Welding consumables developed for the new austenitic heat-resistant steel HR3C include YT-HR3C and Ni-based consumables

the Ni-based consumables include ERNiCrCoMo-1

ERNiCr-3 and ERNiCrMo-3. It needs to strictly control the welding process in order to prevent thermal cracks during welding

the key is to control the interlayer temperature of welding ≤100 ℃

with aging time at different temperatures

the weld structure of the welded joint have no change

is single austenite structure（γ phase）

but the number

morphology and distribution of precipitated phases Cr

23

C

6

CrFe

7

C

0.45

（Cr

Fe）7C

3

CrNbN and Cu-rich phases change

a large amount of precipitation of Cr

23

C

6

leads to a sharp decline in the impact energy of the joint

behave aging embrittlement.This article mainly reviews the research development on welding consumables

welding processes and weld joint performance of HR3C.