Title:
DIE FOR EXTRUSION
Document Type and Number:
Japanese Patent JP2006192451
Kind Code:
A
Abstract:
To provide a die for extrusion capable of uniformly introducing refined crystal grains in a metallic material to be worked with high yield.
In the die 1 for extrusion having a slot 3 with a bent part 4 in which a stock material 2 is pressed into the slot 3 and passed therethrough, and the shear strain is given to the stock material 2 by the bent part 4, an inner bent part 5 to bend the slot 3 and an outer bent part 6 having a round-shape around a top of the inner bent part 5 are formed on the bent part 4. The bend angle Φ of the inner bent part 5 and the round-shape providing angle Ψ of the outer bent part 6 are set so that the strain of ≥1.0 is formed by ≥ 80% in terms of the sectional area ratio in the stock material 2.
Inventors:
HAMAZAKI MASANORI
Application Number:
JP2005004699A
Publication Date:
July 27, 2006
Filing Date:
January 12, 2005
Export Citation:
Assignee:
MITSUBISHI HEAVY IND LTD
International Classes:
B21C25/00; B21C23/00; B21C37/04
Attorney, Agent or Firm:
Toshiro Mitsuishi
Tadahiro Mitsuishi
Yasuyuki Tanaka
Hiroshi Matsumoto
Tadahiro Mitsuishi
Yasuyuki Tanaka
Hiroshi Matsumoto