Plastic molding steel having improved resistance to corrosion by

Details Plastic molding steel having improved resistance to corrosion by Plastic molding steel having improved resistance to corrosion by

1978-11-27

1980-10-14

Rutledge, L. Dewayne

Specialized metallurgical processes, compositions for use therei

Processes

Free metal or alloy reductant contains magnesium

75128A, 75128B, 75128E, 75128P, 75128R, 75128W, 75128V, 148 38, C21D 900, C22C 3920

Patent

active

042279232

ABSTRACT:
A steel which is suitable for the material of a mold used for plastic molding and which has an improved resistance to corrosion under exposure to a halogen gas generated in injection molding of a thermoplastic synthetic resin blended with a halogen-containing flame-retarding agent is obtained by shaping a steel which consists essentially of up to 0.05% carbon, up to 1.0% silicon, up to 2.0% manganese, 5.0-8.0% nickel, 11.0-15.0% chromium, 1.0-4.0% molybdenum, 0.5-4.0% copper, 0.5-2.0% cobalt and the balance iron into a mold, and then subjecting the mold to age-hardening treatment at a temperature in the range of 400.degree.-450.degree. C. to obtain a hardness of H.sub.R C 30 or higher. The steel may further contain a small, predetermined amount of at least one machinability-improving component such as lead, tellurium, calcium and bismuth and/or a small, predetermined amount of at least one toughness or hardness-improving component such as tungsten, boron, titanium, vanadium, niobium and tantalum.

REFERENCES:
patent: 2009713 (1935-07-01), Palmer
patent: 2553330 (1951-05-01), Post et al.
patent: 3512960 (1970-05-01), Brady et al.
patent: 3574601 (1971-04-01), Myers et al.
patent: 3658513 (1972-04-01), Clarke, Jr.
patent: 3915756 (1975-10-01), Oda et al.
Merriman, "A Dictionary of Metallurgy" 1958, pp. 180-181.
Stahlschlussel, 10th Ed., 1974, p. 6.

Affiliated with

Also associated with

Rating

Plastic molding steel having improved resistance to corrosion by does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Plastic molding steel having improved resistance to corrosion by, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Plastic molding steel having improved resistance to corrosion by will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2099376