CN103042070A - Method for controlling strength distribution during high-strength steel pipe hot forming - Google Patents
Method for controlling strength distribution during high-strength steel pipe hot forming Download PDFInfo
- Publication number
- CN103042070A CN103042070A CN2012105933326A CN201210593332A CN103042070A CN 103042070 A CN103042070 A CN 103042070A CN 2012105933326 A CN2012105933326 A CN 2012105933326A CN 201210593332 A CN201210593332 A CN 201210593332A CN 103042070 A CN103042070 A CN 103042070A
- Authority
- CN
- China
- Prior art keywords
- strength
- requirement
- strength steel
- steel pipe
- heating
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Landscapes
- Heat Treatment Of Articles (AREA)
Abstract
The invention relates to a high-strength steel pipe hot forming method, in particular to a method for controlling the strength distribution during high-strength steel pipe hot forming and solves problems that boron steel blanks of various types and thicknesses deform after welding, materials in welding positions change abruptly easily, and accordingly, the strength distribution of formed components cannot reach requirements. The method comprises the steps as follows: step one, placing a high-strength steel pipe blank to be formed into a heater, and performing zone control on a first zone, a second zone and a third zone corresponding to the heater by adopting same or different heating temperatures and different or same heating times; step two, transferring the heated high-strength steel pipe blank to a forming die in three seconds to five seconds, closing the forming die rapidly, and forming the high-strength steel pipe blank in one second or three seconds; step three, keeping the forming die to be closed, feeding cold water into a cooling hole in the forming die to reduce the temperature of the forming die, and quenching; and step four, after quenching, opening the forming die, and taking out the obtained high-strength steel pipe component. The method is applicable to high-strength steel pipe hot forming.
Description
Technical field
The present invention relates to a kind of thermo shaping method of high-strength steel pipe fitting, the method for control high strength steel pipe spare intensity distribution when being specifically related to a kind of hot forming.
Background technology
In industries such as aerospace field and automobile makings, the lightweight of structure has become one of most important target.The light-weighted main path of implementation structure, the one, carry out the structural optimization design, utilize member complicated, that whole member replaces in the past split shaping, assembly welding; The 2nd, adopt the high light materials of specific strength such as aluminium alloy, magnesium alloy, utilize the material of equal in quality that higher intensity is provided.
In auto manufacturing, along with the requirement to loss of weight is day by day urgent, a collection of high-intensity steel are developed, such as two-phase (DP) steel, phase-change induced plastic (TRIP) steel, martensite (M) steel, complex phase (CP) steel, hot forming (HF) steel, twin crystal inducing plasticity (TWIP) steel and hot forming (HF) steel, the tensile strength that these material formed therebies go out part is higher than common steel far away, so materials also can be described as light material.The hot forming steel is a kind of martensitic steel of hardenable one-tenth of boracic, claims again boron steel.Make the blank complete austenitizing by heating before being shaped, then Quick-forming and quenching obtain whole martensitic structures in cold mould, and intensity can reach 1500MPa even higher.Present domestic boron steel is take the BR1500HS of Baosteel production as representative, and the external corresponding trade mark is 22MnB5.
In actual application, requiring the high-intensity while of part, require its integral body or part to have enough plasticity or toughness toward contact, to satisfy the requirement of the aspects such as collision, connection.In the past, can be by the method for laser assembly solder, the blank of variety classes, different-thickness is welded together then distortion, to obtain the part of reasonable intensity distribution.But because the welding of foreign material difficulty relatively, undergo mutation at the thickness of weld material etc. in addition, often cause the shaping difficulty of part or be shaped after the intensity distribution of part do not reach requirement.
Summary of the invention
The objective of the invention is to weld together the tubing that then is out of shape to obtain reasonable intensity distribution for the boron steel blank that solves variety classes, different-thickness, exist the thickness of weld material easily to undergo mutation, cause the shaping difficulty of part or be shaped after the intensity distribution of part do not reach the problem of requirement, and the method for control intensity distribution when a kind of high-strength steel tubing hot forming is provided.
Method of the present invention realizes by following steps:
Step 1, high-strength steel pipe to be formed is put into heater, the high-strength steel pipe is divided into several zones along its length, several zones are respectively a district, He San district, two districts, the district that heater is corresponding, He San district, two districts adopt similar and different heating-up temperature to carry out subregion control, and the district that heater is corresponding, He San district, two districts adopt and carry out subregion control similar and different heat time heating time;
Step 3, keep shaping dies closed, pass into cooling water in the Cooling Holes on the shaping dies and reduce its temperature, make the cooling of high-strength steel tubing part fast cooling realize quenching;
Step 4, finish wait quenching after, open shaping dies, take out gained intensity adjustable high-strength steel tubing part.
The present invention compared with prior art has following effect:
One, the present invention makes the austenitizing degree of zones of different pipe different by the zones of different on the high-strength steel pipe 1 being carried out subregion control heating, thereby realizes control and adjusting to high-strength steel tubing part 7 intensity after the final shaping.Because Temperature Distribution has certain gradient, the performance sudden change of traditional butt welding method has not been avoided in the yet mild transition that distributes of final part strength so that the austenitizing degree can not be suddenlyd change, and can make high-strength pipe plate part 7 obtain reasonable intensity distribution.Two, shaping has the high-strength steel tubing part that intensity adjustable distributes, and only needs make its austenitizing degree different by controlling heating-up temperature and the heat time heating time of high-strength steel pipe zones of different, and the tissue that obtains after the shaping is also different with intensity, and technique is simpler.The cooling velocity of zones of different when three, the present invention need not to control die quenching, mould structure is simpler, and cost is low.
Description of drawings
Fig. 1 is the heating process schematic diagram of step 1 in the specific embodiment one; Fig. 2 is the process schematic diagram that step 2 high-strength steel pipe 1 is transferred to shaping dies 3 in the specific embodiment one from heater 2; Fig. 3 be in the specific embodiment one step 3 to high-strength steel pipe 1 be shaped, the quenching process schematic diagram; Fig. 4 is the implementation process schematic diagram of step 1 a in the specific embodiment ten.
The specific embodiment
The specific embodiment one: the performing step that specifies present embodiment in conjunction with Fig. 1～Fig. 3:
Step 1, high-strength steel pipe 1 to be formed is put into heater 2, high-strength steel pipe 1 is divided into several zones along its length, several zones are respectively a district A, two districts B He San district C, one district A of heater 2 correspondences, two districts B He San district C adopt similar and different heating-up temperature to carry out subregion control, and a district A of heater 2 correspondences, two districts B He San district C adopt and carry out subregion control similar and different heat time heating time;
Step 3, keep shaping dies 3 closures, pass into cooling water in the Cooling Holes 4 on the shaping dies 3 and reduce its temperature, make the cooling of high-strength steel tubing part 7 fast coolings realize quenching;
Step 4, finish wait quenching after, open shaping dies 3, take out gained intensity adjustable high-strength steel tubing part 7.
High-strength steel pipe 1 adopts boron steel, and the intensity after 1 hot forming of high-strength steel pipe mainly determines that by its martensitic content martensite content is higher, and intensity is also higher.The present invention is higher for the temperature that requires the high zone heating of tubing requirement of strength after being shaped, and to realize the blank complete austenitizing, the tissue that obtains after the shaping is martensite all, and intensity is higher; Require the low regional heating-up temperature of tubing requirement of strength lower for after being shaped, it is organized austenitizing does not occur or austenitizing is incomplete, the tissue that obtains after the shaping does not have martensite or only has a small amount of martensite, and intensity is lower.The present invention is initial austenite degree before the shaping that changes material just, by heating-up temperature and the heat time heating time of zones of different on the control pipe, make zones of different austenitizing degree different, the martensite content of zones of different is also different after quenching, and reaches the purpose that the final tubing part strength of control distributes.The division in the zone that the zone that requirement of strength is high and requirement of strength are low is to divide according to the needs of part.
The specific embodiment two: present embodiment is described in conjunction with Fig. 1, one district A of heater 2 correspondences in the step 1 of present embodiment, two districts B He San district C adopt and carry out subregion control different heating-up temperature, identical heat time heating times, utilize thermocouple 5 to measure respectively the temperature of high-strength steel pipe 1 Shang Yi district A, two districts B He San district C, the zone that requirement of strength is high is heated to 850 ℃～1000 ℃, the zone that requirement of strength is low is heated to 700 ℃～850 ℃, is 3min～6min the regional heat time heating time that the zone that requirement of strength is high and requirement of strength are low.In the present embodiment, the heating-up temperature by zones of different on the control high-strength steel pipe 1 is to obtain different austenitizing degree.Only needing during enforcement that heater 2 is carried out the subregion temperature control can achieve the above object, and method is simple.Other step is identical with the specific embodiment one.
The specific embodiment three: present embodiment is described in conjunction with Fig. 1, the regional heating-up temperature that the high regional heating-up temperature of high-strength steel pipe 1 requirement of strength is 900 ℃, requirement of strength is low in the step 1 of present embodiment is 750 ℃, is 5min the regional heat time heating time that the zone that requirement of strength is high and requirement of strength are low.In the present embodiment, the heating-up temperature by zones of different on the control high-strength steel pipe 1 is to obtain different austenitizing degree.Only needing during enforcement that heater 2 is carried out the subregion temperature control can achieve the above object, and method is simple.Other step is identical with the specific embodiment two.
The specific embodiment four: present embodiment is described in conjunction with Fig. 1, the regional heating-up temperature that the high regional heating-up temperature of high-strength steel pipe 1 requirement of strength is 950 ℃, requirement of strength is low in the step 1 of present embodiment is 800 ℃, is 4min the regional heat time heating time that the zone that requirement of strength is high and requirement of strength are low.In the present embodiment, the heating-up temperature by zones of different on the control high-strength steel pipe 1 is to obtain different austenitizing degree.Only needing during enforcement that heater 2 is carried out the subregion temperature control can achieve the above object, and method is simple.Other step is identical with the specific embodiment two.
The specific embodiment five: present embodiment is described in conjunction with Fig. 1, one district A of heater 2 correspondences in the step 1 of present embodiment, two districts B He San district C adopt and carry out subregion control identical heating-up temperature, different heat time heating times, high-strength steel pipe 1 requirement of strength in the step 1 is that 3min～5min, requirement of strength low regional heat time heating time is 1min～3min high regional heat time heating time, and the regional heating-up temperature that the zone that requirement of strength is high and requirement of strength are low is 850 ℃～1000 ℃.In the present embodiment, because austenitizing needs certain hour, control the time of austenitizing by the control temperature retention time, make high-strength steel pipe 1 each regional austenitizing degree different, different finally by the tissue that obtains behind the die quenching, each field strength of part is also different, and method is simple.And because the final heating-up temperature in high-strength steel pipe 1 each zone is identical, so each drape forming performance is identical.Other step is identical with the specific embodiment one.
The specific embodiment six: present embodiment is described in conjunction with Fig. 1, high-strength steel pipe 1 requirement of strength in the step 1 of present embodiment is that 4min, requirement of strength low regional heat time heating time is 2min high regional heat time heating time, and the regional heating-up temperature that the zone that requirement of strength is high and requirement of strength are low is 900 ℃.In the present embodiment, because austenitizing needs certain hour, control the time of austenitizing by the control temperature retention time, make high-strength steel pipe 1 each regional austenitizing degree different, different finally by the tissue that obtains behind the die quenching, each field strength of part is also different, and method is simple.And because the final heating-up temperature in high-strength steel pipe 1 each zone is identical, so each drape forming performance is identical.Other step is identical with the specific embodiment five.
The specific embodiment seven: present embodiment is described in conjunction with Fig. 1, high-strength steel pipe 1 requirement of strength in the step 1 of present embodiment is that 5min, requirement of strength low regional heat time heating time is 2min high regional heat time heating time, and the regional heating-up temperature that the zone that requirement of strength is high and requirement of strength are low is 950 ℃.In the present embodiment, because austenitizing needs certain hour, control the time of austenitizing by the control temperature retention time, make high-strength steel pipe 1 each regional austenitizing degree different, different finally by the tissue that obtains behind the die quenching, each field strength of part is also different, and method is simple.And because the final heating-up temperature in high-strength steel pipe 1 each zone is identical, so each drape forming performance is identical.Other step is identical with the specific embodiment five.
The specific embodiment eight: in conjunction with Fig. 2 and Fig. 3 present embodiment is described, in whole forming process, passes into the temperature that cooling water makes shaping dies 3 always in the shaping dies 3 and remain on 20 ℃～50 ℃ in the step 3 of present embodiment.Shaping dies 3 is in lower and basicly stable temperature all the time, in forming process each time, after high-strength steel pipe 1 is put in the shaping dies 3, in the process that matched moulds is shaped and quenches fast, therefore the forming temperature of high-strength steel pipe 1 and Cooling Quenching speed are substantially constant, can guarantee the uniformity of the geomery of final formation of parts and mechanical property etc.Other step is identical with the specific embodiment one.
The specific embodiment nine: present embodiment is described in conjunction with Fig. 2 and Fig. 3, present embodiment is in step 2, the initial temperature of shaping dies 3 is 100 ℃～200 ℃, in step 3, pass into cooling water in the Cooling Holes 4 on the shaping dies 3, the temperature that makes shaping dies 3 is with the Speed Reduction of 30 ℃/s～100 ℃/s, in step 4, when the temperature of mould 3 to be formed is down to 250 ℃, stop to pass into cooling water.In step 2 in the forming process of high-strength steel pipe 1, shaping dies 3 is in tepid state and its temperature along with the carrying out that is shaped slightly rises.High-strength steel pipe 1 forming property under tepid state is better, can realize the shaping of complicated shape part, and resilience is little after being shaped.The temperature that it may be noted that high-strength steel pipe 1 when step 2 finishes need to be higher than the critical hardening temperature, otherwise can affect the quenching strengthening effect of high-strength steel pipe 1 in the step 3.In step 4, the temperature of shaping dies 3 is down to 250 ℃ and is namely stopped to pass into cooling water, and shaping dies 3 was in thermal condition when this can guarantee to be shaped on the one hand next time, had also shortened in addition whole curring time.Other step is identical with the specific embodiment one.
The specific embodiment ten: present embodiment is described in conjunction with Fig. 4, present embodiment is after step 1 is finished, before step 2, increase step 1 a, the region division local cooling device 6 that requirement of strength is low on high-strength steel pipe 1, in the process of heating, to this area spray water smoke or liquid nitrogen, make this regional temperature remain on 700 ℃～850 ℃ by local cooling device 6.In the present embodiment, adopt water smoke as cooling medium, can make the local temperature fast-descending on the high strength steel pipe base 1, realize larger thermograde; Adopt liquid nitrogen as cooling medium, in effective cooling, nitrogen also can play the effect of protective atmosphere, prevents the pipe surface oxidation.Other step is identical with the specific embodiment one.
Claims (10)
1. the method for high-strength steel tubing hot forming time control intensity distribution, it is characterized in that: described method realizes by following steps:
Step 1, high-strength steel pipe (1) to be formed is put into heater (2), high-strength steel pipe (1) is divided into several zones along its length, several zones are respectively a district (A), He San districts, two districts (B) (C), the district (A) that heater (2) is corresponding, He San districts, two districts (B) (C) adopt similar and different heating-up temperature to carry out subregion control, the district (A) that heater (2) is corresponding, He San districts, two districts (B) (C) adopt and carry out subregion control similar and different heat time heating time;
Step 2, the high-strength steel pipe (1) after will heating were transferred to rapidly in 3～5 seconds in the shaping dies (3), and quick-make shaping dies (3) was also finished high-strength steel pipe (1) and is shaped in 1～3 second;
Step 3, keep shaping dies (3) closure, pass into cooling water in the Cooling Holes (4) on the shaping dies (3) and reduce its temperature, make the cooling of high-strength steel tubing part (7) fast cooling realize quenching;
Step 4, finish wait quenching after, open shaping dies (3), take out gained intensity adjustable high-strength steel tubing part (7).
2. the method for described a kind of high-strength steel tubing hot forming time control intensity distribution according to claim 1, it is characterized in that: the district (A) that the heater in the described step 1 (2) is corresponding, He San districts, two districts (B) (C) adopt different heating-up temperatures, carry out subregion control identical heat time heating time, utilize thermocouple (5) to measure respectively high-strength steel pipe (1) Shang Yi district (A), the temperature in He San districts, two districts (B) (C), the zone that requirement of strength is high is heated to 850 ℃～1000 ℃, the zone that requirement of strength is low is heated to 700 ℃～850 ℃, is 3min～6min the regional heat time heating time that the zone that requirement of strength is high and requirement of strength are low.
3. the method for described a kind of high-strength steel tubing hot forming time control intensity distribution according to claim 2, it is characterized in that: the regional heating-up temperature that the high regional heating-up temperature of high-strength steel pipe (1) requirement of strength is 900 ℃, requirement of strength is low in the described step 1 is 750 ℃, is 5min the regional heat time heating time that the zone that requirement of strength is high and requirement of strength are low.
4. the method for described a kind of high-strength steel tubing hot forming time control intensity distribution according to claim 2, it is characterized in that: the regional heating-up temperature that the high regional heating-up temperature of high-strength steel pipe (1) requirement of strength is 950 ℃, requirement of strength is low in the described step 1 is 800 ℃, is 4min the regional heat time heating time that the zone that requirement of strength is high and requirement of strength are low.
5. the method for described a kind of high-strength steel tubing hot forming time control intensity distribution according to claim 1, it is characterized in that: the district (A) that the heater in the described step 1 (2) is corresponding, He San districts, two districts (B) (C) adopt identical heating-up temperature, carry out subregion control different heat time heating times, be 3min～5min high-strength steel pipe (1) the requirement of strength high regional heat time heating time in the step 1, be 1min～3min the regional heat time heating time that requirement of strength is low, and the regional heating-up temperature that the zone that requirement of strength is high and requirement of strength are low is 850 ℃～1000 ℃.
6. the method for described a kind of high-strength steel tubing hot forming time control intensity distribution according to claim 5, it is characterized in that: high-strength steel pipe (1) requirement of strength in the described step 1 is that 4min, requirement of strength low regional heat time heating time is 2min high regional heat time heating time, and the regional heating-up temperature that the zone that requirement of strength is high and requirement of strength are low is 900 ℃.
7. the method for described a kind of high-strength steel tubing hot forming time control intensity distribution according to claim 5, it is characterized in that: high-strength steel pipe (1) requirement of strength in the described step 1 is that 5min, requirement of strength low regional heat time heating time is 2min high regional heat time heating time, and the regional heating-up temperature that the zone that requirement of strength is high and requirement of strength are low is 950 ℃.
8. the method for described a kind of high-strength steel tubing hot forming time control intensity distribution according to claim 1, it is characterized in that: in whole forming process, pass into the temperature that cooling water makes shaping dies (3) always in the shaping dies (3) and remain on 20 ℃～50 ℃ in the described step 3.
9. the method for described a kind of high-strength steel tubing hot forming time control intensity distribution according to claim 1, it is characterized in that: in step 2, the initial temperature of shaping dies (3) is 100 ℃～200 ℃, in step 3, pass into cooling water in the Cooling Holes (4) on the shaping dies (3), the temperature that makes shaping dies (3) is with the Speed Reduction of 30 ℃/s～100 ℃/s, in step 4, when the temperature of mould to be formed (3) is down to 250 ℃, stop to pass into cooling water.
10. the method for described a kind of high-strength steel tubing hot forming time control intensity distribution according to claim 1, it is characterized in that: after step 1 is finished, before step 2, increase step 1 a, at the upper low region division local cooling device (6) of requirement of strength of high-strength steel pipe (1), in the process of heating, to this area spray water smoke or liquid nitrogen, make this regional temperature remain on 700 ℃～850 ℃ by local cooling device (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012105933326A CN103042070A (en) | 2012-12-31 | 2012-12-31 | Method for controlling strength distribution during high-strength steel pipe hot forming |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012105933326A CN103042070A (en) | 2012-12-31 | 2012-12-31 | Method for controlling strength distribution during high-strength steel pipe hot forming |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103042070A true CN103042070A (en) | 2013-04-17 |
Family
ID=48055064
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012105933326A Pending CN103042070A (en) | 2012-12-31 | 2012-12-31 | Method for controlling strength distribution during high-strength steel pipe hot forming |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103042070A (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103233109A (en) * | 2013-05-13 | 2013-08-07 | 武汉钢铁(集团)公司 | Control method and device for hot-forming plasticity distribution of high-strength steel |
| CN103785760A (en) * | 2014-01-28 | 2014-05-14 | 无锡红弦汽车轻量化科技有限公司 | Pressure cooling process of segmented reinforcing type parts of hot forming steel pipe, and pressing machine hydraulic ejector rod devices |
| CN103785761A (en) * | 2014-01-28 | 2014-05-14 | 无锡红弦汽车轻量化科技有限公司 | Pressure cooling process of segmented reinforcing type parts of hot forming steel pipe, and die servo device |
| CN103817194A (en) * | 2014-01-28 | 2014-05-28 | 无锡红弦汽车轻量化科技有限公司 | Pressure cooling process for thermally-formed steel plate sectionally-strengthen-type parts and die servo device |
| CN104942109A (en) * | 2015-07-01 | 2015-09-30 | 上海凌云汽车模具有限公司 | Method and device for producing variable-strength heat forming part |
| CN112327970A (en) * | 2020-09-04 | 2021-02-05 | 凌云工业股份有限公司 | Control method for transition region strength of hot-forming variable-strength workpiece |
| CN112642916A (en) * | 2020-12-01 | 2021-04-13 | 北京星航机电装备有限公司 | Integrated forming die and forming method for large-reducing-ratio special-shaped titanium alloy thin-wall part |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2004106573A1 (en) * | 2003-05-28 | 2004-12-09 | Sumitomo Metal Industries, Ltd. | Method for hot forming and hot formed member |
| CN101280352A (en) * | 2008-05-21 | 2008-10-08 | 钢铁研究总院 | High-safe high-precision producing method of thermoforming martensitic steel parts |
| CN101439382A (en) * | 2008-12-30 | 2009-05-27 | 山东大学 | Thermal punch forming technique and forming mold for super-strength steel |
| CN101717850A (en) * | 2009-12-14 | 2010-06-02 | 山东大学 | Thermal treatment splicing process for ultra-high strength steel plate before stamping and device thereof |
| US20110303330A1 (en) * | 2010-06-11 | 2011-12-15 | Toyoda Iron Works Co., Ltd. | Steel sheet heating device, method for producing press-formed part, and press-formed part |
| CN202213187U (en) * | 2011-08-20 | 2012-05-09 | 苏州敏喆机械有限公司 | Sectionally-heating device for screw extruder screw and sleeve |
-
2012
- 2012-12-31 CN CN2012105933326A patent/CN103042070A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2004106573A1 (en) * | 2003-05-28 | 2004-12-09 | Sumitomo Metal Industries, Ltd. | Method for hot forming and hot formed member |
| CN101280352A (en) * | 2008-05-21 | 2008-10-08 | 钢铁研究总院 | High-safe high-precision producing method of thermoforming martensitic steel parts |
| CN101439382A (en) * | 2008-12-30 | 2009-05-27 | 山东大学 | Thermal punch forming technique and forming mold for super-strength steel |
| CN101717850A (en) * | 2009-12-14 | 2010-06-02 | 山东大学 | Thermal treatment splicing process for ultra-high strength steel plate before stamping and device thereof |
| US20110303330A1 (en) * | 2010-06-11 | 2011-12-15 | Toyoda Iron Works Co., Ltd. | Steel sheet heating device, method for producing press-formed part, and press-formed part |
| CN202213187U (en) * | 2011-08-20 | 2012-05-09 | 苏州敏喆机械有限公司 | Sectionally-heating device for screw extruder screw and sleeve |
Non-Patent Citations (1)
| Title |
|---|
| 孟佳: "热冲压成形工艺参数及冷却系统的研究", 《中国优秀硕士学位论文全文数据库工程科技Ⅰ辑》, no. 9, 15 September 2012 (2012-09-15), pages 022 - 88 * |
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103233109B (en) * | 2013-05-13 | 2014-08-13 | 武汉钢铁(集团)公司 | Control method and device for hot-forming plasticity distribution of high-strength steel |
| CN103233109A (en) * | 2013-05-13 | 2013-08-07 | 武汉钢铁(集团)公司 | Control method and device for hot-forming plasticity distribution of high-strength steel |
| CN103817194B (en) * | 2014-01-28 | 2016-04-27 | 无锡红弦汽车轻量化科技有限公司 | The pressure process for cooling of thermoforming steel plate sectional strengthening class part and die servo device |
| CN103817194A (en) * | 2014-01-28 | 2014-05-28 | 无锡红弦汽车轻量化科技有限公司 | Pressure cooling process for thermally-formed steel plate sectionally-strengthen-type parts and die servo device |
| CN103785761A (en) * | 2014-01-28 | 2014-05-14 | 无锡红弦汽车轻量化科技有限公司 | Pressure cooling process of segmented reinforcing type parts of hot forming steel pipe, and die servo device |
| CN103785760A (en) * | 2014-01-28 | 2014-05-14 | 无锡红弦汽车轻量化科技有限公司 | Pressure cooling process of segmented reinforcing type parts of hot forming steel pipe, and pressing machine hydraulic ejector rod devices |
| CN103785760B (en) * | 2014-01-28 | 2016-05-04 | 无锡红弦汽车轻量化科技有限公司 | Pressure process for cooling and the press hydraulic mandril device of hot forming steel pipe segmentation strengthening class part |
| CN103785761B (en) * | 2014-01-28 | 2016-05-11 | 无锡红弦汽车轻量化科技有限公司 | Pressure process for cooling and the die servo device of hot forming steel pipe segmentation strengthening class part |
| CN104942109A (en) * | 2015-07-01 | 2015-09-30 | 上海凌云汽车模具有限公司 | Method and device for producing variable-strength heat forming part |
| CN104942109B (en) * | 2015-07-01 | 2017-03-01 | 上海凌云汽车模具有限公司 | Produce the equipment of intensity adjustable thermoforming part |
| CN112327970A (en) * | 2020-09-04 | 2021-02-05 | 凌云工业股份有限公司 | Control method for transition region strength of hot-forming variable-strength workpiece |
| CN112327970B (en) * | 2020-09-04 | 2022-04-12 | 凌云工业股份有限公司 | Control method for transition region strength of hot-forming variable-strength workpiece |
| CN112642916A (en) * | 2020-12-01 | 2021-04-13 | 北京星航机电装备有限公司 | Integrated forming die and forming method for large-reducing-ratio special-shaped titanium alloy thin-wall part |
| CN112642916B (en) * | 2020-12-01 | 2022-04-19 | 北京星航机电装备有限公司 | Integrated forming die and forming method for large-reducing-ratio special-shaped titanium alloy thin-wall part |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103042070A (en) | Method for controlling strength distribution during high-strength steel pipe hot forming | |
| CN103028645A (en) | Hot stamping forming method for variable strength distribution strong-strength steel plate part | |
| CN105358718B (en) | Method and apparatus for the steel plate member for manufacturing pressure quench | |
| US20110315281A1 (en) | Tailored Properties By Post Hot Forming Processing | |
| CN106119688B (en) | A kind of high intensity Q ＆ P steel part preparation methods of capability gradient distribution | |
| KR20140138074A (en) | System and method for hot-forming blanks | |
| CN106391805B (en) | The indirect drop stamping variable speed figuration method of steel plate | |
| CN110394609B (en) | Preparation method of variable-strength hot-formed part for automobile | |
| AU2011269680A1 (en) | Tailored properties by post hot forming processing | |
| KR101277874B1 (en) | Hot forming parts having strength distribution and method for manufacturing the same | |
| KR102006963B1 (en) | Method for producing a component by hot-forming a steel precursor product | |
| CN106424280B (en) | A kind of high-strength steel hot forming differentiation mechanical property distribution flexible control method | |
| CN103878237A (en) | Method for machining high-strength steel hot stamping formed parts | |
| CN106457337A (en) | Method for producing hot-formed components | |
| CN107530757A (en) | Laser sintered die surface for instrument | |
| RU2014143828A (en) | METHOD FOR PRODUCING A STRUCTURAL ELEMENT FROM STEEL BY HOT FORMING | |
| JP5237573B2 (en) | Aluminum alloy sheet, sheet, and method for producing molded member | |
| CN104831020A (en) | Method for stamping quenching molding in non-uniform temperature field | |
| CN102994737A (en) | Method for adjusting strength distribution of parts during forming of high-strength steel material | |
| CN102389917A (en) | Thermoforming method of metal composite board | |
| CN105436275A (en) | Hot-stamping forming process of low-carbon boron alloy steel automobile reinforcing plate | |
| CN111229905B (en) | Hot stamping and quenching integrated processing method based on hydraulic forming device | |
| KR101482336B1 (en) | Method for manufacturing hot forming parts having strength distribution | |
| Yang et al. | Study on selective cooling of ultra high strength steel car body in hot forming | |
| CN103182452B (en) | Mould and method for shaped automotive metal parts |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20130417 |