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Plasma arc fusion-pressure welding of Al-ZrO2 system composite synthesized by XD method

Zhang Deku ; Nanjing
Zhu Heguo
Huang Yi
Zhang Wenjun

Puni tekst: engleski PDF 1.063 Kb

str. 33-38

preuzimanja: 524



In this paper, an Al-ZrO2 system composite
synthesized by XD method is welded by a new
plasma arc fusion-pressure welding method. Their
joint forms and microstructures are investigated.
The results show that the optimum process
parameters for the Al-ZrO2 System composite
(Ф7mm) are as follows: welding current is 150A
and welding time is 2s, no adding filling materials,
spring upset force is 2.45N. There are no defects
such as large gas pore, micro-hole, or incomplete
fusion in the joint. During the solidification of the
molten pool, the melted Zr3Al grows fully along the
minimum growing energy direction <110>, thus
the slender stick precipitates of Zr3Al appear in the
weld. The joint form and the microstructure are
affected by the processing parameters such as
welding current. For example, a larger current will
cause the defect of micro-hole in the joint.

Ključne riječi

composite material, plasma arc, fusion-pressure welding

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