保护气成分对<strong>1000 MPa</strong>级高强熔敷金属组织特征的影响

保护气成分对1000 MPa级高强熔敷金属组织特征的影响

安同邦,魏金山,单际国,田志凌

Influence of Shielding Gas Composition on Microstructure Characteristics of 1000 MPa Grade Deposited Metals

Tongbang AN,Jinshan WEI,Jiguo SHAN,Zhiling TIAN

表3 不同保护气熔敷金属中夹杂物统计

Table 3 General characteristics of inclusions observed in deposited metals with different shielding gases

Shielding gas	Average diameter μm	Maximum size μm	Number density 10⁴mm^-2	Area fraction %
95%Ar+5%CO₂	0.3316	1.118	10.0	0.08
90%Ar+10%CO₂	0.4023	1.365	9.8	0.13
80%Ar+20%CO₂	0.4137	1.408	12.3	0.20
70%Ar+30%CO₂	0.4338	1.447	12.9	0.22