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Effects of Preheating on Microstructures and Mechanical Properties of Heat Affected Zone of 27SiMn Steel After Laser Cladding Process
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Changhui GUO1, Congwei LI1, 2, Hui YANG3, Shuangming DU1, Eryong LIU1
Mining and Metallurgical Engineering | 2023, 43(1) : 145 - 149
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Mining and Metallurgical Engineering | 2023, 43(1): 145-149
• MATERIALS •
Effects of Preheating on Microstructures and Mechanical Properties of Heat Affected Zone of 27SiMn Steel After Laser Cladding Process
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Changhui GUO1, Congwei LI1, 2, Hui YANG3, Shuangming DU1, Eryong LIU1
Affiliations
  • 1.College of Materials Science and Engineering, Xi'an University of Science and Technology, Xi'an 710054, Shaanxi, China
  • 2.Xi'an Aero-engine Controls Technology Co Ltd, Xi'an 710082, Shaanxi, China
  • 3.Shenmu Ningtiaota Mining Co Ltd, Shaanxi Coal Group, Yulin 719314, Shaanxi, China
Published: 2023-02-01 doi: 10.3969/j.issn.0253-6099.2023.01.032
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A Fe-based cladding layer was prepared on the surface of 27SiMn steel by using laser cladding technique, and effect of preheating on the microstructure and mechanical properties of the heat affected zone (HAZ) of 27SiMn steel was investigated. The results show that a large amount of martensite appears in the HAZ of 27SiMn steel after laser cladding process. The tensile fracture is composed of river-pattern cleavage plane, tear edge and dimple, representing a quasi-cleavage fracture; preheating treatment effectively reduces the amount of martensite and brings pearlite structure. When the preheating temperature is 100 ℃, the quenched layer has its hardness decreased by 25.4%, elongation increased by 11.5%, and tensile strength decreased by 14.3%. When the preheating temperature rises to 300 ℃, ductile fracture occurs in the material under tensile force. Appropriate preheating can effectively reduce the martensite in the HAZ of 27SiMn steel and alleviate the decline in the toughness of 27SiMn steel caused by quenching, thus improving the safety during the service of hydraulic cylinder made of laser cladded 27SiMn steel.

preheating  /  27SiMn steel  /  laser cladding  /  Fe-based cladding layer  /  heat affected zone (HAZ)  /  microstructure  /  mechanical properties
Changhui GUO, Congwei LI, Hui YANG, Shuangming DU, Eryong LIU. Effects of Preheating on Microstructures and Mechanical Properties of Heat Affected Zone of 27SiMn Steel After Laser Cladding Process[J]. Mining and Metallurgical Engineering, 2023 , 43 (1) : 145 -149 . DOI: 10.3969/j.issn.0253-6099.2023.01.032
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doi: 10.3969/j.issn.0253-6099.2023.01.032
  • Receive Date：2022-09-09
  • Online Date：2026-03-05
  • Published：2023-02-01
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  • Received：2022-09-09
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Affiliations
    1.College of Materials Science and Engineering, Xi'an University of Science and Technology, Xi'an 710054, Shaanxi, China
    2.Xi'an Aero-engine Controls Technology Co Ltd, Xi'an 710082, Shaanxi, China
    3.Shenmu Ningtiaota Mining Co Ltd, Shaanxi Coal Group, Yulin 719314, Shaanxi, 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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