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interfacial oxides Evolution of High-Speed Steel Joints by Hot-Compression Bonding

Acta Metallurgica Sinica(English Letters) 2022年第11期35卷 1837-1848页

作者： Wei-Feng Liu Bi-Jun Xie Ming-Yue Sun Bin Xu Yan-Fei Cao Dian-Zhong Li Shenyang National Laboratory for Materials Science Instituteof Metal ResearchChineseAcademyof SciencesShenyang 110016China School of Materials Scienceand Engineering University of Science and Technology of ChinaShenyang 110016China

The interfacial oxidation behavior of Cr_(4)Mo_(4) V high-speed steel(HSS)joints undergoing hot-compression bonding was investigated by using optical microscopy(OM),scanning electron microscopy(SEM),and transmission electron microscopy(TEM).In the heating and holding processes,dispersed rod-like and granularδ-Al_(2)O_(3) oxides were formed at the interface and in the matrix near the interface due to the selective oxidation and internal oxidation of Al,while irregular Si-Al-O compounds and spheroidal SiO_(2) particles were formed at the *** the post-holding treatment,SiO_(2) oxides and Si-Al-O compounds were dissolved into the matrix,andδ-Al_(2)O_(3) oxides were transformed into nanoscaleα-Al_(2)O_(3) particles,which did not deteriorate the mechanical properties of the *** formation and migration of newly-formed grain boundaries by plastic deformation and post-holding treatment were the main mechanism for interface *** tensile test results showed that the strength of the healed joints was comparable to that of the base material,and the in-situ tensile observations proved that the fracture was initiated at the grain boundary of the matrix rather than at the *** clarification of interfacial oxides and microstructure is essential for the application of hot-compression bonding of HSSs.

关键词： Hot-compression bonding High-speed steel interfacial oxides Interface healing Mechanical properties

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Leading manufacture of the large-scale weldless stainless steel forging ring:Innovative approach by the multilayer hot-compression bonding technology

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Journal of Materials Science & Technology 2021年第12期71卷 84-86页

作者： Mingyue Sun Bin Xu Bijun Xie Dianzhong Li Yiyi Li Shenyang National Laboratory for Materials Science Institute of Metal ResearchChinese Academy of SciencesShenyang110016China

Here,we report the leading manu facture of the large-scale integral weldless stainless steel forging ring(φ=15.6 m)by the multilayer additive hot-compression bonding ***,the detailed interface healing mecha nism involving interfacial oxide evolution is elucidated,which validates the feasibility and reliability of the technique we proposed.

关键词： The largest stainless steel forging ring Interface bonding interfacial oxides Multilayer additive hot-compression bonding

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