US1536964A - Compound for treating steel - Google Patents

Description

Patented May 5, 1925.

FRITZ n 'rz, 0F MARYsvrLLE, KANSAS.

COMPOUND FOR TREATINGSTEEL.

No Drawing theretoa hardness without causing the same to become brittle, in other words, to harden the steel without causing it to lose its toughness or flexibility, so that the metal will not chip or break.

A further important object ofthis' invention is to provide, in a manner as hereinafter set forth, a compound for hardening steel, the use of which requires no complicated procedure, the method of operation being to simply plunge the article to be treated .into the compound, after heating to the proper tempeature, and allowing the same to cool therein. 7

Although the compound can be used for treating any article desired, it has been found to be especially fine for tempering tools such as picks, axes, cold chisels, plow shares and lathe tools.

The composition embodying this invention comprises, soft water, laundry soap, brown sugar, old style cut tobacco, potassium cyanide (powdered) and beef tallow, all intimately mixed and when ready for use occurring as a plastic or semi-solid mass.

Experiment has shown that the'best results are obtained when the above named ingredients are combined in approximately the following proporti.ons:

Soft water, 5 lbs.; laundry soap, 6 bars (30 ons.) brown sugar, 4 02s.; old style cut tobacco, 2 02s.; potassium cyanide (powdered), 1 02s.; beef tallow, 3 lbs.

, The above ingredients are mixed in the following manner :-The soap is dissolved in a portion of the Water while the tobacco Application file i1 August 5, 1924. Serial No. 730,245.

is well soaked in another heated portion. of the water, which 1s tl en added to the soap solution. The brown sugar, previously dis solved in another portion ofthe water, is then added together with the dissolved potassium cyanide. The t-allow is melted and added while hot to the mixture, which is then boiled for twenty minutes, with constant stinking. r

The. compound is then allowed to cool, with frequent stirring to prevent separation of the ingredients, and when completely congealed a semi-solid plastic mass results. Experiment has disclosed that the brown sugar and tobacco cause the metal to have a toughness and hardness obtainable from no other substances. The potassium cyanide and beeftallow also harden the metal to a durable temper, while the soap and water.

give a proper body to the mixture, which thus avoiding brittleness.

' When themass has been cooled and set it is ready for use without further preparation, and the article to be treated, after heating to the proper temperature, is plunged into the mass and allowed to cool therein, and

water, substantially. as set forth.

2. A metal treating compound ofthe char- I acter set forth, comprising the following ingred ents 1n approximately thefollowing proportions ;laundry soap 3O ounces,brown sugar 4 ounces, old style cut tobacco 2 ounces, potassium cyanide (powdered) 1 ounces, beef tallow f8 ounces and soft water 80 ounces. 7 p

In testimony whereof, I aflix my signature hereto.

FRITZ N ETZ.

. as a result the article will be properly temprevents too rapid hardening of the steel, 70