宋小放,周志明,王祥,范红山,张宝亮.强流脉冲电子束表面改性 1. 2344 钢的显微组织和性能[J].表面技术,2014,43(6):75-78,83.
SONG Xiao-fang,ZHOU Zhi-ming,WANG Xiang,FAN Hong-shan,ZHANG Bao-liang.Microstructure and Properties of 1. 2344 Steel Modified by High-current Pulsed Electron Beam[J].Surface Technology,2014,43(6):75-78,83
强流脉冲电子束表面改性 1. 2344 钢的显微组织和性能
Microstructure and Properties of 1. 2344 Steel Modified by High-current Pulsed Electron Beam
投稿时间:2014-07-18  修订日期:2014-12-10
DOI:
中文关键词:  1. 2344 钢  强流脉冲电子束  表面改性  硬度
英文关键词:1. 2344 steel  high current pulsed electron beam  surface modification  hardness
基金项目:国家自然科学基金(51101177,51171146,51171216);重庆市自然科学基金(cstc2012jjA245,cstc2014yykfB0187)
作者单位
宋小放 1. 重庆理工大学 材料科学与工程学院, 重庆 400054; 2. 重庆市模具工程技术研究中心, 重庆 400054; 
周志明 1. 重庆理工大学 材料科学与工程学院, 重庆 400054; 2. 重庆市模具工程技术研究中心, 重庆 400054; 
王祥 1. 重庆理工大学 材料科学与工程学院, 重庆 400054; 2. 重庆市模具工程技术研究中心, 重庆 400054; 
范红山 1. 重庆理工大学 材料科学与工程学院, 重庆 400054; 2. 重庆建设工业集团有限责任公司, 重庆 400054 
张宝亮 1. 重庆理工大学 材料科学与工程学院, 重庆 400054; 2. 重庆建设工业集团有限责任公司, 重庆 400054 
AuthorInstitution
SONG Xiao-fang 1. School of Material Science and Engineering, Chongqing University of Technology, Chongqing 400054, China;2. Chongqing Research Center for Mould Engineering Technology, Chongqing 400054, China; 
ZHOU Zhi-ming 1. School of Material Science and Engineering, Chongqing University of Technology, Chongqing 400054, China;2. Chongqing Research Center for Mould Engineering Technology, Chongqing 400054, China; 
WANG Xiang 1. School of Material Science and Engineering, Chongqing University of Technology, Chongqing 400054, China;2. Chongqing Research Center for Mould Engineering Technology, Chongqing 400054, China; 
FAN Hong-shan 1. School of Material Science and Engineering, Chongqing University of Technology, Chongqing 400054, China;2. Chongqing Jianshe Industrustry Co. Ltd, Chongqing 400054, China 
ZHANG Bao-liang 1. School of Material Science and Engineering, Chongqing University of Technology, Chongqing 400054, China;2. Chongqing Jianshe Industrustry Co. Ltd, Chongqing 400054, China 
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中文摘要:
      目的 在 1. 2344 钢表面获得一层硬度较高的强化层。 方法 利用强流脉冲电子束技术,在相同的加速电压下,采用不同的脉冲次数对 1. 2344 钢表面进行改性处理,研究处理前后样品的表层显微组织和性能变化规律。 结果 经强流脉冲电子束处理后,试样表面形成了形状各异、大小不一、分布不均的熔坑,并且随着脉冲次数的增加,熔坑数量逐渐减少,熔坑的直径变大。 当脉冲次数大于 50 次时,试样表面出现奥氏体相,表面显微硬度提高了 14. 5% 。 结论 强流脉冲电子束处理可使试样表层的晶粒变小,晶粒细化和表面宏观残余应力的共同作用促使试样显微硬度增加。
英文摘要:
      Objective To obtain a strengthened layer with high hardness on the surface of 1. 2344 steel. Methods 1. 2344 steel was irradiated with uniform accelerating voltage and different pulses using high-current pulsed eletron beam. The variation rules of surface microstructure and performance of the sample before and after modification were studied. Results It turned out that the surface of the samples formed some crater-like defects which had different shapes, sizes and nonuniform distruction after irradiation by HCPEB. The number of crater-like defects was decreased and the diameter was increased with the increasing irradiating pulse. Austenite appeared on the surface of the irradiated samples, and the surface microhardness was increased by nearly 14. 5% when the pulse frequency exceeded 50. Conclusion After processing with high-current pulsed electron beam, the size of the grain was reduced in the surface layer of the sample. The microhardness of the specimen was increased due to the grain refinement and the generation of macroscopic residual stress.
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