CN104195420A - High-chrome wear-resistant cast iron material and heat treatment method - Google Patents

Abstract

The invention discloses a high-chrome wear-resistant cast iron material and a heat treatment method. The high-chrome wear-resistant cast iron material is prepared from iron as a main raw material, and carbon, silicon, manganese, sulphur, phosphorus, chrome, molybdenum, nickel and copper as auxiliary materials in manners of melting and casting after preparation. High-chrome wear-resistant cast iron material melt is characterized by comprising the following chemical components in percentage by weight: 2.9-3.1% of C, 0.5-0.8% of Si, 0.8-1.0% of Mn, 0.02-0.05% of S, 0.02-0.05% of P, 19-21% of Cr, 1.7-1.9% of Mo, 0.5-0.7 of Ni, 0.2-0.5% of Cu and the balance of Fe. According to the high-chrome wear-resistant cast iron material, the performance and the using effect of high-chrome cast iron are improved, so that the yield in the fields of metallurgy, mine, building materials, coal mine and the like is increased, the service cycle of equipment is prolonged, and the production efficiency is greatly improved.

Description

A kind of rich chromium cast iron high-abrasive material and heat treating method

Technical field

The invention belongs to metallic substance technical field, be specifically related to a kind of rich chromium cast iron high-abrasive material and heat treating method.

Background technology

As everyone knows, along with the develop rapidly of modernization construction, must rely on the universal and application of modern engineering equipment.And the fields such as metallurgy, mine, building materials, colliery are more and more higher to the requirement of rich chromium cast iron high-abrasive material, not only need good wear resisting property also impact performance have very high requirement, therefore constantly research and to improve performance and the result of use of rich chromium cast iron most important.

Summary of the invention

The object of this invention is to provide a kind of rich chromium cast iron high-abrasive material and heat treating method, improve performance and the result of use of rich chromium cast iron, thereby increase the field output such as metallurgy, mine, building materials, colliery, the life cycle of extension device, is greatly enhanced production efficiency.

Technical scheme of the present invention is as follows:

A rich chromium cast iron high-abrasive material, take iron as main raw material, and to be equipped with carbon, silicon, manganese, sulphur, phosphorus, chromium, molybdenum, nickel, copper be auxiliary material, and after preparation, melting and casting forms, and it is characterized in that, in liquation, each chemical component weight percentage ratio is specially:

C 2.9-3.1%, Si 0.5-0.8%, Mn 0.8-1.0%, S 0.02-0.05%, P 0.02-0.05%, Cr 19-21%, Mo 1.7-1.9%, Ni 0.5-0.7%, Cu 0.2-0.5%, surplus is Fe.

A rich chromium cast iron high-abrasive material, each chemical component weight percentage ratio is specially:

C?3.0%，Si?0.7%，Mn?0.85%，S?0.03%，P?0.035%，Cr?20%，Mo?1.8%，Ni?0.7%，Cu?0.4%，?Fe?72.49%。

Rich chromium cast iron high-abrasive material and a heat treating method, include following operation steps:

After preparing according to above-mentioned each chemical component weight percentage ratio, with melting in intermediate frequency vacuum induction furnace, by fusing after pouring molten steel in sand mold, be incubated cooling rear taking-up foundry goods, then remove dead head postheat treatment, the 650 ℃ of insulations 3 hours of quenching, temperature is raised to 1020 ℃ of insulations 2 hours, temperature drops to 980 ℃ of insulations, and after 8 hours, air cooling is to room temperature, and then after 10 hours, air cooling is to room temperature in tempered 480 ℃ of insulations, and its temperature rise rate is all 50 ℃/h.

The rich chromium cast iron wearing piece of producing through the present invention, hardness can reach 710-790HB, and impact value can be accomplished 4.3J/cm ², not only hardness is high, also has good impact property.

Accompanying drawing explanation

Fig. 1 is thermal treatment schematic diagram of the present invention.

embodiment:

A rich chromium cast iron high-abrasive material, take iron as main raw material, and to be equipped with carbon, silicon, manganese, sulphur, phosphorus, chromium, molybdenum, nickel, copper be auxiliary material, and after preparation, melting and casting forms, and it is characterized in that, in liquation, each chemical component weight percentage ratio is specially:

C?3.0%，Si?0.7%，Mn?0.85%，S?0.03%，P?0.035%，Cr?20%，Mo?1.8%，Ni?0.7%，Cu?0.4%，?Fe?72.49%。

Rich chromium cast iron high-abrasive material and a heat treating method, include following operation steps:

After preparing according to above-mentioned each chemical component weight percentage ratio, with melting in intermediate frequency vacuum induction furnace, by fusing after pouring molten steel in sand mold, be incubated cooling rear taking-up foundry goods, then remove dead head postheat treatment, the 650 ℃ of insulations 3 hours of quenching, temperature is raised to 1020 ℃ of insulations 2 hours, temperature drops to 980 ℃ of insulations, and after 8 hours, air cooling is to room temperature, and then after 10 hours, air cooling is to room temperature in tempered 480 ℃ of insulations, and its temperature rise rate is all 50 ℃/h.

Claims (3)

1. a rich chromium cast iron high-abrasive material, take iron as main raw material, and to be equipped with carbon, silicon, manganese, sulphur, phosphorus, chromium, molybdenum, nickel, copper be auxiliary material, after preparation, melting and casting forms, and it is characterized in that, in liquation, each chemical component weight percentage ratio is specially: C 2.9-3.1%, Si 0.5-0.8%, Mn 0.8-1.0%, S 0.02-0.05%, P 0.02-0.05%, Cr 19-21%, Mo 1.7-1.9%, Ni 0.5-0.7%, Cu 0.2-0.5%, surplus is Fe.

2. rich chromium cast iron high-abrasive material according to claim 1, is characterized in that, each chemical component weight percentage ratio is specially: C 3.0%, and Si 0.7%, Mn 0.85%, and S 0.03%, and P 0.035%, and Cr 20%, Mo 1.8%, and Ni 0.7%, and Cu 0.4%, and Fe 72.49%.

3. a heat treating method for rich chromium cast iron high-abrasive material, is characterized in that, includes following operation steps:

After preparing according to above-mentioned each chemical component weight percentage ratio, with melting in intermediate frequency vacuum induction furnace, by fusing after pouring molten steel in sand mold, be incubated cooling rear taking-up foundry goods, then remove dead head postheat treatment, the 650 ℃ of insulations 3 hours of quenching, temperature is raised to 1020 ℃ of insulations 2 hours, temperature drops to 980 ℃ of insulations, and after 8 hours, air cooling is to room temperature, and then after 10 hours, air cooling is to room temperature in tempered 480 ℃ of insulations, and its temperature rise rate is all 50 ℃/h.