METHOD FOR MAKING HOLLOW ARTICLES OF REFRACTORY METALS AND ALLOYS Russian patent published in 2004 - IPC

FIELD: plastic metal working, namely manufacture of hollow articles such as tubular blanks, sleeve type articles and so on from refractory metals and alloys.

SUBSTANCE: method is realized due to introducing cold steel rod having thickened portion and coated with lubricant into heated solid blank and further removal of said rod. Thickened portion of rod is detachable one and it has diameter 1.03 -1.08 of rod diameter. Technological lubricant used for coating rod is graphite - molybdenum disulfide lubricant containing next relation of ingredients, mass %: colloidal graphite, 60 - 75; flaky graphite, 18 - 26; molybdenum disulfide, 7 - 14.

EFFECT: lowered labor and material consumption for making articles.

2 cl, 1 dwg, 1 tbl, 1 ex