Kajian tentang Struktur Mikro dan sifat mekanikal sambungan kimpalan laser aloi titanium 1.5mm Ti-6Al-4V

Kata kunci:Aloi titanium Ti-6Al-4V/ kimpalan laser / struktur mikro / sifat mekanikal

Pengarang: Fu Heguo, Liu Guangxin, Xie Hongzhi, Jiang Wentong, dll

Shenyang Aircraft Industry Group Co., Ltd

Sumber: kimpalan dan pemotongan

Abstrak: eksperimen kimpalan laser ditambah kimpalan pengubahsuaian permukaan 1.5mmAloi titanium Ti-6Al-4V was carried out, and the microstructure and static properties of the joint were observed. The results show that due to the influence of different welding thermal cycles, The structure area of laser welding plus surface modification welding joint can be divided into a base metal area, heat affected area, equiaxed crystal area at the bottom of weld, and columnar crystal area at the top of the weld, there is widmanstatten structure in the weld structure, With the increase of the distance from the fusion line, the microstructure of the heat-affected zone increases ' The volume fraction decreased gradually.

Sifat mekanikal sendi menunjukkan bahawa kekuatan tegangan dan kekuatan ricih adalah bersamaan dengan logam asas, dan sudut lentur minimum ialah 35 darjah, menunjukkan bahawa sambungan boleh digunakan dalam kejuruteraan.

Morfologi sambungan kimpalan aloi titanium Ti-6Al-4V

Struktur mikro zon kimpalan

Morfologi struktur mikro kawasan berbeza dalam zon terjejas haba

Nilai ujian sifat mekanikal sendi

Nilai purata sifat mekanikal sendi