Composite overlaying method for bush and sleeve of rolls for hot dipping

A technology of hot-dip plating and bushing, applied in hot-dip plating process, welding medium, welding equipment, etc., can solve the problems of rough wear surface, surface wear of bushes and bushings, short service life, etc., and achieve high wear resistance and durability. The effect of good corrosion resistance, thermal fatigue resistance and low thermal expansion coefficient

Inactive Publication Date: 2011-07-06
PANGANG GROUP VANADIUM TITANIUM & RESOURCES +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, at present, the bearing bushes and sleeves used in sinking rollers and stabilizing rollers are mostly made of iron-based materials, ceramic materials, and surface-sprayed materials. Iron-based materials are not wear-resistant and have a short service life. The wear surface is rough and easy to form deep grooves; ceramic materials It is prone to cracking due to impact during use, and the service life is unstable, while the thickness of the sprayed layer of the surface sprayed material is limited
Therefore, in the process of use, it is easy to cause serious wear on the surface of the bearing bush and bushing for the sinking roll or stabilizing roll, and even the coating peels off and falls off, resulting in abnormal operation of the sinking roll or stabilizing roll, which affects the normal production

Method used

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  • Composite overlaying method for bush and sleeve of rolls for hot dipping
  • Composite overlaying method for bush and sleeve of rolls for hot dipping
  • Composite overlaying method for bush and sleeve of rolls for hot dipping

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] The base substrate 1 of the cylindrical bearing bush and the shaft sleeve is 00cr17Ni14Mo2 stainless steel iron-based material (such as figure 1 shown), its chemical composition is C≤0.03%, Cr16-18%, Ni 10-14%, Mo2.00-3.00%, Mn≤2.00%, Si≤1.00%; The heating method is to preheat to 500°C, keep it warm for 1h, and then slowly cool to 200°C at a rate of 50°C / h; use a cobalt-based alloy electrode, and its composition is: Cr20%, Ni 0.5%, W 10%, Mo 2%, V 0.1%, Ti 0.1%, C 0.5%, Fe 6%, Al 5%, Mn0.3%, Nb 1.5%, Si 0.5%, the rest is Co, and P and S less than 0.05, in the bushing Continuous surfacing welding is carried out on the substrate with surfacing welding equipment. The thickness of each layer of surfacing welding is 2mm, and the required total thickness is 6mm.

[0046] After the first layer of surfacing welding, remove the welding slag on the surfacing welding surface, then preheat the surfacing bearing bush and bushing to 600°C, keep it warm for 2 hours, and slowly cool i...

Embodiment 2

[0051] The base body 1 of the cylindrical bearing bush with flange is made of heat-resistant stainless steel SUS 316 (such as image 3 shown), its chemical composition is C≤0.03%, Cr16-18%, Ni10-14%, Mo2.00-3.00%, Mn≤2.00%, Si≤1.00%; the bearing bush and the bushing matrix are heated by electromagnetic induction Method: Preheat to 650°C, hold for 3 hours, and then slowly cool to 300°C at a rate of 150°C / h; use cobalt-based alloy electrode, the composition of which is: Cr 28%, Ni 5%, W 5%, Mo 6%, V 0.2%, Ti 0.2%, C 1.0%, Fe 12%, Al 0.5%, Mn 0.7%, Nb 1.0%, Si 0.4%, the rest is Co, and P and S less than 0.04, in the bearing bush and the bushing matrix The surfacing machine is used for continuous surfacing welding. The thickness of each layer of surfacing welding is 5mm, and the total thickness is required to be 20mm.

[0052] After the first layer of surfacing welding, remove the welding slag on the surfacing welding surface, then preheat the surfacing bearing bush and bushing t...

Embodiment 3

[0057] The base body 1 of the cylindrical bushing sleeve with the end cover is heat-resistant stainless steel ZG07Cr19Ni9 (such as Figure 4 shown), the chemical composition is C0.07%, Cr18-21%, Ni 8.0-11.0%, Mn1.5%, Si1.5%, P≤0.040%, S≤0.030%; Preheat to 550°C by resistance heating method, keep it warm for 2h, and then slowly cool to 250°C at a rate of 100°C / h; use cobalt-based alloy electrode, its composition is: Cr 35%, Ni 10%, W 1%, Mo 2%, V 0.2%, Ti 0.2%, C 1.0%, Fe 10%, Al0.8%, Mn 0.7%, Nb 1.0%, Si1.0%, the rest is Co, and P and S less than 0.06, in Continuous surfacing welding is carried out on the base of the bearing bush and the shaft sleeve with surfacing welding equipment. The thickness of each layer of surfacing welding is 1mm, and the required total thickness is 3mm.

[0058] After the first layer of surfacing, remove the welding slag on the surfacing surface, then preheat the surfacing bearing bush and bushing to 550°C, keep it warm for 2 hours, and slowly cool ...

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PUM

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Abstract

The invention discloses a composite overlaying method for a bush and a sleeve at both ends of a sink roll and a stabilization roll for hot dipping. A substrate adopts a stainless steel iron-based material, and a cobalt-based alloy material working face is overlaid on the substrate. The method comprises the following steps of: preheating the manufactured substrate of the bush and the sleeve to 500to 650 DEG C, keeping temperature for 1 to 3 hours, and slowly cooling to 250 to 350 DEG C at a speed of 50 to 150 DEG C per hour; overlaying cobalt-based alloy materials on the substrate; heating the overlaid bush and sleeve to 500 to 650 DEG C, keeping temperature for 1 to 3 hours, and slowly cooling to a room temperature at a speed of 10 to 50 DEG C per hour; and finally, roughing and finishing the overlaid bush and sleeve. The bush and the sleeve for the sink roll and the stabilization roll in the invention work under the condition of hot-dipping of aluminum, aluminum zinc, zinc, zinc aluminum, pure aluminum liquid, and the like, have enough bonding strength of the substrate and the working face and good corrosion resistant and wear resistant performance, and improve the service life and reliability of the bush and the sleeve for the sink roll and the stabilization roll.

Description

technical field [0001] The invention relates to the technical field of surfacing welding of alloy materials, in particular to a sinking roll or 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 A bearing bush and a shaft sleeve, and a method for composite surfacing welding of cobalt-based alloy materials on their surfaces. Background technique [0002] Hot-dip galvanized production equipment includes hot-dip galvanized pots, sinking rolls and stabilizing rolls, as well as bearing bushes and bushings installed at both ends, or other supporting components. In the working state, the sinking roller and stabilizing roller, as well as the bearing bushes and bushings installed at both ends, are completely submerged in a hot-dip galvanizing pot filled with zinc-aluminum alloy melt, and hot-dip galvanizing liquid at 600±10°C, Work under the temperature range of 430±10°C hot-...

Claims

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Application Information

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