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Titanium carbide ceramic-enhanced visible arc self-shielded flux-cored wire for high-chromium cast iron

A technology of high-chromium cast iron and flux-cored welding wire, applied in the field of material science and engineering, can solve the problem of easy peeling on the surface, and achieve the effects of not easy peeling, high wear resistance, and convenient use on site

Inactive Publication Date: 2011-11-23
YANSHAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But the surface is prone to peeling

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Get 70kg of high-carbon ferrochromium, 2kg of high-carbon ferromanganese, 3kg of ferrosilicon, 3kg of ferro-vanadium, 3kg of ferromolybdenum, 2kg of titanium carbide, 15kg of graphite, 2kg of aluminum / magnesium powder and low-carbon steel strip. First passivate ferrosilicon, high-carbon ferrochromium and high-carbon ferromanganese, that is, heat the ferrosilicon powder and keep it at 700°C for 1 hour; heat the high-carbon ferrochrome powder and keep it at 550°C for 1 hour; Ferromanganese powder is heated and kept at 300°C for 1 hour. Put the various raw materials of the above-mentioned flux core into the mixer for full mixing, use the flux-cored wire production equipment, the powder filling rate is 37%, and draw the flux-cored wire with the outer diameter of F4 twice through the wire drawing machine. The hardness of the surfacing metal is HRC63.

Embodiment 2

[0019] Take 66kg of high-carbon ferrochromium, 2kg of high-carbon ferromanganese, 2kg of ferrosilicon, 1kg of ferro-vanadium, 3kg of ferromolybdenum, 5kg of titanium carbide, 20kg of graphite, 1kg of aluminum / magnesium powder and low-carbon steel strip. First passivate ferrosilicon, high-carbon ferrochromium and high-carbon ferromanganese, that is, heat the ferrosilicon powder and keep it at 730°C for 1 hour; heat the high-carbon ferrochrome powder and keep it at 570°C for 1 hour; Ferromanganese powder is heated and kept at 320°C for 1 hour. Put the various raw materials of the above-mentioned flux core into the mixer for full mixing, use the flux-cored wire production equipment, the powder filling rate is 40%, and draw the flux-cored wire with the outer diameter of F4 through the wire drawing machine for 4 times. The hardness of the surfacing metal is HRC65.

Embodiment 3

[0021] Take 60kg of high-carbon ferrochromium, 1kg of high-carbon ferromanganese, 1kg of ferrosilicon, 2kg of ferro-vanadium, 2kg of ferromolybdenum, 8kg of titanium carbide, 25kg of graphite, 1kg of aluminum / magnesium powder and low-carbon steel strip. First passivate ferrosilicon, high-carbon ferrochromium and high-carbon ferromanganese, that is, heat the ferrosilicon powder and keep it at 750°C for 1 hour; heat the high-carbon ferrochrome powder and keep it at 600°C for 1 hour; Ferromanganese powder is heated and kept at 350°C for 1 hour. Put the various raw materials of the above-mentioned flux core into the mixing machine to fully mix, adopt the flux-cored wire production equipment, the powder filling rate is 45%, and draw the flux-cored wire with the outer diameter of F4 through the wire drawing machine for 5 times. The hardness of the surfacing metal is HRC67.

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Abstract

The invention discloses a titanium carbide ceramic-enhanced visible arc self-shielded flux-cored wire for high-chromium cast iron, and the flux-cored wire provided by the invention comprises the following chemical components in percentage by weight (wt%): 60 to 70% of high-carbon ferrochrome, 1 to 2% of high-carbon ferromanganese, 1 to 3% of ferrosilicon, 1 to 3% of ferrovanadium, 1 to 3% of ferromolybdenum, 2 to 8% of TiC, 15 to 25% of graphite, and 1 to 2% of aluminum / magnesium powders; and the flux-cored wire has a low-carbon steel strip serving as an outer wrapper. The flux-cored wire is made by use of flux-cored wire production equipment which has a flux powder filling rate of 37%to 45%, and drawn by a wire drawing machine 2 to 5 times until the outside diameter of the flux-cored wire reaches the level F4. The flux-cored wire disclosed by the invention can be applied to overlay-welding under the conditions of no preheating before welding and no heat treatment after welding, and is very convenient in on-site use. By virtue of overlay-welding using the flux-cored wire disclosed by the invention, deposited metals have a high hardness up to HRC63-67 and better wear resistance andare not liable to stripping, and the service lives of large-sized high-chromium cast iron wear-resistant parts are 2 to 4 times those of integrally-machined parts.

Description

technical field [0001] The invention belongs to the field of material science and engineering. Background technique [0002] High chromium cast iron has excellent resistance to low stress abrasive wear and low price, making it widely used in the manufacture of cement grinding rollers, large grinding discs, coal grinding rollers and other wear-resistant parts in the fields of metallurgical machinery, mining machinery and coal machinery. widely used. [0003] Wear-resistant parts such as high-chromium cast iron are scrapped due to excessive surface wear after a period of use. Scrapped high-chromium cast iron parts can be repaired by surfacing welding to restore their shape and size, and reuse them after obtaining better performance; or form composite bimetallic parts with excellent performance and low price through surfacing welding green remanufacturing part. In particular, the rapid development of flux-cored wire automatic welding technology has greatly improved the effic...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K35/30B23K35/40
Inventor 杨庆祥杨育林周野飞齐效文
Owner YANSHAN UNIV
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