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US 12,623,306 B2Granted
MIG welding method
AssigneeJfe Steel Corporation
InventorsKyohei Konishi, Chikaumi Sawanishi, Hiroshi Matsuda, Yoshiaki Murakami
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Abstract
A MIG welding method for carbon steels using an Ar shielding gas. The method includes short-circuiting a welding wire and a base material. The average short-circuiting frequency in welding is 20 Hz to 300 Hz and the maximum short-circuiting period is 1.5 s or less.
Claims4
A MIG welding method for carbon steels using an Ar shielding gas that includes a volume fraction of Ar of more than 99%, the method comprising:
- short-circuiting a welding wire and a base material, wherein:
- an average short-circuiting frequency in welding is in a range of 20 Hz to 300 Hz, and
- a maximum short-circuiting period is 1.5 s or less, and
- a welding current in the welding is a pulse current and a value X calculated by the following formula (1) satisfies 50≤X≤250:
- X=Iptp/L+(Ip+Ib)(tup+tdown)/(2L) (1)
- where, Ip is a peak current (A), Ib is a base current (A), tp is a peak term (ms), tup is a rise term (ms), tdown is a fall term (ms), and L is a distance (mm) between a contact tip and the base material.
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Dependencies are inferred from the claim text.