IN2014KO00090A - - Google Patents

Abstract

The invention relates to an improved universal testing machine (UTM),capable of performing tension and compression test at high temperature to provide an accurate hot-hardness values of a test specimen, the universal testing machine (UTM) (1) comprising a split furnace (8) to raise temperature of a specimen (4) under hot harness test; an indentor holder (6) attached to pull rods (2) of the UTM through a first threaded coupling (9); a specimen anvil (3) attached to bottom of said pull rods (2) via a second threaded coupling (9); a cross head assembly (10) having a cooling circuit (7) to restrict heat transfer to a load cell disposed on said cross head assembly (10); and at least one tungster carbide ball (5) attached to said pull rods (2) for Brinell hardness testing of the specimen at high temperature; The improvement is characterized in that the specimen anvil (3), and the indentor holder (6) constituting a holding device is modified to be a separately mountable device on the UTM (1) to allow conducting a plurality of testing of specimen, in that the specimen anvil (3) is made from tool steel and machined flat corresponding to the dimension of the pull rods (2), in that the stem of the indentor holder (6) is machined to a dimension to allow attachment with the pull rods (2) including an accurate alignment of the anvil (3) and the indentor holder (6), and in that means for continuous purging of nitrogen gas into the split furnace (8) to restrict oxidation of the specimen under high temperature, is provided.