SU794086A1 - Wear-resistant cast iron - Google Patents

Description

cheni high operational durability of parts made from it, working under conditions of active shock-abrasive wear.

In the induction furnace, three test melts of the proposed cast iron were melted. In tab. 1 shows the chemical composition of this iron.

Table 1

At the end of the crystallization process and rapid cooling in air, the blades cast from these alloys were subjected to triple tempering for 1 h at 520-540 ° C. After heat treatment, the HRC hardness was measured and the wear resistance of the experimental alloys under conditions of active shock-abrasive wear was investigated. After operation, the surface hardness of the blades was 65–67 HRC.

For a known alloy, the following heat treatment mode was used: quenching from a temperature of 930 ° C, tempering at 180-200 ° C for 2 hours to relieve stress.

The research results showed that the tested alloy has a high operational durability under conditions of active

not on shot-blasters 393M with a capacity of 160 kgf / min. As part of the fraction with a diameter of 2-5 mm from bleached cast iron was up to 2% quartz molding sand. In tab. 2 shows the mechanical properties of the alloys and their operational durability.

table 2

shock-abrasive wear and high mechanical properties.

In tab. Figure 3 shows the data on wear under conditions of active shock-abrasive wear in full-scale products after 1 h of operation. The hardness of known iron is 59-64 HRC.

The proposed composition of cast iron is significantly superior to the well-known impact-abrasive wear resistance.

Claims (1)

1. USSR Author's Certificate No. 572528, cl. From 22C 37/10, 1976. 2, USSR Author's Certificate No. 449981, cl. C 22C 37/08, 1973.