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To enhance the strength and hardness of steel used in logistics vehicles, CoCrW alloy samples were fabricated on the surface of steel substrates by laser wire deposition technology, and direct aging treatment was adopted to induce carbide precipitation. The effects of aging treatment on the phase composition, microhardness and tensile properties of the alloy were analyzed through microstructure observation and mechanical property tests. The results show that the as-deposited sample is composed of single γ-Co solid solution, and aging treatment promotes the partial transformation of γ-Co solid solution to ε-Co solid solution. In addition, Cr23 C6 carbides are precipitated inside the CoCrW alloy after aging treatment and are uniformly distributed in the matrix. The second phase strengthening effect derived from carbides significantly improves the microhardness of the as-deposited sample, with an average microhardness of (534±17.6) HV, which is increased by about 0.4 times after aging treatment. The tensile strength and the elongation of the as-deposited sample are about (787 ± 16) MPa and (16.6±0.45)%, respectively, while those of aged sample reach (1 318±10.7) MPa and (11.74±0.33)%, respectively. The tensile strength is elevated by approximately 0.67 times after aging. The enhancement in tensile strength is mainly attributed to the synergistic effect of second-phase precipitation strengthening caused by carbide precipitation, strengthening of the matrix induced by HCP phase transformation and grain refinement strengthening.

, authors=Lu LI, authorsList=Lu LI, 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=1314908061957972067, articleId=1314908061454655585, tenantId=1146029695717560320, journalId=1235980550691926019, language=CN, title=物流车用钢表面激光熔丝沉积CoCrW合金组织及力学性能研究, columnId=1236276110049202322, journalTitle=矿冶工程杂志, columnName=材料, runingTitle=null, highlight=null, articleAbstract=

为提升物流车用钢的强度和硬度,采用激光熔丝沉积技术在钢基体表面制备CoCrW合金层,并采用直接时效处理诱发碳化物析出。通过显微组织观察与力学性能测试,分析了时效处理对合金相组成、显微硬度及拉伸性能的影响。结果表明,沉积样品由单一的γ-Co固溶体组成,时效处理促使γ-Co固溶体部分转变为 ε-Co固溶体;经过时效处理后,CoCrW合金内部析出了第二相Cr23C6碳化物,并均匀分布在基体内部,第二相强化显著提升了CoCrW合金的显微硬度,其平均显微硬度为(534±17.6)HV,比沉积样品显微硬度提升约0.4倍;沉积样品抗拉强度为(787±16)MPa,伸长率为(16.6±0.45)%,时效样品抗拉强度为(1 318±10.7)MPa,伸长率为(11.74±0.33)%,时效样品抗拉强度较沉积样品抗拉强度提升约0.67倍。时效样品抗拉强度的提升主要归因于碳化物析出引起的第二相析出强化、HCP相转变对基体的强化和细晶强化的协同作用。

, authors=李禄, authorsList=李禄, authorCompany=null, correspAuthors=null, authorNote=

李禄(1988—),女,吉林省吉林市人,博士,副教授,主要研究方向为物流工程技术。E-mail:

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李禄(1988—),女,吉林省吉林市人,博士,副教授,主要研究方向为物流工程技术。E-mail:

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李禄(1988—),女,吉林省吉林市人,博士,副教授,主要研究方向为物流工程技术。E-mail:

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物流车用钢表面激光熔丝沉积CoCrW合金组织及力学性能研究
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矿冶工程杂志 | 材料 2026,46(3): 279-283
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矿冶工程杂志 |材料 2026 , 46 (3) : 279 -283
物流车用钢表面激光熔丝沉积CoCrW合金组织及力学性能研究
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李禄(1988—),女,吉林省吉林市人,博士,副教授,主要研究方向为物流工程技术。E-mail:

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李禄(1988—),女,吉林省吉林市人,博士,副教授,主要研究方向为物流工程技术。E-mail:

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李禄
作者信息
  • 长春汽车职业技术大学 汽车商贸管理学院,吉林 长春 130117
作者简介:

李禄(1988—),女,吉林省吉林市人,博士,副教授,主要研究方向为物流工程技术。E-mail:

Microstructure and Mechanical Properties of CoCrW Alloy Fabricated by Laser Wire Deposition on Steel for Logistics Vehicles
Lu LI
Affiliations
  • Automobile Business Management College, Changchun Technical University of Automobile, Changchun 130117, Jilin, China
doi: 10.3969/j.issn.0253-6099.2026.03.042
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为提升物流车用钢的强度和硬度,采用激光熔丝沉积技术在钢基体表面制备CoCrW合金层,并采用直接时效处理诱发碳化物析出。通过显微组织观察与力学性能测试,分析了时效处理对合金相组成、显微硬度及拉伸性能的影响。结果表明,沉积样品由单一的γ-Co固溶体组成,时效处理促使γ-Co固溶体部分转变为 ε-Co固溶体;经过时效处理后,CoCrW合金内部析出了第二相Cr23C6碳化物,并均匀分布在基体内部,第二相强化显著提升了CoCrW合金的显微硬度,其平均显微硬度为(534±17.6)HV,比沉积样品显微硬度提升约0.4倍;沉积样品抗拉强度为(787±16)MPa,伸长率为(16.6±0.45)%,时效样品抗拉强度为(1 318±10.7)MPa,伸长率为(11.74±0.33)%,时效样品抗拉强度较沉积样品抗拉强度提升约0.67倍。时效样品抗拉强度的提升主要归因于碳化物析出引起的第二相析出强化、HCP相转变对基体的强化和细晶强化的协同作用。

激光熔丝沉积  /  相组成  /  显微硬度  /  抗拉强度  /  钴基合金  /  表面涂层

To enhance the strength and hardness of steel used in logistics vehicles, CoCrW alloy samples were fabricated on the surface of steel substrates by laser wire deposition technology, and direct aging treatment was adopted to induce carbide precipitation. The effects of aging treatment on the phase composition, microhardness and tensile properties of the alloy were analyzed through microstructure observation and mechanical property tests. The results show that the as-deposited sample is composed of single γ-Co solid solution, and aging treatment promotes the partial transformation of γ-Co solid solution to ε-Co solid solution. In addition, Cr23 C6 carbides are precipitated inside the CoCrW alloy after aging treatment and are uniformly distributed in the matrix. The second phase strengthening effect derived from carbides significantly improves the microhardness of the as-deposited sample, with an average microhardness of (534±17.6) HV, which is increased by about 0.4 times after aging treatment. The tensile strength and the elongation of the as-deposited sample are about (787 ± 16) MPa and (16.6±0.45)%, respectively, while those of aged sample reach (1 318±10.7) MPa and (11.74±0.33)%, respectively. The tensile strength is elevated by approximately 0.67 times after aging. The enhancement in tensile strength is mainly attributed to the synergistic effect of second-phase precipitation strengthening caused by carbide precipitation, strengthening of the matrix induced by HCP phase transformation and grain refinement strengthening.

laser wire deposition  /  phase composition  /  microhardness  /  tensile strength  /  cobalt-based alloy  /  surface coating
李禄. 物流车用钢表面激光熔丝沉积CoCrW合金组织及力学性能研究. 矿冶工程杂志, 2026 , 46 (3) : 279 -283 . DOI: 10.3969/j.issn.0253-6099.2026.03.042
Lu LI. Microstructure and Mechanical Properties of CoCrW Alloy Fabricated by Laser Wire Deposition on Steel for Logistics Vehicles[J]. Mining and Metallurgical Engineering, 2026 , 46 (3) : 279 -283 . DOI: 10.3969/j.issn.0253-6099.2026.03.042
  • 中国物流与采购联合会研究项目(JZW2025206)
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doi: 10.3969/j.issn.0253-6099.2026.03.042
  • 接收时间:2025-12-02
  • 首发时间:2026-10-08
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  • 收稿日期:2025-12-02
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中国物流与采购联合会研究项目(JZW2025206)
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    长春汽车职业技术大学 汽车商贸管理学院,吉林 长春 130117
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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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