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2 008 995

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IPC

(21) (22)

Application

4864479/27, 1990-06-05

(22)

Actual filing date

1990-06-05

(45)

Published

1994-03-15

(72)

Inventor

Poksevatkin M.I.Oskolkov A.I.Peretjat'Ko V.N.Kuznetsov A.A.Shmidt R.Ja.

(73)

Holder

Poksevatkin Mikhail IvanovichOskolkov Aleksandr IvanovichPeretjat'Ko Vladimir NikolaevichKuznetsov Anatolij AndreevichShmidt Rudol'F Jakovlevich

METHOD FOR HOT FORGING HOLLOW PARTS Russian patent published in 1994 - IPC

Abstract RU 2008995 C1

FIELD: plastic metal working. SUBSTANCE: bar is preliminary cleaned and washed. It is heated up to the temperature of physical oil absorption. The oil is applied. The bar is heated up to the forging temperature. Ball-type blanks are made by helical rolling. The diameter of the resulting blanks at the forging temperature is larger than the cross size of the die by a value of blank metal thermal expansion. After the hollow part is forged it is cooled. The cooling begins at the temperature of recrystallization at a rate of 50. . . 100 C/hour. EFFECT: improved quality.

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RU 2 008 995 C1

Authors

Poksevatkin M.I.

Oskolkov A.I.

Peretjat'Ko V.N.

Kuznetsov A.A.

Shmidt R.Ja.

Dates

1994-03-15—Published

1990-06-05—Filed