钒微合金化对汽车零部件用钢性能的影响

马骊歌; 李显生

doi:10.7513/j.issn.1004-7638.2021.04.012

钒微合金化对汽车零部件用钢性能的影响

doi: 10.7513/j.issn.1004-7638.2021.04.012

马骊歌^1,,
李显生²

1.
吉林交通职业技术学院，吉林长春 130012
2.
吉林大学材料科学与工程学院，吉林长春 130022

基金项目: 教育部科技发展中心科研课题（2018A05024）

详细信息

作者简介:
马骊歌（1967−），女，吉林长春人，硕士，副教授，研究方向：新能源汽车方面。E-mail：kongduan3975867616@163.com

中图分类号: TF841.3,TG142.1
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- 被引次数: 0
出版历程
- 收稿日期: 2021-01-25
- 刊出日期: 2021-08-10

Effect of vanadium microalloying on properties of steel for automobile parts

Ma Lige^1
,,
Li Xiansheng²

1.
Jilin Communications Polytechnic, Changchun 130012, Jilin, China
2.
School of Materials Science and Engineering, Jilin University, Changchun 130022, Jilin, China

摘要

摘要: 制备了不同钒含量的钒微合金化汽车零部件用钢42CrMoVx（x=0, 0.1, 0.3, 0.5, 0.7, 0.9），分析了钒微合金化对汽车零部件用钢拉伸性能、耐磨损和耐腐蚀性能的影响。结果表明，钒微合金化明显提高了汽车零部件用钢42CrMo的拉伸性能、耐磨损和耐腐蚀性能。随钒含量增加，钢拉伸性能、耐磨损和耐腐蚀性能均先提高后下降。与未添加钒的42CrMo钢相比，添加0.5%钒的汽车零部件用钢42CrMoV0.5的抗拉强度增大66 MPa、屈服强度增大67 MPa、断后伸长率增大3.5个百分点，磨损体积减小18×10⁻³ mm³，腐蚀电位正移88 mV、腐蚀电流减小了0.771 mA/cm²。汽车零部件用钢42CrMoV中钒含量优选0.5%。
- 汽车零部件用钢 /
- 42CrMoV /
- 微合金化 /
- 钒含量 /
- 拉伸性能 /
- 耐磨损性能 /
- 耐腐蚀性能
Abstract: Vanadium microalloyed steel 42CrMoVx (x=0, 0.1, 0.3, 0.5, 0.7, 0.9) for automobile parts was prepared. The effects of vanadium microalloying on tensile strength, wear resistance and corrosion resistance of the steel were analyzed. The results show that the tensile strength, wear resistance and corrosion resistance of 42CrMo steel for automobile parts are improved obviously by vanadium microalloying. With the increase of vanadium content, the tensile strength, wear resistance and corrosion resistance of the steel increase first and then decrease. Compared with 42CrMo without vanadium, the tensile strength, yield strength and elongation after fracture of 42CrMoV0.5 steel increase by 66 MPa, 67 MPa and 3.5% respectively, while the wear volume and corrosion current of 42CrMoV0.5 steel separately decrease by 18×10⁻³ mm³ and 0.771 mA/cm², with the corrosion potential positively shifted by 88 mV. The vanadium content in 42CrMoV steel used for auto parts is preferred to be 0.5%.
- automobile parts steel /
- 42CrMoV /
- microalloying /
- vanadium content /
- tensile property /
- wear resistance /
- corrosion resistance

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图 1 42CrMoVx试验钢拉伸试验结果

Figure 1. Tensile results of 42CrMoVx test steels

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图 2 42CrMoVx试验钢拉伸断口形貌

Figure 2. Tensile fracture morphologies of 42CrMoVx test steels

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图 3 42CrMoVx试验钢磨损试验结果

Figure 3. Wear results of 42CrMoVx test steels

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表 1 42CrMoVx试验钢化学成分

Table 1. Chemical compositions of 42CrMoVx test steels %

编号	C	Mn	Cr	Mo	Si	V	S	P	Fe
试样1（x=0）	0.42±0.05	0.75±0.05	1.1±0.05	0.25±0.05	0.20±0.05	0	<0.03	<0.03	Bal.
试样2（x=0.1）	0.42±0.05	0.75±0.05	1.1±0.05	0.25±0.05	0.20±0.05	0.1	<0.03	<0.03	Bal.
试样3（x=0.3）	0.42±0.05	0.75±0.05	1.1±0.05	0.25±0.05	0.20±0.05	0.3	<0.03	<0.03	Bal.
试样4（x=0.5）	0.42±0.05	0.75±0.05	1.1±0.05	0.25±0.05	0.20±0.05	0.5	<0.03	<0.03	Bal.
试样5（x=0.7）	0.42±0.05	0.75±0.05	1.1±0.05	0.25±0.05	0.20±0.05	0.7	<0.03	<0.03	Bal.
试样6（x=0.9）	0.42±0.05	0.75±0.05	1.1±0.05	0.25±0.05	0.20±0.05	0.9	<0.03	<0.03	Bal.

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表 2 42CrMoVx试验钢电化学腐蚀试验结果

Table 2. Electrochemical corrosion results of 42CrMoVx test steels

编号	腐蚀电位/V	腐蚀电流/（mA·cm⁻²）
试样1（x=0）	−0.499	1.305
试样2（x=0.1）	−0.445	0.846
试样3（x=0.3）	−0.421	0.751
试样4（x=0.5）	−0.401	0.534
试样5（x=0.7）	−0.418	0.722
试样6（x=0.9）	−0.459	0.917

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