Article(id=1187341684330349434, tenantId=1146029695717560320, journalId=1185652524569653253, issueId=1187341678487679284, articleNumber=1009-5438(2022)02-0053-04, orderNo=null, doi=null, pmid=null, cstr=null, oa=null, hot=null, price=null, onlineType=0, articleFormat=0, articleType=null, articleTypeStr=null, receivedDate=1644422400000, receivedDateStr=2022-02-10, revisedDate=null, revisedDateStr=null, acceptedDate=null, acceptedDateStr=null, onlineDate=1761013917286, onlineDateStr=2025-10-21, pubDate=1650816000000, pubDateStr=2022-04-25, doiRegisterDate=null, doiRegisterDateStr=null, onlineIssueDate=1761013917286, onlineIssueDateStr=2025-10-21, onlineJustAcceptDate=null, onlineJustAcceptDateStr=null, onlineFirstDate=null, onlineFirstDateStr=null, sourceXml=null, magXml=null, createTime=1761013917286, creator=13701087609, updateTime=1761013917286, updator=13701087609, issue=Issue{id=1187341678487679284, tenantId=1146029695717560320, journalId=1185652524569653253, year='2022', volume='48', issue='2', pageStart='1', pageEnd='98', issueExtLink='null', onlineDate='null', pubDate='null', beforeIssueId=null, nextIssueId=null, price=null, status=1, issueComplete=1, articleOrder=1, issueType=-1, specialIssue=null, createTime=1761013915892, creator=13701087609, updateTime=1761015806887, updator=13701087609, preIssue=null, nextIssue=null, ext={EN=IssueExt(id=1187349609945907689, tenantId=1146029695717560320, journalId=1185652524569653253, issueId=1187341678487679284, language=EN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=), CN=IssueExt(id=1187349609945907690, tenantId=1146029695717560320, journalId=1185652524569653253, issueId=1187341678487679284, language=CN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=)}, issueFiles=null}, startPage=53, endPage=56, ext={EN=ArticleExt(id=1187341684498121595, articleId=1187341684330349434, tenantId=1146029695717560320, journalId=1185652524569653253, language=EN, title=Development and Application of Galvanized Dual Phase Steel HC300/500DPD+Z, columnId=1187340471245357385, journalTitle=Science & Technology of Baotou Steel, columnName=Quality of Variety and Experiment and Research, runingTitle=null, highlight=null, articleAbstract=

The galvanized dual phase steel is the high strength steel widely applied in the field of automobile sheet. In order to meet the requirements of lightweight raw material for automobile manufacturer, the galvanized dual phase steel HC300/500DPD+Z is successfully developed through adopting the microalloying composition system of C-Si-Mn-Cr as well as such reasonable process design as hot rolling, pickling, annealing, hot galvanizing and finishing based on the characteristics of 2 030 mm hot galvanizing production line. The production process and using effects of users showed that its mechanical properties were qualified, production process was mature and it was with good formability to meet users’ requirements when applied for automotive structural parts.

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镀锌双相钢是汽车板领域应用广泛的高强钢,为满足汽车生产厂对于轻量化原材料的需求,基于2 030 mm热镀锌生产线特点,采用C-Si-Mn-Cr微合金化成分体系,并通过合理的热轧、酸轧、退火、热镀锌及光整工艺设计,成功开发了镀锌双相钢HC300/500DPD+Z。产品生产过程和用户使用效果表明,镀锌双相钢HC300/500DPD+Z产品力学性能合格,生产工艺成熟,具有良好的成形性能,应用于汽车结构件,满足用户使用需求。

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宋冉臣(1988-),男,内蒙古包头市人,硕士,工程师,现从事冷轧、镀锌钢带研发工作。

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宋冉臣(1988-),男,内蒙古包头市人,硕士,工程师,现从事冷轧、镀锌钢带研发工作。

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宋冉臣(1988-),男,内蒙古包头市人,硕士,工程师,现从事冷轧、镀锌钢带研发工作。

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C Si Mn P S Alt
≤0.15 ≤0.60 ≤2.50 ≤0.040 ≤0.015 ≤2.00
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HC300/500DPD+Z化学成分技术要求(质量分数)%

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C Si Mn P S Alt
≤0.15 ≤0.60 ≤2.50 ≤0.040 ≤0.015 ≤2.00
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屈服强度
/MPa
抗拉强度
/MPa
断后伸长率
/%
应变硬化
指数n90
300~370 ≥500 ≥24 ≥0.15
), ArticleFig(id=1187341866098901413, tenantId=1146029695717560320, journalId=1185652524569653253, articleId=1187341684330349434, language=CN, label=表2, caption=

HC300/500DPD+Z力学性能要求

, figureFileSmall=null, figureFileBig=null, tableContent=
屈服强度
/MPa
抗拉强度
/MPa
断后伸长率
/%
应变硬化
指数n90
300~370 ≥500 ≥24 ≥0.15
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C Si Mn P S Alt Cr
0.06~0.09 0.10~0.40 1.50~1.70 ≤0.035 ≤0.010 0.015~0.050 ≤0.45
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HC300/500DPD+Z化学成分(质量分数)%

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C Si Mn P S Alt Cr
0.06~0.09 0.10~0.40 1.50~1.70 ≤0.035 ≤0.010 0.015~0.050 ≤0.45
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屈服强度
/MPa
抗拉强度
/MPa
延伸率
/%
屈强比
837~867 888~948 1.0~2.0 0.89~0.94
), ArticleFig(id=1187341866375725481, tenantId=1146029695717560320, journalId=1185652524569653253, articleId=1187341684330349434, language=CN, label=表4, caption=

冷硬态HC300/500DPD+Z力学性能

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屈服强度
/MPa
抗拉强度
/MPa
延伸率
/%
屈强比
837~867 888~948 1.0~2.0 0.89~0.94
), ArticleFig(id=1187341866438640042, tenantId=1146029695717560320, journalId=1185652524569653253, articleId=1187341684330349434, language=EN, label=null, caption=null, figureFileSmall=null, figureFileBig=null, tableContent=
要求及牌号 光整延伸率/% 屈服强度/MPa 抗拉强度/MPa 延伸率/% n 屈强比
技术指标 300~370 ≥500 ≥24 ≥0.15
HC300/500DPD+Z 0.4 332 505 27.0 0.16 0.66
0.6 345 507 26.5 0.16 0.68
0.8 361 508 25.0 0.16 0.71
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不同光整延伸率HC300/500DPD+Z力学性能

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要求及牌号 光整延伸率/% 屈服强度/MPa 抗拉强度/MPa 延伸率/% n 屈强比
技术指标 300~370 ≥500 ≥24 ≥0.15
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0.6 345 507 26.5 0.16 0.68
0.8 361 508 25.0 0.16 0.71
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要求及牌号 厚度/mm 屈服强度/MPa 抗拉强度/MPa 延伸率/% n
技术要求 300~370 ≥500 ≥24 ≥0.15
HC300/500DPD+Z 1.4 327~358 505~551 25.0~33.0 0.15~0.16
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镀锌双相钢HC300/500DPD+Z力学性能

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要求及牌号 厚度/mm 屈服强度/MPa 抗拉强度/MPa 延伸率/% n
技术要求 300~370 ≥500 ≥24 ≥0.15
HC300/500DPD+Z 1.4 327~358 505~551 25.0~33.0 0.15~0.16
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镀锌双相钢HC300/500DPD+Z研制与应用
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宋冉臣 , 路璐 , 张秀飞 , 刘毅
包钢科技 | 品种质量与试验研究 2022,48(2): 53-56
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包钢科技 | 品种质量与试验研究 2022, 48(2): 53-56
镀锌双相钢HC300/500DPD+Z研制与应用
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宋冉臣, 路璐, 张秀飞, 刘毅
作者信息
  • 内蒙古包钢稀土钢板材有限责任公司, 内蒙古 包头 014010
  • 宋冉臣(1988-),男,内蒙古包头市人,硕士,工程师,现从事冷轧、镀锌钢带研发工作。

Development and Application of Galvanized Dual Phase Steel HC300/500DPD+Z
Ran-chen Song, Lu Lu, Xiu-fei Zhang, Yi Liu
Affiliations
  • Inner Mongolia Baotou Steel Rare Earth Steel Plate Co., Ltd., Baotou 014010, Inner Mongolia Autonomous Region, China
出版时间: 2022-04-25
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镀锌双相钢是汽车板领域应用广泛的高强钢,为满足汽车生产厂对于轻量化原材料的需求,基于2 030 mm热镀锌生产线特点,采用C-Si-Mn-Cr微合金化成分体系,并通过合理的热轧、酸轧、退火、热镀锌及光整工艺设计,成功开发了镀锌双相钢HC300/500DPD+Z。产品生产过程和用户使用效果表明,镀锌双相钢HC300/500DPD+Z产品力学性能合格,生产工艺成熟,具有良好的成形性能,应用于汽车结构件,满足用户使用需求。

汽车结构件  /  镀锌双相钢  /  光整延伸率

The galvanized dual phase steel is the high strength steel widely applied in the field of automobile sheet. In order to meet the requirements of lightweight raw material for automobile manufacturer, the galvanized dual phase steel HC300/500DPD+Z is successfully developed through adopting the microalloying composition system of C-Si-Mn-Cr as well as such reasonable process design as hot rolling, pickling, annealing, hot galvanizing and finishing based on the characteristics of 2 030 mm hot galvanizing production line. The production process and using effects of users showed that its mechanical properties were qualified, production process was mature and it was with good formability to meet users’ requirements when applied for automotive structural parts.

automotive structural parts  /  galvanized dual phase steel  /  elongation of finishing
宋冉臣, 路璐, 张秀飞, 刘毅. 镀锌双相钢HC300/500DPD+Z研制与应用. 包钢科技, 2022 , 48 (2) : 53 -56 .
Ran-chen Song, Lu Lu, Xiu-fei Zhang, Yi Liu. Development and Application of Galvanized Dual Phase Steel HC300/500DPD+Z[J]. Science & Technology of Baotou Steel, 2022 , 48 (2) : 53 -56 .
500 MPa级镀锌双相钢主要由铁素体和以岛状弥散分布在基体上的马氏体两相组成[1],由于其良好的强韧性匹配、可焊性和耐腐蚀性能,应用于需要一定强度要求的汽车结构件中,起到桥梁和支撑作用。为满足汽车生产厂对于轻量化原材料的需求,包钢开展镀锌双相钢HC300/500DPD+Z的研制和用户应用工作。经过生产试验,开发的产品化学成分和生产工艺设计合理,力学性能合格且稳定,表面质量良好,具备批量供货能力,用户应用效果良好。
参考镀锌双相钢HC300/500DPD+Z的相关标准,结合用户实际需求,包钢开发的镀锌双相钢HC300/500DPD+Z的化学成分、力学性能要求如表1表2所示。
500 MPa级镀锌双相钢产品生产工序主要为冶炼、热轧、酸轧、退火+热镀锌、光整、拉矫,具体工艺流程如下:
铁水预处理→转炉→LF精炼→加热炉→粗轧→精轧→层流冷却→卷取→酸洗连轧→退火炉→热镀锌→光整→拉矫→涂油→卷取
为保证镀锌双相钢HC300/500DPD+Z力学性能满足要求,需要设计合理的化学成分范围,不同的合金元素对镀锌双相钢的影响机理不同[2-3]。C元素是通过相变强化得到马氏体组织的最重要元素,其实际含量不同,显著影响临界区热处理镀锌双相钢中马氏体的碳含量和马氏体的体积分数,进而影响产品强度。Si元素可溶于铁素体和奥氏体,提高钢的硬度和强度,具有“净化”铁素体和稳定镀锌双相钢性能的作用,过高的Si含量影响镀锌双相钢表面质量,所以Si含量的设计不宜过高。Mn元素是奥氏体化稳定元素,显著提高奥氏体的淬透性。Cr元素可细化铁素体晶粒,推迟珠光体和贝氏体转变,提高钢的淬透性。镀锌双相钢HC300/500DPD+Z化学成分设计如表3所示。
为保证酸轧工序在设计的压下率范围内,轧制力分配合理,500 MPa级镀锌双相钢的热轧态典型金相组织一般为铁素体+珠光体。热轧工艺设计相对较高的加热温度,可提高钢带表面质量;为降低带状组织缺陷,卷取温度设计较低的工艺参数。加热温度控制在1 200~1 260 ℃,终轧温度控制在850~900 ℃,卷取温度控制在550~600 ℃,有利于获得所需的铁素体+珠光体金相组织。
酸轧工艺中,压下率参数对镀锌双相钢HC300/500DPD+Z的力学性能影响最为明显,压下率越大,加工硬化效果越明显,镀锌双相钢酸洗连轧变形储存能高,增加后续退火工艺再结晶的驱动力,再结晶形核位置增多,易于获得细小的退火组织。考虑到设备保护、不同厚度规格产品等因素,酸轧压下率实际控制不小于50%,同时保证生产顺行及产品力学性能满足要求。
在板宽1/4处切取金相试样,抛光后用4%的硝酸酒精溶液腐蚀,在光学显微镜下观察,冷硬态镀锌双相钢HC300/500DPD+Z金相组织如图1所示,金相组织为铁素体+珠光体,铁素体被压扁呈条状,珠光体被压扁或压碎。
冷硬态镀锌双相钢HC300/500DPD+Z力学性能见表4
连续退火、热镀锌工艺主要包括加热段温度、均热段温度、缓冷段温度、快冷段温度、过时效段温度、入锌锅温度、冷却塔顶温度等,工艺曲线如图2所示。
退火前,镀锌双相钢冷硬态金相组织为纤维状的铁素体和珠光体,通过加热到两相区温度800 ℃并保温,使钢带部分奥氏体化,随后缓慢冷却至680 ℃,部分奥氏体转变为铁素体,同时C、Mn等元素向奥氏体中聚集,稳定未转变的奥氏体,提高淬透性,随后快冷至460 ℃,过时效段保温一段时间,有利于碳化物析出,净化铁素体,热镀锌后再冷却至250 ℃以下,稳定马氏体组织,提高镀锌双相钢的塑韧性。
光整延伸率对产品性能有一定影响,为合理确定最佳工艺参数,设计不同光整延伸率(0.4%、0.6%、0.8%),研究不同光整延伸率对产品力学性能的影响。将成品钢带切取成标准拉伸试样,标距为L0=80mm, 平行部宽度b0=20mm,进行力学性能检测。
镀锌双相钢HC300/500DPD+Z不同光整延伸率的力学性能如表5所示,光整延伸率为0.4%~0.8%,力学性能指标中,屈服强度为332~361 MPa,抗拉强度为505~508 MPa,延伸率为25.0%~27.0%,n值为0.16,屈强比为0.66~0.71,满足技术指标要求。
光整延伸率对产品力学性能指标中的屈服强度、屈强比有明显影响,如图3所示。光整延伸率由0.4%提高到0.8%,产品屈服强度由332 MPa提高至361 MPa,抗拉强度由505 MPa提高至508 MPa,延伸率由27.0%下降至25.0%,n值无明显变化规律,屈强比由0.66提高到0.71。
光整延伸率对镀锌双相钢HC300/500DPD+Z产品有一定加工硬化作用,随着光整延伸率由0.4%提升到0.8%,屈服强度明显上升,抗拉强度略有提高,导致屈强比由0.66提高到0.71。为提高产品成型性能及适用性,应保证产品低屈强比,良好强韧性匹配等特点,光整延伸率应设定在0.4%。
镀锌双相钢HC300/500DPD+Z金相组织为铁素体+马氏体+少量贝氏体,晶粒度约10.5级,如图4所示。
批量供货的产品力学性能如表6所示。
表6可知,镀锌双相钢HC300/500DPD+Z力学性能合格,满足技术要求。
批量生产的产品成功供货于某车企,应用于汽车副车架中支架内板,成形性能良好,满足用户使用需求。图5为镀锌双相钢HC300/500DPD+Z实际应用情况。
(1)通过采用C-Si-Mn-Cr微合金化成分体系及合理的热轧、酸轧、退火、热镀锌及光整工艺设计,成功开发了镀锌双相钢HC300/500DPD+Z,研制的产品力学性能中屈服强度为327~358 MPa,抗拉强度为505~551 MPa,延伸率为25.0%~33.0%,n值为0.15~0.16,满足技术要求。
(2)光整延伸率影响力学性能指标中的屈服强度以及屈强比。为提高产品成形性能及适用性,应保证产品低屈强比,良好强韧性匹配等特点,光整延伸率应设定在0.4%。
(3)镀锌双相钢HC300/500DPD+Z金相组织由铁素体、马氏体和少量贝氏体组成,晶粒度约10.5级。
(4)研制的镀锌双相钢HC300/500DPD+Z具有良好的成形性能,应用于汽车副车架中支架内板等汽车内部结构零件,满足用户使用需求。
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张四方, 吉飞, 李山桐. 超高强双相钢DP980冷连轧机组轧制压力模型优化[J]. 金属世界, 2018,(5):35-39.
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2022年第48卷第2期
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  • 接收时间:2022-02-10
  • 首发时间:2025-10-21
  • 出版时间:2022-04-25
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  • 收稿日期:2022-02-10
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2种不同金属材料的力学参数

Family
属数
Number of
genus
种数
Number of
species
占总种数比例
Percentage of
total species (%)

Genus
种数
Number of
species
占总种数比例
Percentage of total
species (%)
鹅膏菌科Amanitaceae 2 11 5.26 鹅膏菌属 Amanita 10 4.78
小菇科 Mycenaceae 2 12 5.74 丝盖伞属 Inocybe 5 2.39
多孔菌科 Polyporaceae 8 14 6.70 蜡蘑属 Laccaria 5 2.39
红菇科 Russulaceae 3 23 11.00 小皮伞属 Marasmius 6 2.87
小菇属 Mycena 11 5.26
光柄菇属 Pluteus 5 2.39
红菇属 Russula 17 8.13
栓菌属 Trametes 5 2.39
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