High chromium cast iron containing SiC powder, preparation method thereof and wear resistant casting

A technology for high-chromium cast iron and wear-resistant parts. It is applied in the field of manufacturing wear-resistant castings and high-chromium cast iron. It can solve problems such as peeling off of the surface of castings and wear failure of castings, so as to improve friction and wear performance, resist high-temperature friction and wear, and improve The effect of abrasion resistance

Active Publication Date: 2011-10-19
SHANDONG KAITAI SHOT BLASTING MACHINERY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the use of this high-chromium cast iron has the following disadvantages: when it is subjected to friction and wear, especially in the case of impact friction and wear, the surface of the casting is prone to peeling off layer by layer, resulting in the failure of the casting

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] 1) Take SiC powder with a purity of 99.9%. The average particle size of SiC powder is 40 nanometers. SiC powder accounts for 6% of the total weight of the high-chromium cast iron. -3mm iron filings coverage;

[0031] 2) According to the composition of 3.9%C, 22%Cr, 1.0%Si, 1.6%Mo, 1.2%Mn, 0.4%Ni, 0.09%V, 0.031%S, 0.030%P, and the balance is Fe, the charge ratio is carried out , using a 250 kg medium-frequency induction furnace for melting, and the melting temperature is 1250 °C;

[0032] 3) During the smelting process, slag removal, deoxidation, refining, using graphite recarburizer to increase carbon, glass slag collection and deslagging to obtain refined metal liquid;

[0033] 4) Pour the refined metal liquid into the ladle after standing, and stir for 2 minutes to fully mix the SiC powder and the refined metal liquid, spread plant ash on it, and wait for pouring after standing for 10 minutes;

[0034] 5) Pour the refined molten metal mixed with SiC powder in step 4...

Embodiment 2

[0041] 1) Take SiC powder with a purity of 99.9%. The average particle size of SiC powder is 20 nanometers. SiC powder accounts for 3% of the total weight of high-chromium cast iron. covered by iron filings;

[0042] 2) According to the composition of 3.1%C, 18%Cr, 0.5%Si, 0.6%Mo, 0.6%Mn, 0.1%Ni, 0.04%V, 0.011%S, 0.018%P, and the balance is Fe, the charge ratio is carried out , using a 250 kg medium-frequency induction furnace for melting, and the melting temperature is 1550°C;

[0043] 3) During the smelting process, slag removal, deoxidation, refining, using graphite recarburizer to increase carbon, glass slag collection and deslagging to obtain refined metal liquid;

[0044] 4) Pour the refined metal liquid into the ladle after standing, and stir for 2 minutes to fully mix the SiC powder and the refined metal liquid, spread plant ash on it, and wait for pouring after standing for 10 minutes;

[0045] 5) Pour the refined molten metal mixed with SiC powder in step 4) into t...

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Abstract

The invention discloses a high chromium cast iron containing SiC powder, a preparation method thereof and a wear resistant casting manufacturing method utilizing the same. A technical scheme is that a high chromium cast iron containing SiC powder is characterized in that the SiC powder is 99.9% SiC and with an average granularity of 20-40 nm, and accounts for 3-6% of a gross weight of the high chromium cast iron. The high chromium cast iron also comprises 3.1-3.9% of C, 18-22% of Cr, 0.5-1.0% of Si, 0.6-1.6% of Mo, 0.6-1.2% of Mn, 0.1-0.4% of Ni, 0.04-0.09% of V, 0.011-0.031% of S, and 0.018-0.030% of P. The beneficial effects are that :1) wear resistance of the casting id substantially raised by the SiC powder; 2) the SiC powder is used to enhance the high chromium cast iron material to form a high impact-resistant, friction-resistant, wearing- resistant high chromium cast iron wear-resistant blast blade. Therefore, the SiC nano powder can not only change growth morphology of high chromium cast iron crystal and growthform of a martensite to substantially enhance material hardness, but also improve material friction and wearing performance at a high temperature to obviously play a role of friction and wearing resistance at a high temperature.

Description

technical field [0001] The invention relates to a cast iron material, in particular to a high chromium cast iron containing SiC powder, a preparation method of the cast iron and a method for manufacturing wear-resistant castings with the cast iron material. Background technique [0002] In the prior art, high-chromium cast iron has excellent wear resistance. Therefore, as the upper parts of the shot blasting machine that require high wear resistance, they are all made of high-chromium cast iron. However, this kind of high chromium cast iron has the following disadvantages in use: when it is subjected to friction and wear, especially in the case of impact friction and wear, the casting is prone to peeling off layer by layer, thus causing the casting to wear and tear. Contents of the invention [0003] The purpose of the present invention is to overcome the defects in the prior art, to provide a high chromium cast iron, the preparation method of the cast iron and the method ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C37/10C22C32/00B24C5/06B24C9/00
Inventor 王守仁李计良
Owner SHANDONG KAITAI SHOT BLASTING MACHINERY
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