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2 606 665

(13)

(51)

IPC

C21D1/22(2006-01-01)

C21D1/56(2006-01-01)

C22C38/00(2006-01-01)

(21) (22)

Application

2015126908, 2015-07-06

(24)

Start date

2015-07-06

(22)

Actual filing date

2015-07-06

(45)

Published

2017-01-10

(72)

Inventor

Chertovskikh Evgenij OlegovichOkolovich Gennadij AndreevichGabets Aleksandr Valerevich

(73)

Holder

Obshchestvo S Ogranichennoj Otvetstvennostyu Stalelitejnyj Zavod"

METHOD OF CAST STEEL PARTS CONTROLLED THERMAL TREATMENT Russian patent published in 2017 - IPC C21D1/22 C21D1/56 C22C38/00

Abstract RU 2606665 C1

FIELD: metallurgy.

SUBSTANCE: invention relates to metallurgy and machine building. To increase cold resistance (impact strength) of railway cars steel cast parts following is successively performed: part heating to 860÷940 °C with holding, accelerated cooling at rate of 1÷25 °C/s to 400÷450 °C in air flow and isothermal self-tempering at room temperature. Weight of part from 20GL or 20G1FL steel is chosen so, that at its isothermal self-tempering at room temperature, part surface temperature reaches not less than 550 °C and not more than 650°C, wherein part heating is performed at rate of 5÷30 °C/min.

EFFECT: higher cold resistance (impact strength) of railway cars steel cast parts.

4 cl, 7 dwg, 2 tbl

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RU 2 606 665 C1

Authors

Chertovskikh Evgenij Olegovich

Okolovich Gennadij Andreevich

Gabets Aleksandr Valerevich

Dates

2017-01-10—Published

2015-07-06—Filed