SU1337436A1 - Steel - Google Patents

Abstract

The invention relates to the field of metallurgy, in particular to the search for wear-resistant steels for parts of the working bodies of earth-moving and construction machines. The purpose of the invention is to increase wear resistance at low temperatures. To improve these characteristics, the steel additionally contains zirconium and calcium. The steel has the following chemical composition, wt.%: Carbon 0.4-0.6; silicon 0.8-1.7; manganese 0.4-0.8} chromium 0.6-2.0; molybdenum 0.1-0.8; aluminum 0.2-1.0; copper 0.05-0.4; zirconium 0.05-0.25; calcium 0.01-0.05; iron - the rest. 2 tab. from 00 oo O5

Description

s

113374362

The invention relates to metallurgy when for 2 hours; for hygiene, in particular, to change the wear of the proposed steel - in quenching from resistant steels for the manufacture of working bodies of earth-moving and construction machines.

The purpose of the invention is to increase the wear resistance at low temperatures.

The top of the steel was carried out in an induction furnace with a capacity of 160 kg using appropriate ferro-plaster;

BOB

In the process of fractional casting

 in oil and tempering at 520 ° С for 2 h.

In tab. 2 shows the mechanical properties of the proposed and famous steel.

Claims (1)

Invention Formula Steel containing carbon, silicon, manganese, chromium, molybdenum, al Experimental compositions of steel were treated with 15 min., iron, about tl and h with various additives introduced by the element so as to increase. This allowed us to obtain experimental compositions of steel, are given in table.1. When testing for wear resistance at low temperatures, steel 45 with a hardness of HV 520–580 was taken as a counter sample. The impact energy was taken to be E 1 J, the number of blows N 2000, the test temperature was 40 ° C. The test results are shown in Table. one. Heat treatment of the studied samples was for the well-known steel in quenching from in oil and from 0, 4 0,4 0.8 0.6 0.1 start at 2 hours; for the proposed steel - hardened from  in oil and tempering at 520 ° С for 2 h. In tab. 2 shows the mechanical properties of the proposed and famous steel. Invention Formula Steel containing carbon, silicon, manganese, chromium, molybdenum, and alu nium wear resistance at negative temperatures, it additionally contains zirconium and calcium in the following ratio of components, wt.%; five 0 Carbon Silicon Manganese Chromium Molybdenum Aluminum Copper Zirconium Calcium Iron 0.4-0.6 0.8-1.7 0.4-0.8 0.6-2.0 0.1-0.8 0.2-1.0 .0.05-0.4 0.05-0.25 0.01-0.05 Rest Table 1 0.2 0.05 0.05 0.01 Ostal- 1.1 a little