Title:
【発明の名称】高い耐食性を持つかみそり刃用鋼,かみそり刃及びこれらのかみそり刃を製造する方法
Document Type and Number:
Japanese Patent JP2811511
Kind Code:
B2
Abstract:
Steel which is particularly useful for making a razor blade of high corrosion resistance contains more than 0.45%, but less than 0.55%, of carbon, 0.4 to 1.0% of silicon, 0.5 to 1.0% of manganese, 12 to 14% of chromium and 1.0 to 1.6% of molybdenum, all by weight, in addition to iron and inevitable impurities, and has a carbide density of 100 to 150 particles per 100 square microns as annealed. The razor blade has a Vickers hardness of at least 620 and a carbide density of 10 to 45 particles per 100 square microns, and preferably has a specific distribution of residual austenite content. The improved properties of the razor blade are achieved by an improved process of heat treatment which includes austenitizing the steel at a temperature of 1075 DEG C to 1120 DEG C, cooling it to a temperature between -60 DEG C and -80 DEG C for hardening it, and tempering it at a temperature of 250 DEG C to 400 DEG C.
Inventors:
Wolffgang Althaus
Atsushi Moriya
Atsushi Moriya
Application Number:
JP18836791A
Publication Date:
October 15, 1998
Filing Date:
April 26, 1991
Export Citation:
Assignee:
WILKINSON SWORD GESELLSCHAFT MIT BESCHRAENKTER HAFTUNG
Hitachi Metals Co., Ltd.
Hitachi Metals Co., Ltd.
International Classes:
B26B21/58; C21D6/00; C21D6/04; C21D9/18; C22C38/00; C22C38/22; (IPC1-7): C22C38/00; B26B21/58; C21D6/00; C22C38/22
Domestic Patent References:
| JP54121218A | ||||
| JP53114719A |
Attorney, Agent or Firm:
Osamu Nakahira