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Al Alloying and Microstructure Properties of 4Cr5MoVSi Die Steel
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Xiaopei LIU1, Hui XU1, Pan LI2, Qiuli CHEN1, Zhengshun WEI1, Xiaoguang GUO3, Zhi'an LU3
Mining and Metallurgical Engineering | 2025, 45(5) : 181 - 185
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Mining and Metallurgical Engineering | 2025, 45(5): 181-185
• MATERIALS •
Al Alloying and Microstructure Properties of 4Cr5MoVSi Die Steel
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Xiaopei LIU1, Hui XU1, Pan LI2, Qiuli CHEN1, Zhengshun WEI1, Xiaoguang GUO3, Zhi'an LU3
Affiliations
  • 1.Henan Mechanical and Electrical Vocational College, Zhengzhou 451191, Henan, China
  • 2.Henan Vocational and Technical College, Zhengzhou 450046, Henan, China
  • 3.Zhengzhou University, Zhengzhou 450001, Henan, China
Published: 2025-10-01 doi: 10.3969/j.issn.0253-6099.2025.05.032
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Influence of Al content on the microstructure, phases, hardness, tensile and impact properties of quenched and tempered 4Cr5MoVSi die steel was studied by using optical microscopy, transmission electron microscopy (TEM), tensile testing machine among other instruments. It is found martensite is formed in the quenched and tempered 4Cr5MoVSi die steel with Al content of 0-0.6% (mass fraction, the same below), while martensite plus δ ferrite are formed in the quenched and tempered 4Cr5MoVSi die steel with Al content of 1.2%-1.8%. Without adding Al or with an addition of 0.3%-1.8% Al, 4Cr5MoVSi die steel after quench and tempering has α-Fe and M7C3 formed as its main phases. The 4Cr5MoVSi die steel with an Al content of 0.3%-1.2% has its relatively small variation in its hardness after quenching and tempering; however, with Al content up to 1.8%, the quenched and tempered die steel has its hardness significantly reduced. It is concluded that an appropriate addition of Al is beneficial to improvement in the room-temperature tensile strength, elongation at break, and impact toughness of quenched and tempered 4Cr5MoVSi die steel; with an addition of 1.2% Al, the quenched and tempered 4Cr5MoVSi die steel can have higher hardness, strength, and impact toughness.

4Cr5MoVSi  /  die steel  /  Al alloying  /  quenching and tempering  /  microstructure  /  mechanical property
Xiaopei LIU, Hui XU, Pan LI, Qiuli CHEN, Zhengshun WEI, Xiaoguang GUO, Zhi'an LU. Al Alloying and Microstructure Properties of 4Cr5MoVSi Die Steel[J]. Mining and Metallurgical Engineering, 2025 , 45 (5) : 181 -185 . DOI: 10.3969/j.issn.0253-6099.2025.05.032
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Year 2025 volume 45 Issue 5
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doi: 10.3969/j.issn.0253-6099.2025.05.032
  • Receive Date：2025-04-29
  • Online Date：2026-03-18
  • Published：2025-10-01
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  • Received：2025-04-29
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Affiliations
    1.Henan Mechanical and Electrical Vocational College, Zhengzhou 451191, Henan, China
    2.Henan Vocational and Technical College, Zhengzhou 450046, Henan, China
    3.Zhengzhou University, Zhengzhou 450001, Henan, China
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表12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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