Wear-resisting cast steel

A wear-resistant, cast steel technology, applied in the field of wear-resistant cast steel, can solve the problems of high production cost of castings, high molybdenum content, easy fracture production cost, etc.

Inactive Publication Date: 2014-04-16
湖南华民控股集团股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the main disadvantages of this wear-resistant cast steel are: the castings are prone to cracks after water quenching;
[0003] In order to solve the above deficiencies, the existing technology hopes to add precious metal elements such as Mo and Ni to the material or greatly increase the content of alloy elements through alloying to enhanc

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] According to chemical composition: C, 0.35wt%; Mn, 2.0wt%; Cr, 1.0wt%; Si, 0.8wt%; Mo, 0.05wt%; Iron, ferrosilicon, ferrochromium and ferromolybdenum.

[0037] Put steel scrap and ferromolybdenum in an electric furnace for smelting. When it is partially melted, add ferrochrome and fully melt it. Put in ferromanganese and ferrosilicon 5 minutes before the molten steel comes out of the furnace, and then put in a deoxidizer to purify the molten steel. After the molten steel reaches 1500°C Out of the furnace, casting 60-70mm thick castings, heat treatment: heating to 930 ℃ ~ 960 ℃, heat preservation for 2 hours, then water quenching, cooling to room temperature and placing in a tempering furnace, tempering 180 ℃ ~ 220 ℃, heat preservation 3 hours, out of the furnace and air cooling, to obtain Wear-resistant cast steel.

[0038] The properties of the wear-resistant cast steel obtained in Example 1 are tested, and the hardness obtained is HRC45~50, and the impact toughness a...

Embodiment 2

[0040] According to chemical composition: C, 0.4wt%; Mn, 2.2wt%; Cr, 1.2wt%; Si, 1.0wt%; Mo, 0.03wt%; Iron, ferrosilicon, ferrochromium and ferromolybdenum.

[0041] Put steel scrap and ferromolybdenum in an electric furnace for smelting. When the part is melted, add ferrochrome and fully melt it. Put in ferromanganese and ferrosilicon 5 minutes before the molten steel comes out of the furnace, and then put in deoxidizer to purify the molten steel. The molten steel reaches 1500°C before being released from the furnace , pouring 80-90mm thick castings, heat treatment: heating to 930 ℃ ~ 960 ℃, heat preservation for 3 hours, then water quenching, cooling to room temperature and placing in a tempering furnace, tempering 180 ℃ ~ 220 ℃, heat preservation for 4 hours, out of the furnace and air cooling, to obtain Grinding cast steel.

[0042] The properties of the wear-resistant cast steel obtained in Example 2 are tested, and the hardness obtained is HRC48~52, and the impact tough...

Embodiment 3

[0044] According to chemical composition: C, 0.35wt%; Mn, 2.0wt%; Cr, 1.0wt%; Si, 0.8wt%; Mo, 0.03wt%; Iron, ferrosilicon, ferrochromium and ferromolybdenum.

[0045] Put steel scrap and ferromolybdenum in an electric furnace for smelting. When the part is melted, add ferrochrome and fully melt it. Put in ferromanganese and ferrosilicon 5 minutes before the molten steel comes out of the furnace, and then put in deoxidizer to purify the molten steel. The molten steel reaches 1500°C before being released from the furnace , pouring 50-60mm thick castings, heat treatment: heating to 930 ℃ ~ 960 ℃, keeping warm for 2 hours, then quenching in water, cooling to room temperature and placing in a tempering furnace, tempering 180 ℃ ~ 220 ℃, holding for 3 hours, taking out the furnace and air cooling, to obtain Grinding cast steel.

[0046] The properties of the wear-resistant cast steel obtained in Example 3 are tested, and the hardness obtained is HRC45~50, and the impact toughness a ...

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Abstract

The invention provides wear-resisting cast steel. The cast steel comprises the following chemical components by weight percent: 0.3-0.4% of C, 1.8-2.2% of Mn, 0.8-1.2% of Cr, 0.6-1.0% of Si, 0.02-0.05% of Mo, 0-1.0% of Ni, 0-1.0% of V, 0-1.0% of Ti, 0-1.0% of Re, less than or equal to 0.04% of P, less than or equal to 0.04% of S, and the balance of Fe. Compared with the existing wear-resisting cast steel, the wear-resisting cast steel has the advantages that the content of manganese is improved and the content of molybdenum is lowered, thus the cost is lowered under the premise of guaranteeing the hardenability of the cast steel; the content of manganese is improved but the content of silicon is lowered, so that the wear-resisting cast steel is improved in thermal conductivity so as to avoid generating cracks in water quenching; furthermore, by regulating the content of carbon, manganese, chrome, silicon and molybdenum, the wear-resisting cast steel is improved in impact toughness and hardness, is not easy to break and has excellent wear-resisting property.

Description

technical field [0001] The invention belongs to the technical field of wear-resistant cast steel, and in particular relates to a wear-resistant cast steel and a production method thereof. Background technique [0002] The current wear-resistant cast steel for the production of ball mill liners and jaw crusher jaws usually uses low-carbon chromium-molybdenum-silicon-manganese cast steel, and its main chemical composition (wt%) is: C, 0.25-0.35; Mn, 0.6-1.5; Cr, 0.5-2.0; Si, 0.5-1.5; Mo, 0.2-0.5 and Fe. However, the main disadvantages of the wear-resistant cast steel are: the castings are prone to cracks after water quenching; the castings are prone to breakage during use; [0003] In order to solve the above deficiencies, the existing technology hopes to add precious metal elements such as Mo and Ni to the material or greatly increase the content of alloy elements through alloying to enhance the hardenability of wear-resistant cast steel, thereby improving the wear resistanc...

Claims

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Application Information

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IPC IPC(8): C22C38/58
Inventor 任立军
Owner 湖南华民控股集团股份有限公司
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