Low expansion cast iron lapping tool

Details Low expansion cast iron lapping tool Low expansion cast iron lapping tool

1990-03-14

1991-07-09

Yee, Deborah

Metal treatment

Stock

Ferrous

420 95, 420 27, 51293, 51DIG6, 148905, C22C 3700

Patent

active

050302990

ABSTRACT:
A lapping tool with a flatness in the range below 20 .mu.m which is made of at least cast iron having an austenitic matrix and consisting essentially of from 1% up to 3.5% carbon, up to 1.5% silicon, from 32% to 39.5% nickel, from 1% to less than 4% cobalt, up to 41% of the combined total of nickel plus cobalt and the balance substantially all iron providing a low expansion coefficient, good castability, good cutting properties and good damping capacity. (By % is meant % by weight).

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