WO2018006490A1 - 热冲压成形用钢材、热冲压成形工艺及热冲压成形构件 - Google Patents
热冲压成形用钢材、热冲压成形工艺及热冲压成形构件 Download PDFInfo
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- C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
- C21D8/02—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
- C21D8/04—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips to produce plates or strips for deep-drawing
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- C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R19/00—Wheel guards; Radiator guards, e.g. grilles; Obstruction removers; Fittings damping bouncing force in collisions
- B60R19/02—Bumpers, i.e. impact receiving or absorbing members for protecting vehicles or fending off blows from other vehicles or objects
- B60R19/03—Bumpers, i.e. impact receiving or absorbing members for protecting vehicles or fending off blows from other vehicles or objects characterised by material, e.g. composite
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- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
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- B62D21/00—Understructures, i.e. chassis frame on which a vehicle body may be mounted
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- B62D25/04—Door pillars ; windshield pillars
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- C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
- C21D8/02—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
- C21D8/04—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips to produce plates or strips for deep-drawing
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- C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
- C21D8/02—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
- C21D8/04—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips to produce plates or strips for deep-drawing
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- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
- C23C2/04—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor characterised by the coating material
- C23C2/06—Zinc or cadmium or alloys based thereon
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- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
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- C22C38/46—Ferrous alloys, e.g. steel alloys containing chromium with nickel with vanadium
Definitions
- the present invention relates to a steel material for hot stamping having ultrafine crystal grains, a hot stamping forming process, and a hot stamping forming member.
- thermoforming process comprising the steps of:
- Figure 1 shows the prior austenite grain boundary morphology of the steel of the present invention after hot stamping
- Figure 3 shows a hot stamping process diagram of a preferred embodiment of the present invention.
- a steel material for hot stamping comprising the following components by weight: 0.27 to 0.40% of C; 0.2 to 3.0% of Mn; 0.11 to 0.4% of V; 0 to 0.8. % Si; 0 to 0.5% Al; 0 to 2% Cr; 0 to 0.15% Ti; 0 to 0.15% Nb; 0 to 0.004% B; total content less than 2% Mo, Ni, Cu Alloying elements that are beneficial for improving their hardenability, as well as other impurity elements.
- Hot stamping forming According to the above steel sheet size, a reasonable press tonnage is established, and the stamping pressure is 1 to 40 MPa.
- the holding time is determined to be 4 to 40 s according to the thickness of the sheet to ensure that the temperature of the member is lower than when the mold is opened. 250 ° C, for example, 1.2 mm thick sheet holding time is 5 ⁇ 15s, 1.8mm thick sheet holding time is 7 ⁇ 20s through the mold quenching cooling system control mold surface temperature below 200 ° C, so that the steel in the mold It is rapidly cooled to 250 ° C or less at an average cooling rate of not less than 10 ° C / s.
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- Heat Treatment Of Sheet Steel (AREA)
- Shaping Metal By Deep-Drawing, Or The Like (AREA)
Abstract
Description
钢号 | 样品编号 | TS | SY | ET | A max(RD/TD) |
IS1 | ISP1 | 1870±20 | 1262±37 | 7.0±0.89 | 48/54 |
ISP2 | 1822±9 | 1204±1 | 7.4±0.14 | 56/60 | |
IS2 | ISP3 | 1891±4 | 1338±33 | 7.9±0.2 | 44/55 |
ISP4 | 1919±9 | 1315±9 | 7.1±0.29 | 52/61 | |
IS3 | ISP5 | 1924±1 | 1360 | 7.1±0.3 | 45/56 |
ISP6 | 1873±10 | 1341 | 7.2±0.16 | 54/63 | |
ISP7 | 1870±23 | 1431 | 7.5±0.24 | 45.5/58.9 | |
ISP8 | 1818±1 | 1425 | 7.3±0.09 | 53.7/73.9 | |
IS4 | ISP9 | 1689±11 | 1125±5 | 8.2±0.54 | 56/62 |
ISP10 | 1678±8 | 1178±15 | 8.3±0.21 | 58/67 | |
IS5 | ISP11 | 1944±32 | 1258±8 | 7.2±0.38 | 57.9/62.9 |
ISP12 | 1990±8 | 1364±12 | 7±0.31 | 51/63.5 | |
IS6 | ISP13 | 1989±2 | 1360±66 | 7.7±0.59 | 49.7/51.5 |
ISP14 | 2020±2 | 1336±1 | 8±0.1 | 52.1/62.3 | |
ISP7 | ISP15 | 2202±15 | 1508±32 | 6.9±0.42 | 47/55 |
ISP16 | 2185±26 | 1486±45 | 7.0±0.34 | 48.5/57 | |
CS1 | CSP1 | 1857±39 | 1359 | 5.9±0.11 | 41/50 |
CSP2 | 1798±23 | 1238 | 5.2±0.04 | 41.5/52.5 | |
CSP3 | 1796±1 | 1369 | 6.92±0.66 | 42/51 | |
CSP4 | 1702±20 | 1374 | 6.3±0.16 | 43/53 | |
22MnB5(Al-Si) | 无回火 | 1565±29 | 1132±27 | 7.5±0.49 | 51.1/59.6 |
Claims (15)
- 一种热冲压成形用钢材,其特征在于,所述热冲压成形用钢材以重量计包括以下成分:0.27~0.40%的C;0.2~3.0%的Mn;0.11~0.4%的V;0~0.8%的Si;0~0.5%的Al;0~2%的Cr;0~0.15%的Ti;0~0.15Nb;0~0.004%的B;总含量小于2%的Mo、Ni、Cu;以及不可避免的杂质元素。
- 如权利要求1所述的热冲压成形用钢材,其特征在于,所述热冲压成形用钢材在热冲压工艺过程中的加热温度区间为800~920℃,在奥氏体化过程中在奥氏体晶界存在VC和/或V与Ti、Nb的复合碳化物。
- 如权利要求2所述的热冲压成形用钢材,其特征在于,所述热冲压成形用钢材在奥氏体化过程中在奥氏体晶界的VC和/或V与Ti、Nb的复合碳化物的析出粒子尺寸为1~80nm。
- 如权利要求1~3中任一项所述的热冲压成形用钢材,其特征在于,所述热冲压成形用钢材在热冲压工艺过程中,在奥氏体化后的冷却过程中在包括晶界的奥氏体晶内析出一定量的VC和/或V与Ti、Nb的复合碳化物,该奥氏体晶内的碳化物粒子尺寸为0.1~20nm。
- 如权利要求1~3中任一项所述的热冲压成形用钢材,其特征在于,所述热冲压成形用钢材中的VC和/或V与Ti、Nb的复合碳化物的体积分数为大于0.1%。
- 如权利要求1~3中任一项所述的热冲压成形用钢材,其特征在于,所述热冲压成形用钢材在热冲压成形之后,在不进行回火的情况下即达到1300MPa~1700MPa的屈服强度,1800~2200MPa的抗拉强 度,以及6~9%的延伸率;回火热处理后性能达到1350~1800MPa的屈服强度,1700~2150MPa的抗拉强度,以及7~10%的延伸率。
- 如权利要求1~3中任一项所述的钢板,其特征在于,所述钢材包括热轧钢板、热轧酸洗钢板、冷轧钢板、或带有涂镀层的钢板。
- 如权利要求7所述的钢板,其特征在于,所述带有涂镀层的钢板为锌涂镀钢板,所述锌涂镀钢板是在其上形成金属锌层的热轧钢板或冷轧钢板,其中所述锌涂镀钢板包括选自热浸镀锌、镀锌退火、锌电镀或锌-铁电镀中的至少一种。
- 如权利要求7所述的钢板,其特征在于,所述带有涂镀层的钢板为在其上形成有铝硅层的热轧钢板或冷轧钢板,或者有机镀层的钢板。
- 一种热冲压成形工艺,其特征在于,包括以下工序:(a)钢材奥氏体化:提供如权利要求1~9中任一项所述的热冲压成形用钢材或其预成形构件,将其加热至800~920℃保温1~10000s;(b)钢材移送:将加热的上述钢材移送至热冲压成形模具上,保证移送至模具时钢材温度在550℃以上;(c)热冲压成形:根据上述钢材板料尺寸制定合理的压机吨位,冲压压强值为1~40MPa,根据板厚度确定保压时间,将其控制在4~40s,通过模具冷却系统控制模面温度在200℃以下,使钢材在模具中以不小于10℃/s的平均冷速迅速冷却至250℃以下。
- 如权利要求10所述的热冲压成形工艺,其特征在于,工序(a)中的加热方式包括辊道式加热炉、箱式加热炉、感应加热、电阻加热。
- 一种回火工艺,其特征在于,包括以下步骤:(a)通过权利要求10至11中任一项所述的热冲压成形工艺来获得成形构件;(b)在涂装工艺过程中,将所述成形构件加热至150~200℃,保温10~40min;或者将所述成形构件以0.001~100℃/s的加热速率加热至150~280℃,保温0.5~120min,然后以任意方式冷却。
- 一种热冲压成形构件,其特征在于,所述热冲压成形构件通过如权利要求1~6中任一项所述的钢材,经权利要求10或11所述的热冲压成形工艺制成,其性能达到1300MPa~1700MPa的屈服强度,1800~2200MPa的抗拉强度,以及6~9%的延伸率。
- 如权利要求13所述的热冲压成形构件,其特征在于,所述热冲压成形构件经过权利要求12所述的回火工艺处理,性能达到1350~1800MPa的屈服强度,1700~2150MPa的抗拉强度,以及7~10%的延伸率。
- 如权利要求13或14所述的热冲压成形构件,其特征在于,所述热冲压成形构件用于汽车高强度构件,包括汽车的A柱、B柱、保险杠、车顶构架、车底框架以及车门防撞杆。
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EP16907994.4A EP3483299A4 (en) | 2016-07-08 | 2016-09-08 | STEEL FOR HOT STAMPING, HOT STAMPING METHOD AND HOT STAMPED COMPONENT |
KR1020197003787A KR102544667B1 (ko) | 2016-07-08 | 2016-09-08 | 핫 스탬핑 성형을 위한 강재, 핫 스탬핑 성형 공정 및 핫 스탬핑 성형 부재 |
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KR20200080721A (ko) * | 2018-12-27 | 2020-07-07 | 현대제철 주식회사 | 핫 스탬핑 부품 제조장치 및 이를 이용한 핫 스탬핑 부품 제조방법 |
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EP3483299A4 (en) | 2020-03-11 |
KR102544667B1 (ko) | 2023-06-16 |
US20190309385A1 (en) | 2019-10-10 |
JP2019529717A (ja) | 2019-10-17 |
KR20190042563A (ko) | 2019-04-24 |
EP3483299A1 (en) | 2019-05-15 |
CN106399837A (zh) | 2017-02-15 |
JP7207660B2 (ja) | 2023-01-18 |
US11377703B2 (en) | 2022-07-05 |
JP2022023165A (ja) | 2022-02-07 |
CN106399837B (zh) | 2018-03-13 |
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