Method of determining components of a welding material having be

Details Method of determining components of a welding material having be Method of determining components of a welding material having be

1995-03-28

1997-04-22

Yee, Deborah

Metal treatment

Process of modifying or maintaining internal physical...

Producing or treating layered, bonded, welded, or...

148578, 228160, 228231, C21D 118, C23C 600

Patent

active

056225733

ABSTRACT:
A welding material for hard-facing which is to be hardened by a supercooling treatment after overlaying onto a cast iron base metal has a basic component composition which meets, in an overlaid condition, both a first condition and a second condition. The first condition is that a nickel (Ni) equivalent and a chromium (Cr) equivalent fall within that region to be defined in Schaeffler's structure diagram in which a difference in hardness before and after the supercooling treatment is a predetermined value or above. The second condition is that a starting temperature of martensitic transformation is a predetermined temperature or below. The components of the welding material are determined by defining in Schaeffler's structure diagram a region in which a difference in hardness before and after the supercooling treatment becomes a predetermined value or above, obtaining a target composition in which the Ni equivalent and the Cr equivalent fall within the region and in which the starting temperature of martensitic transformation is a predetermined temperature or below, and determining the composition of basic components such that the target composition is attained in an overlaid condition.

REFERENCES:
patent: 4902473 (1990-02-01), Arata et al.
patent: 5361968 (1994-11-01), Tanaka et al.
Great Britain Search Report; Application No. GB 9507418.3; Dated Jul. 31, 1995.

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