1 bending angle of armour plate and radian with quench
It is consistent before fire, avoid the deformation of quenching.
It should be understood that the invention is not limited to the process and structure that are described above and are shown in the accompanying drawings,
And various modifications and changes may be made without departing from the scope thereof.The scope of the present invention is only limited by the attached claims
System.
Claims (2)
1. a kind of method for controlling large-scale armour plate brake forming part quenching distortion, comprising:
Two molding armour plates are connected with lacing wire, are welded into framework junction part；Lacing wire is separately connected the top of two armour plates
Face, bottom surface, side；
Framework junction part is put into heating furnace to be heat-treated, heat treatment step smoothly puts part when including: quenching shove charge
It into heating furnace, is preheated at 550 DEG C, welds lacing wire bring stress to eliminate；Framework junction part is quenched, hardening heat
It is 890 DEG C ± 10 DEG C, keeps the temperature 50-70min, smoothly level is hung out by framework junction part after the completion of quenching, and 30-40s is pre-chilled；It will
Framework junction part carries out water cooling, 20-40 DEG C of water cooling temperature, water cooling time 7-9min into the water；Framework junction part is returned
Fire, 200 DEG C ± 10 DEG C of tempering temperature, time 90-120min is air-cooled later.
2. controlling the method for large-scale armour plate brake forming part quenching distortion as described in claim 1, it is characterised in that: by two
Molding armour plate horizontal direction is stood up, between keep a part width spacing, lacing wire use Q235 mild steel, lacing wire
The top surface, bottom surface and medial side face for connecting two armour plates are combined into framework junction part by the way of upper drop-down, intermediate top.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810199440.2A CN108374075B (en) | 2018-03-12 | 2018-03-12 | The method for controlling large-scale armour plate brake forming part quenching distortion |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810199440.2A CN108374075B (en) | 2018-03-12 | 2018-03-12 | The method for controlling large-scale armour plate brake forming part quenching distortion |
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| Publication Number | Publication Date |
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| CN108374075A CN108374075A (en) | 2018-08-07 |
| CN108374075B true CN108374075B (en) | 2019-11-15 |
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Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AU564998B2 (en) * | 1983-12-20 | 1987-09-03 | Compania Siderurgica Huachipato S.A. | Hardened and tempered high hardness special steels |
| CN102312055B (en) * | 2011-09-30 | 2013-02-27 | 沈阳黎明航空发动机(集团)有限责任公司 | Anti-deformation method of flat casting |
| CN103510017A (en) * | 2012-06-19 | 2014-01-15 | 天津世通钢铁有限责任公司 | Ultrahigh-strength light armor plate and manufacturing method thereof |
| CN102699639B (en) * | 2012-06-29 | 2015-03-25 | 北方重工集团有限公司 | Technique for integrally manufacturing semi-structure of full-face tunneling machine shield |
| CN106636598B (en) * | 2016-11-30 | 2018-09-18 | 共享铸钢有限公司 | A kind of anti-deformation process of large size low-intensity conical ring plate class steel-casting |
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