Recent Developments

Roll compacting of metal powders into strip is a relatively new process. Research and development currently is being conducted on many different materials to produce a superior material as well as to achieve properties not possible with conventional ingot metallurgy (Ref 12).

Phuéii Liypi

Roll compacting is especially useful for the continuous and semicontinuous preparation of special-type strip and sheet materials including the following:

• Ni-base strip applications

• Stainless steel and copper strip (Ref 6)

Iron strip made from high-purity iron powder has produced a low-carbon sheet with properties equivalent to those of conventional low-carbon sheet steel for production of containers for consumer goods. The following are typical properties of thin-gage roll-compacted low-carbon iron powder:

Gage

0.30 mm (0.012 in.)

Yield strength

290 MPa (42 ksi)

Tensile strength

330 MPa (48 ksi)

Elongation

34%

ASTM grain size

11-12

Limiting draw ratio

2.10

Strain ratio

1.3-1.6

Earing

3%

Work hardening exponent

Source: Ref 14

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