Composite resurfacing welding method for sink roller and stabilizing roller used for hot dipping

A sinking roll and stabilizing roll technology, applied in hot-dip plating process, welding medium, welding equipment, etc., can solve problems such as coating peeling and falling off, spray coating failure, surface groove marks, etc., to achieve corrosion resistance and wear resistance Improved damage performance, good thermal fatigue resistance, and improved bonding strength

Inactive Publication Date: 2009-12-09
PANGANG GROUP VANADIUM TITANIUM & RESOURCES +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the hot coating method is simple and practical, Co-WC or MoB / CoCr-WC is generally sprayed on the roller surface as a corrosion-resistant and wear-resistant layer. Due to the material and spraying process, the corrosion-resistant and wear-resistant layer has cracks, no Defects such as denseness, coupled with strong penetration ability of the plating solution, can easily penetrate the sprayed coating and corrode the roller surface, causing the sprayed coating to fail, and the defects of the sprayed coating are also prone to sticking
However, in the process of use, due to sticky slag and other reasons, it is easy to cause quality defects in the produced products, such as surface grooves, uneven spangles, etc.
Because the bonding strength between the coating and the stainless steel material of the roll body is not high enough, the heat and corrosion resistance of the coating material is not high enough, so it is easy to cause the peeling and falling off of the surface coating of the sinking roll or the stabilizing roll, and the surface corrosion is serious, resulting in the failure of the final product. The quality of the product is defective or unqualified, resulting in unstable product quality, short service life and frequent replacement of sinking rollers and stabilizing rollers after each repair

Method used

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  • Composite resurfacing welding method for sink roller and stabilizing roller used for hot dipping
  • Composite resurfacing welding method for sink roller and stabilizing roller used for hot dipping
  • Composite resurfacing welding method for sink roller and stabilizing roller used for hot dipping

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Example 1 The roller base 1 of the sinking roll was obtained by conventional centrifugal casting method, which was made of 00cr17Ni14Mo2 stainless steel iron-based material, a sinking roll base with a diameter of Φ610mm, a length of 1860mm, and a wall thickness of 50mm. The roller base 1 is preheated to 500°C by electric heating method, kept for 1h, and then slowly cooled to 250°C at a rate of 50°C / h, and a cobalt-based alloy electrode is used, the composition of which is: 25% Cr, 5% Ni, 0.1% V, 0.1% Ti, 0.8% C, 6% Fe, 5% Al, 0.3% Mn, 1.5% Nb, 0.5% Si, 0.01% RE, and the rest is Co And P and S less than 0.05, continuous surfacing welding is carried out on the base of the sinking roller with surfacing equipment, and the thickness of each layer of surfacing welding is 5mm. After the first layer of surfacing, remove the welding slag on the surface of the surfacing, and then preheat the body of the sinking roller after surfacing to 500°C, keep it warm for 1 hour, and slowly ...

Embodiment 2

[0042] Example 2 adopts a rolled stabilizer roll base 1 with a diameter of Φ200mm and a length of 1860mm, and the base is SUS316 austenitic heat-resistant stainless steel. Preheat the roller base to 650°C by means of resistance heating, keep it warm for 3 hours, and then slowly cool it to 300°C at a rate of 150°C / h, using a cobalt-based alloy electrode, the composition of which is: 20% Cr, 3% Ni, 0.2% V, 0.2% Ti, 0.5% C, 12% Fe, 0.5% Al, 0.7% Mn, 1.0% Nb, 0.4% Si, 0.02% RE, the rest is Co As well as P and S less than 0.04, the surfacing machine is used to carry out interval surfacing welding on the base of the stabilizer roll body, and the thickness of each layer of surfacing welding is 10mm. After the first layer of surfacing welding, remove the welding slag on the surface of the surfacing welding, and then preheat the stabilizer roll body after surfacing to 600°C, keep it warm for 2 hours, and slowly cool it to 300°C at a rate of 30°C / h to eliminate The stress generated dur...

Embodiment 3

[0047] Example 3 A sinking roller substrate with a diameter of Φ610mm, a length of 1860mm, and a wall thickness of 50mm is used. The substrate is ZG07Cr19Ni9 heat-resistant stainless steel. The roller substrate is preheated to 600°C by gas and electromagnetic induction heating methods and kept for 2 hours. , and then slowly cooled to 350°C at a rate of 100°C / h, using a cobalt-based alloy electrode whose composition is: 26% Cr, 3% Ni, 1.0% V, 1.0% Ti, 1.5% C, 15% of Fe, 1.0% of Al, 1.0% of Mn, 2.0% of Nb, 1.0% of Si, 0.03% RE, the rest is Co and less than 0.04 of P and S, on the base of the sinking roller, use surfacing welding The machine carries out continuous surfacing welding, and the thickness of each layer of surfacing welding is 3mm. After the first layer of surfacing welding, remove the welding slag on the surface of the surfacing welding, and then preheat the stabilizer roller body after surfacing welding to 600 ° C, keep warm 2h, slowly cooling to 300°C at a rate of 3...

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Abstract

The invention discloses a composite resurfacing welding method for a sink roller and a stabilizing roller used for hot dipping. Substrates of the sink roller and the stabilizing roller are made of a stainless steel iron-based material, and the substrates are provided with cobalt-base alloy working surfaces in a resurfacing welding mode. The method comprises the following steps: preheating the manufactured substrate of the sink roller or the stabilizing roller to 500 to 650 DEG C, and keeping the temperature for 1 to 3 hours; slowly cooling the temperature of the substrate to 250 to 350 DEG C at a speed of 50 to 150 DEG per hour, and forming a cobalt-base alloy material on the substrate in a resurfacing welding mode; performing heat treatment on the substrate to eliminate the stress; and finally performing rough machining, finish machining, balancing test and detection on the sink roller or the stabilizing roller. The sink roller and the stabilizing roller work under the conditions of hot-dip aluminium, aluminium-zinc, zinc-aluminium, zinc, pure aluminium liquid and the like, and have enough performances of resistance to heat, corrosion and wear; the substrates of the sink roller and the stabilizing roller and the working surfaces have high bonding strength; and the service life of the sink roller and the stabilizing roller is improved greatly, and is 2 to 3 times that of the prior product.

Description

technical field [0001] The invention relates to the technical field of surfacing welding of alloy materials, in particular to a sinking roll or a stabilizing roll used in hot-dip galvanized pots, aluminum-zinc pots, hot-dip galvanized pots, hot-dip galvanized aluminum pots, and hot-dip pure aluminum pots body, a method of composite surfacing welding cobalt-based alloy materials on its surface. Background technique [0002] Hot-dip galvanizing production equipment includes hot-dip galvanizing pots, sinking rolls and stabilizing rolls, and other supporting components. In the working state, the sinking roll and the stabilizing roll are submerged in a hot-dip galvanized pot filled with zinc-aluminum alloy melt, and work at a temperature range of 450-550°C. [0003] Since the sinking roll or stabilizing roll has been submerged in the high-temperature zinc-aluminum alloy melt, it not only suffers from the corrosion and wear of the zinc-aluminum alloy melt, but also has quality de...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K9/04B23K9/235B23K35/30B23K9/095C23C2/00
Inventor 贺同正武广波
Owner PANGANG GROUP VANADIUM TITANIUM & RESOURCES
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