SU955726A1 - Charge for making iron-base sintered articles - Google Patents

Abstract

DIHXTA FOR MANUFACTURING SILENCED PRODUCTS ON THE BASIS OF IRON, containing steel powder, carbon and iron powder, characterized in that, in order to improve the physical and mechanical properties of sintered products, it additionally contains copper with the following ratio of components, wt.%: Steel powder 10-40 Carbon0.9-1.5 Copper1.5-4.0 Iron powder Else

Description

The invention relates to the field of powder metallurgy, in particular, to powder mixtures used to make sintered structural materials based on iron powder.

A known charge for the manufacture of sintered iron-based products containing steel waste and carbon black in an amount equivalent to the oxygen content of the steel powder.

The disadvantages of this mixture are the low mechanical properties of sintered products.

Closest to the invention to the technical essence and the achieved effect is the charge for the manufacture of sintered iron-based products of the following composition, wt.%:

Iron powder 49.2

Steel powder 50.0

CarbonEverything Else

The disadvantages of the known charge are unsatisfactory physical and mechanical properties of the sintered products manufactured.

with

Sintered products made

JV of the known charge, have the following

SP physical and mechanical properties:

Density, g / cm 6,6 Porosity, Z15,4

Tensile strength ;

for stretching, kg / mm 35.0. Relative elongation,% O 62 Flexural strength, kg / mm 70.0 Hardness HE125 The aim of the invention is to improve the physicomechanical properties of sintered products.

To achieve this goal, a mixture has been proposed for the manufacture of sintered iron-based products.

containing steel powder, carbon and iron powder, which differs from the known mixture in that it additionally contains copper in the following ratio of components, wt.% Steel powder 10-40 Carbon. 0.9-1.5 Copper 1.5-4.0

Iron powder

Rest

Example. The mixture of powders of the initial components was pressed at a specific pressure of 7 t / cm, the blanks were sintered at a temperature of 1100t20 ° C for. 2 h in the environment of hydrogen.

The table shows the composition of the proposed mixture and the properties of sintered i-fs products.

As follows from the data given in Table 1; 1, the data proposed in comparison with the known charge provides for the reduction of the physicomechanical properties of sintered iron-based products.

Claims (1)

FIR OF THE DAY OF PRODUCTION OF SINTERED ITEMS ON THE BASIS OF IRON, containing steel powder, carbon and iron powder, based on the fact that, in order to increase the physicomechanical properties of sintered products, it additionally contains copper at the following ratio of components, wt.%: Steel powder 10-40 Carbon 0.9-1.5 Copper 1.5-4.0 Iron powder Rest