SU763482A1 - Wear-resistant concrete - Google Patents

Description

one

The invention relates to ferrous metallurgy and can be used in machine-building industry for the manufacture of parts with gaseous and abrasive wear.

Known wear-resistant cast iron 1 of the following chemical composition -) 0 VA, wt.%:

Carbon 2.82-3.67

Silicon 0.48-0.58

Manganese 0.42-0.47

Chromium 12.6-19,

Nickel 0.32-0.52

Vanadium 0.13-0.3

Molybdenum 0,19-0,5

Titanium 0.03-0.07

Phosphorus 0.09-0.11.20

Sulfur 0.03-0.033

Iron Else

Cast iron is used for blades of shot-blasting machines; it has high wear resistance.25

The closest to the described technical essence and the achieved result is wear-resistant cast iron 2 of the following chemical composition, weight%; 30

Carbon 2.7-3.2 Silicon 0.8-1.2

Manganese 0.3-0.6

Chrome 12-16

Nickel 0.8-1.2

Molybdenum 0.3-0.6

Vanadium. 0.3-0.6

Titanium 0.08-0.12

Iron Else As impurities, cast iron contains phosphorus up to O, 1 wt.% / Sulfur to 0.06 wt.%.

Cast iron has the following properties

Strength at

52-72 bending, kg / mm Shock viscosity,

0.35-0.55 kgf / cm 57-60 Hardness HR {,

A disadvantage of the known cast iron is low toughness.

The purpose of the invention is to increase the toughness.

The goal is achieved by the fact that cast iron containing carbon, silicon, manganese, chromium, nickel, molybdenum, vanadium, titanium, additionally contains copper and magnesium in the following ratio of ingredients, wt.%:

Carbon 0

Silicon 0.8-1.5

Manganese 1.5-3.0

Chrome 15-28

Nickel 1.5-3.0

Molybdenum 0.2-0.8

Vanadium 0., 2-0,6

Titanium 0.06-0.09

Copper - 1.5-3.0

Magnesium 0.5-0.9

Iron Else

For laboratory studies, a melt was carried out, from which samples were selected and manufactured for testing their mechanical characteristics and gaseous wear.

Samples have the characteristics given in table. one.

For the gas abrasive wear test, 3 samples were made which were subjected to abrasive dust blowing.

The composition of the samples is given in table.

Bleached test pieces are hard

on LDC 55-60, when purging them with air with abrasive dust, no signs of wear were found. Wear is determined by weighing samples before and after purging. Having blown with abrasive dust, it is produced at an angle of attack from 35 to 90 ° for 20 hours. Thus, the made filling apparatus of the proposed alloy has high anti-abrasion resistance.

The economic effect of the implementation of the invention is achieved by increasing the resistance of the charging apparatus to reduce the overhaul periods by replacing them, increasing the output of cast iron (saving is 67224 r / only for one blast furnace). The saving is 67224 r / g for each blast furnace only).

The proposed cast iron can be used in other industries in the manufacture of parts operating under gas abrasion conditions.

Table

Content of elements,%

2.2 2.6 2.8

Table of shot shot throwers. -LITHUANIAN MANUFACTURE, 1978, No. 5, p. 32. 2. Kitygora N.I. and Kislov A.K. Optimal technological processes and progressive equipment in the foundry industry, M., Minstankoprom, VTILITPROM, 1967.

Claims (1)

Claim Wear-resistant cast iron containing carbon, silicon, manganese, chromium, nickel, molybdenum, vanadium, titanium and iron, characterized in that, in order to increase the toughness, it additionally contains copper and magnesium in the following ratio of components, weight%: Carbon 2.5-3.0 Silicon 0.8-1.5 Manganese 1.5-3.0 Chromium 15-28 Nickel . 1,5-3 Molybdenum 0.2-0.8 Vanadium 0.2-0.6 Titanium 0.06-0.09 Copper 1.5-3.0 Magnesium 0.5-0.9 Iron Rest