SU744048A1 - Method of tempering cutting technological tool - Google Patents

Description

P | pC | STra: nste by the Flame of Explosion of Explosion from a High-Voltage Mixture | 30Твр, m1ICHNO: a combustible gas and 1 Acid | рО | Л, а, with an echo containing GF of gas in C; 1.5-2.5 masses times the stoichiometer and hour.

The drawing shows the device, with the help of which it is local (cutting: К | ro: ms1k technolesMCiOKOiro tool.

The processed instrument I is placed in 2. After fitting the chamber into it, ino gas conductor 3 and in; into the right amount; in the required quantities, 1Only, the vryvchaty gas mix-oxygen and the combustible pelvis. P (p: i (vraive amasi nocipejcTisoiM (Feed for a sewn on a candle of 5 pulses of current (Vyuyoksich) iair jan. And from a viewer) to S13OLT: coy source of 6 waves; on 1 painted to tee 1My; Ie; Ie; Ie; Ie; I used 6); .svyu} 1ndy is iBce iarhvar-nosti, memory, go to: Measure: with the braves of the 1st .iis1runt. 000 ° / s are ingeniously heated to a hardening temperature, while the rest of the feces are set on l, the nominator yu.

Exceptionally pleasingly high s.korst (minroCTipyiKTypiHbix 1 Conversion when heated in combination with self-arbitrary quenching after an instant of hint. Tsrv raschenv on the prevani, due to the tapploopt from from one to another;), ix, ir. con | Tsensi1r-uyush | IHS IB 1P | raduktah explosion aaroz water Obeopachnvayut loluchenie; on cutting KpOMiKauX struisgury more visoyuoy mimroivardostyu and iz1noso1Stoy1K1S1Styu 1B compared with 1ST1rl1kturoy, 1pal | scientists;. Noah zazhalkoy known methods Mikroiverdost and iz1P | CCA | SToY1K the spine of the formed structures additionally has | rastaty.v | as a result; turn on 1 metastabil; n101o residual austeiyita IB maftevayt technical technical load: ke; on;

Te1M1pertura and | razmaray mary ash on the (cutting n poiMiKax are determined by tech. Nolo. Picak: i1M1I | pa, work | meT | pa.mi and f | iziko-; mechaLichas1K and: mi and properties with walk, look, ity pattern; which are assigned according to the iM: Span from the avoys of the tool material and from the gaametricheskoy shape of the cutting edges.

In order to compile a “similar brewing mixture with oxygen | M., Any kind of 1 or 1 or 3 per cent-m.h. gases can be used (other than hydrogen, methane, lrapane-butane, coke oven gas, and so on). For the purpose of lredotorotein oxidation, up to 10% of the ir tool

by heating it, an excess fuel is added to the mixture with a stoichiometric amount of combustible gas (IB 1.5-2, i5 (times).

, THE IMPLEMENTATION OF JUPSSO BA.

1. Samples (cutting tool made of steel P9 with an initial hardness of 62 HRC was placed in a ca; maru into which it was heated (the gas mixture was injected with a gas mixture consisting of 70% of hydrogen and 30% of oxygen, 1POD of pressure 10 atm. Under The explosion of the flame on the cutting plates produced a hardened layer with a depth of up to 0.5 mm, consisting of martensite, carbides and static austenite, whose microhardness was 10 and 1% higher than the original iMHKpoTBep OiCTH.

2. In a similar way, a punch of steel H12F1 was machined with an initial hardness of 58 HRC. P | p; And the 40% mixture of lrolan with -i-oxygen at an initial pressure of 8 atm was changed. As a result of the explosion of this mixture at the working edges), the puncture is O1Brazo; a quenched layer with microhardness corresponding to 66 HRC.

-The use of the proposed method of local hardening of the cutting edges of the techiological tool; ment, in comparison with known methods, provides the following 1Pr a1M): schast1B a;

a significant catch of the manufacturer "OSPI";

the possibility of terminating the strengthening of hardened (cutting edges of the tool 1 of a complex form;

providing higher operating power rates for the I1H1Strume.

F o r: m l l invention

Hardening of cutting edges of tekhnolotpcheyukop tools, including pulsed 1 right (cutting edges and cooling due to heat removal from heated goods into the metal, distinguishing it also with the fact that, in order to increase productivity, and produce IB, ip ip iped ipir ip ip ip ip ip ipr. Torsion gas, this content of combustible gas in the mixture is 1.5-2.5 times 1 higher than stoichiometric.

Sources of information taken in the biviman1ie etri ekapartize:

1.Tilova technology of thermal processing of metalworking tools, part 1, 1966, Ministerial1ST1Vostrostro1Ipolynyy 1I №N1STr of the general industry CGGP.

2. US patent number 3666252, cl. C 21 D W 1.8, 1972.

Claims (1)

Claim A method of hardening the cutting edges of a technological tool, including pulse heating of the cutting edges and cooling due to heat removal from a heated surface deep into the metal, characterized in that, in order to increase productivity, heating is carried out in a sealed chamber by a flame pulse of an explosion of a mixture of combustible gas, the content of combustible gas in the mixture is 1.5-2.5 times higher than the stoichiometric.