DE1294679B - Use of a stainless steel alloy with high hardness for razor blades - Google Patents

Description

The invention relates to stainless steel razor blades. The use of stainless Steel alloys for razor blades are known. The typical composition already used Steel is: 1% carbon, 13% chromium, 1% manganese, 0.15% silicon, the remainder iron.

Hardenable austenitic stainless steel alloys which additionally contain nickel, e.g. B. in
Ratio 18% chromium, 8% nickel, are also
known per se and were used in cases where the following examples I to V result:

With higher contents of silicon, cobalt and molybdenum it may be necessary to reduce the contents of chromium, Adjust nickel and manganese so that the austenite remains resistant. Though razor blades made of austenitic stainless steels, which can be hardened to a hardness of over 500 Vickers, largely are satisfactory, steel alloys are preferred which have a hardness of over 600 Vickers is achievable, as can be seen from the

where high temperature strength or higher corrosion resistance was required. However, they weren't used for razor blades. C.

The invention is based on the task of creating a ^ j _n

Razor blade with higher corrosion resistance and 15 Si greater strength than previously with stainless razor Ni

sound achievable to achieve.

However, this can not be readily achieved by using thermosetting austenitic stainless steel alloys q. The reason for this is that the hardness of such alloys in the form of a band is so great that significant difficulties arise in attempting to shape the edge of the band in a conventional manner.

The new technical success of the invention consists in the use of a combination of curable austenitic stainless steel alloys which have been treated to be essential Contains a proportion of martensite, which makes the razor blades harder than the known ones stainless blades is possible, and in the at least partial generation of the cutting edge by an electrolytic Process so that the difficulties of cutting edges on the very hard material are avoided will. C.

According to the invention, an austenitic, stainless Mn

Steel alloy with a hardness of at least Si

500 Vickers and a considerable amount of martensite, consisting of

Example I.

0.1 Cr

0.45 P.

0.37

7.5

17.0

0.03

S 0.025

Mn Si

Example II

0.1 Cr.

0.65 P ..

0.37 p. 8.5

Example III

0.09 Ni

1.25 Cr.

1.15 mo

Mn Si

Example IV

0.10 Ni

8.40

0.50

Cr

Example V

0.14 Ni

0.6 Cr,

0.4

18.0 0.03 0.025

8.0

17.0

0.7

2.30 17.0

7 17.5

0 to 0.25%, preferably

0.05 to 0.15% carbon, 15 to 20%, preferably 16 to 19% chromium, 5 to 10%, preferably 6 to 9% nickel,

0 to 10% manganese, with the nickel content in the manganese content exceeding 2% should be reduced by 0.5% for every additional percent manganese,

Obis 2% silicon,

Obis 5% molybdenum,

Obis 0.06% sulfur,

Obis 0.05% phosphorus,

Obis 10% cobalt,

Obis 0.03% nitrogen,

Obis 2% niobium,

0 to 1% tungsten, copper, vanadium, aluminum, tantalum, titanium,

Remainder iron,

Hardening can be done mechanically, e.g. B. by rolling or by sudden Deformation using explosives (explosive deformation), with partial or total deformation can be done.

The mechanical curing is conducted normally at room temperature, generally at temperatures between -200 and +100 ⁰ C. When hardening, a significant amount of martensite is usually formed as a decomposition product of the austenite.

To increase the hardness, heat treatment at temperatures between approximately 350 and 460 ° C can be used can be applied.

During the electrolytic production of the cutting edges, the razor blade blanks can still be inserted usually related in ribbon form. It is particularly advantageous to make the cutting edges electrolytically to produce or sharpen.

The razor blades are to improve shaving with a coating or with fabric particles

60 provided.

The invention used for razor blades

the material dete mechanically at a temperature has a high strength and high

between -200 and +100 ⁰ C by rolling or corrosion resistance.

by sudden deformation by means of explosives in addition to the conventional razor blades is hardened, as a material for razor blades, the invention is also applied to band-shaped razors, the cutting edges of which sound electrolytically, in which the following strip sections for Finished and coated with a shave or shave serve as soon as a previous section lightening fabric particles are provided. is worn out. The high achievable according to the invention

Corrosion resistance is particularly desirable for this.

Claims (1)

Claim: Using a stainless steel alloy with a hardness of at least 500 Vickers a significant part of the structure of martensite, consisting of ίο 0 to 0.25%, preferably 0.05 to 0.15% carbon,
15 to 20%, preferably 16 to 19% chromium,
5 to 10%, preferably 6 to 9% nickel,
0 to 10% manganese, with the nickel content being reduced by 0.5% for each additional percent manganese if the manganese content exceeds 2%, Obis 2% silicon, Obis 5% molybdenum, Obis 0.06% sulfur, Obis 0.05% phosphorus, 0 to 10% cobalt, Obis 0.3% nitrogen, Obis 2% niobium, each 0 to 1% tungsten, copper, vanadium, Aluminum, tantalum, titanium,
Remainder iron, which is mechanically hardened at a temperature between -200 and +100 ⁰ C, such as by rolling or by sudden deformation by means of explosives, as a material for razor blades of conventional or strip-shaped appearance, the cutting edges of which are electrolytically pre-machined or finished and with a coating or shaving-relieving material particles are provided.