Pulsed Nd:YAG laser welding of copper using oxygenated assist gases

被引：57

作者：

Biro, E ^{[1
]}

Weckman, DC ^{[1
]}

Zhou, Y ^{[1
]}

机构：

[1] Univ Waterloo, Dept Mech Engn, Waterloo, ON N2L 3G1, Canada

来源：

METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE | 2002年 / 33卷 / 07期

关键词：

D O I：

10.1007/s11661-002-0034-4

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The effects of using oxygenated assist gases on the weldability and weld properties of Nd:YAG, pulsed laser welds in copper (Cu) have been evaluated. It was found that the effective absorptivity of the Cu increased as the oxygen content of the Ar assist gas was increased. This facilitated laser welding of Cu at much lower laser powers and increased weld penetration. The use of oxygenated assist gas promoted nucleation and growth of submicroscopic oxide particles within the weld metal. These particles dispersion-strengthened the weld metal, thereby increasing both weld metal hardness and strength. However, when O-2 concentrations in the assist gas were greater than 90 pet, weld metal embrittlement due to excessive volume fractions of oxides was observed. The use of oxygenated assist gas also led to excessive cold lapping and poor bead quality. The bead quality was improved, however, by ramping-down the laser power before terminating each pulse.

引用

页码：2019 / 2030

页数：12

共 34 条

[1]

[Anonymous], 1990, METALS HDB

[2] The effects of Ni and Au/Ni platings on laser welding of thin sheets [J].

Biro, E ;

Zhou, Y ;

Weckman, DC ;

Ely, KJ .

JOURNAL OF LASER APPLICATIONS, 2001, 13 (03) :96-104

[3]

BRANTLEY CF, 1994, J DENT RES, V73, P141

[4]

Daurelio G., 1991, MATER MANUF PROCESS, V6, P577

[5] FAILURE ANALYSIS OF POWER MODULES - A LOOK AT THE PACKAGING AND RELIABILITY OF LARGE IGBTS [J].

DELAMBILLY, H ;

KESER, HO .

IEEE TRANSACTIONS ON COMPONENTS HYBRIDS AND MANUFACTURING TECHNOLOGY, 1993, 16 (04) :412-417

[6]

Dell'erba M., 1986, P 5 INT C APPL LAS E, P57

[7] CO2-LASER WELDING OF COPPER SLABS [J].

DELLERBA, M .

OPTICS AND LASER TECHNOLOGY, 1985, 17 (05) :261-262

[8]

Duley W.W., 1999, LASER WELDING

[9]

GOUVEIA H, 1994, WELD REV INT, V13, P272

[10]

Gouveia H., 1994, WELD REV INT, V13, P266

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