Article(id=1309475253718446873, tenantId=1146029695717560320, journalId=1189873562199433220, issueId=1309475253038964788, articleNumber=null, orderNo=null, doi=10.19710/J.cnki.1003-8817.20250257, pmid=null, cstr=null, oa=null, hot=null, price=null, onlineType=0, articleFormat=0, articleType=null, articleTypeStr=null, receivedDate=null, receivedDateStr=null, revisedDate=null, revisedDateStr=null, acceptedDate=null, acceptedDateStr=null, onlineDate=1790132829360, onlineDateStr=2026-09-23, pubDate=1771516800000, pubDateStr=2026-02-20, doiRegisterDate=null, doiRegisterDateStr=null, onlineIssueDate=1790132829360, onlineIssueDateStr=2026-09-23, onlineJustAcceptDate=null, onlineJustAcceptDateStr=null, onlineFirstDate=null, onlineFirstDateStr=null, sourceXml=null, magXml=null, createTime=1790132829360, creator=13701087609, updateTime=1790132829360, updator=13701087609, issue=Issue{id=1309475253038964788, tenantId=1146029695717560320, journalId=1189873562199433220, year='2026', volume='', issue='2', pageStart='1', pageEnd='72', issueExtLink='null', onlineDate='null', pubDate='1771516800000', pubDateStr='2026-02-20', beforeIssueId=null, nextIssueId=null, price=null, status=1, issueComplete=1, articleOrder=1, issueType=-1, specialIssue=0, createTime=1790132829198, creator='13701087609', updateTime=1790133031676, updator='13701087609', preIssue=null, nextIssue=null, articleTotal=null, ext={EN=IssueExt(id=1309476102360367135, tenantId=1146029695717560320, journalId=1189873562199433220, issueId=1309475253038964788, language=EN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=), CN=IssueExt(id=1309476102360367136, tenantId=1146029695717560320, journalId=1189873562199433220, issueId=1309475253038964788, language=CN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=)}, issueFiles=null, downloadFileDto=null}, startPage=1, endPage=9, ext={EN=ArticleExt(id=1309475253902996250, articleId=1309475253718446873, tenantId=1146029695717560320, journalId=1189873562199433220, language=EN, title=Research on Application of Multi-Element Alloyed SiMo Ductile Iron in Exhaust Manifolds of Automotive Engine, columnId=null, journalTitle=Automobile Technology & Material, columnName=null, runingTitle=null, highlight=null, articleAbstract=

Alloying is one of the key approaches to improve the mechanical properties and thermal resistance of SiMo ductile iron. This paper reviews the effects of alloying elements on the microstructure and properties of SiMo ductile iron. A systematic study on multi-element alloyed SiMo ductile iron was carried out targeting exhaust manifolds of high peak-pressure diesel engines and gas engines. The results show that when the mass fraction of Mo increases from 0.9% to 1.46%, the volume fraction of carbides in the microstructure rises, leading to increases in the tensile strength, yield strength and hardness of SiMo ductile iron, while the elongation decreases by 50%. Vanadium alloying elevates the tensile strength but reduces the elongation of SiMo ductile iron; the material achieves satisfactory room-temperature mechanical properties at a V mass fraction of 0.4%. The short-term tensile strength at 800 ℃ increases with the rise of V content, yet no significant change is observed when the V mass fraction exceeds 0.4%. Among the multi-element alloyed SiMo ductile irons, the V-Nb alloyed SiMo ductile iron reaches a high-temperature tensile strength of 59 MPa, while the V-Cr and V-Nb-Cr alloyed variants exhibit high-temperature strengths of 61~64 MPa. These values meet the high-temperature tensile strength requirements for SiMo ductile iron applied in exhaust manifolds of high peak-pressure diesel engines and gas engines.

, authors=Tong Jin1, 2, Lujun Jiang2, Xu Chen1, Liulin Lu2, Sheng Liu2, Qizhou Cai1, authorsList=Tong Jin, Lujun Jiang, Xu Chen, Liulin Lu, Sheng Liu, Qizhou Cai, authorCompany=null, correspAuthors=null, authorNote=null, correspAuthorsNote=null, copyrightStatement=null, copyrightOwner=null, extLink=null, articleAbsUrl=null, sourceXml=null, magXml=null, pdfUrl=null, pdf=null, pdfFileSize=null, pdfExtLink=null, richHtmlUrl=null, mobilePdfUrl=null, reviewReport=null, pdfFirstPage=null, abstractGraph=null, abstractGraphContent=null, abstractVideo=null, citation=null, cebUrl=null, magXmlContent=null, mapNumber=null, fund=null), CN=ArticleExt(id=1309475254167237403, articleId=1309475253718446873, tenantId=1146029695717560320, journalId=1189873562199433220, language=CN, title=多元合金化SiMo球墨铸铁在汽车发动机排气歧管中的应用研究, columnId=1309475253923962934, journalTitle=汽车工艺与材料, columnName=中国汽车工程学会汽车材料分会第24届学术年会优秀论文——材料工艺研究, runingTitle=null, highlight=null, articleAbstract=

合金化是改善SiMo球墨铸铁力学性能和耐热性能的重要措施之一,综述了合金元素对SiMo球墨铸铁组织和性能的影响,以高爆压柴油发动机和气体发动机排气歧管为对象,开展了多元合金化SiMo球墨铸铁的研究工作。结果表明:Mo质量分数由0.9%提高至1.46%时,组织中碳化物数量增加,SiMo球墨铸铁的抗拉强度、屈服强度和硬度提高,但延伸率下降了50%;V合金化使SiMo球墨铸铁的抗拉强度升高、延伸率下降,V质量分数为0.4%时SiMo球墨铸铁获得良好的常温力学性能;800 ℃短时抗拉强度随V量的增加而增大,V质量分数超过0.4%后无明显变化;多元合金化SiMo球墨铸铁中,V-Nb合金化SiMo球墨铸铁的高温抗拉强度为59 MPa,而V-Cr和V-Nb-Cr合金化SiMo球墨铸铁的高温强度为61~64 MPa,满足高爆压柴油发动机和气体发动机排气歧管对SiMo球墨铸铁高温抗拉强度的要求。

, authors=金通1, 2, 蒋路军2, 陈旭1, 卢柳林2, 刘胜2, 蔡启舟1, authorsList=金通, 蒋路军, 陈旭, 卢柳林, 刘胜, 蔡启舟, authorCompany=null, correspAuthors=null, authorNote=

金通(1990—),男,博士学位,高级工程师,研究方向为汽车黑色铸造材料开发与应用。

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金通(1990—),男,博士学位,高级工程师,研究方向为汽车黑色铸造材料开发与应用。

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金通(1990—),男,博士学位,高级工程师,研究方向为汽车黑色铸造材料开发与应用。

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多元合金化SiMo球墨铸铁在汽车发动机排气歧管中的应用研究
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金通 1, 2 , 蒋路军 2 , 陈旭 1 , 卢柳林 2 , 刘胜 2 , 蔡启舟 1
汽车工艺与材料 | 中国汽车工程学会汽车材料分会第24届学术年会优秀论文——材料工艺研究 2026,(2): 1-9
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汽车工艺与材料 |中国汽车工程学会汽车材料分会第24届学术年会优秀论文——材料工艺研究 2026 , (2) : 1 -9
多元合金化SiMo球墨铸铁在汽车发动机排气歧管中的应用研究
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金通(1990—),男,博士学位,高级工程师,研究方向为汽车黑色铸造材料开发与应用。

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金通(1990—),男,博士学位,高级工程师,研究方向为汽车黑色铸造材料开发与应用。

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金通1, 2, 蒋路军2, 陈旭1, 卢柳林2, 刘胜2, 蔡启舟1
作者信息
  • 1.华中科技大学材料成形与模具技术国家重点实验室,武汉 430074
  • 2.东风商用车技术中心,武汉 442000
作者简介:

金通(1990—),男,博士学位,高级工程师,研究方向为汽车黑色铸造材料开发与应用。

Research on Application of Multi-Element Alloyed SiMo Ductile Iron in Exhaust Manifolds of Automotive Engine
Tong Jin1, 2, Lujun Jiang2, Xu Chen1, Liulin Lu2, Sheng Liu2, Qizhou Cai1
Affiliations
  • 1.Dongfeng Commercial Vehicle Technology Center, Wuhan 442000
  • 2.State Key Laboratory of Materials Processing and Die& Mould Technology, Huazhong University of Science and Technology, Wuhan 430074
出版时间: 2026-02-20 doi: 10.19710/J.cnki.1003-8817.20250257
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合金化是改善SiMo球墨铸铁力学性能和耐热性能的重要措施之一,综述了合金元素对SiMo球墨铸铁组织和性能的影响,以高爆压柴油发动机和气体发动机排气歧管为对象,开展了多元合金化SiMo球墨铸铁的研究工作。结果表明:Mo质量分数由0.9%提高至1.46%时,组织中碳化物数量增加,SiMo球墨铸铁的抗拉强度、屈服强度和硬度提高,但延伸率下降了50%;V合金化使SiMo球墨铸铁的抗拉强度升高、延伸率下降,V质量分数为0.4%时SiMo球墨铸铁获得良好的常温力学性能;800 ℃短时抗拉强度随V量的增加而增大,V质量分数超过0.4%后无明显变化;多元合金化SiMo球墨铸铁中,V-Nb合金化SiMo球墨铸铁的高温抗拉强度为59 MPa,而V-Cr和V-Nb-Cr合金化SiMo球墨铸铁的高温强度为61~64 MPa,满足高爆压柴油发动机和气体发动机排气歧管对SiMo球墨铸铁高温抗拉强度的要求。

SiMo球墨铸铁  /  排气歧管  /  多元合金化  /  常温强度  /  高温强度

Alloying is one of the key approaches to improve the mechanical properties and thermal resistance of SiMo ductile iron. This paper reviews the effects of alloying elements on the microstructure and properties of SiMo ductile iron. A systematic study on multi-element alloyed SiMo ductile iron was carried out targeting exhaust manifolds of high peak-pressure diesel engines and gas engines. The results show that when the mass fraction of Mo increases from 0.9% to 1.46%, the volume fraction of carbides in the microstructure rises, leading to increases in the tensile strength, yield strength and hardness of SiMo ductile iron, while the elongation decreases by 50%. Vanadium alloying elevates the tensile strength but reduces the elongation of SiMo ductile iron; the material achieves satisfactory room-temperature mechanical properties at a V mass fraction of 0.4%. The short-term tensile strength at 800 ℃ increases with the rise of V content, yet no significant change is observed when the V mass fraction exceeds 0.4%. Among the multi-element alloyed SiMo ductile irons, the V-Nb alloyed SiMo ductile iron reaches a high-temperature tensile strength of 59 MPa, while the V-Cr and V-Nb-Cr alloyed variants exhibit high-temperature strengths of 61~64 MPa. These values meet the high-temperature tensile strength requirements for SiMo ductile iron applied in exhaust manifolds of high peak-pressure diesel engines and gas engines.

SiMo ductile iron  /  Exhaust manifold  /  Multi-element alloying  /  Room-temperature strength  /  High temperature strength
金通, 蒋路军, 陈旭, 卢柳林, 刘胜, 蔡启舟. 多元合金化SiMo球墨铸铁在汽车发动机排气歧管中的应用研究. 汽车工艺与材料, 2026 , (2) : 1 -9 . DOI: 10.19710/J.cnki.1003-8817.20250257
Tong Jin, Lujun Jiang, Xu Chen, Liulin Lu, Sheng Liu, Qizhou Cai. Research on Application of Multi-Element Alloyed SiMo Ductile Iron in Exhaust Manifolds of Automotive Engine[J]. Automobile Technology & Material, 2026 , (2) : 1 -9 . DOI: 10.19710/J.cnki.1003-8817.20250257

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doi: 10.19710/J.cnki.1003-8817.20250257
  • 首发时间:2026-09-23
  • 出版时间:2026-02-20
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    1.华中科技大学材料成形与模具技术国家重点实验室,武汉 430074
    2.东风商用车技术中心,武汉 442000
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2种不同金属材料的力学参数
科
Family
属数
Number of
genus
种数
Number of
species
占总种数比例
Percentage of
total species (%)
属
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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