Anti-agglomeration high-temperature resistant coating of furnace bottom roller

Abstract

The invention provides an anti-agglomeration high-temperature resistant coating of a furnace bottom roller. The coating comprises a substrate, wherein the substrate includes the following components by weight: 35-63 percent of Co, 20-30 percent of Cr, 10-20 percent of Ta, 5-10 percent of Al and 2-5 percent of y. According to the invention, a metal-ceramic material is coated on a furnace bottom roller body in a spraying manner by adopting an explosion method, thus the characteristics of the surface of the furnace bottom roller body is changed, a better prevention of the agglomeration of the furnace bottom roller body is achieved, and further the high-temperature resistance of the furnace bottom roller is enhanced.

Description

technical field

[0001] The invention relates to an anti-nodulation coating, in particular to a cermet coating. Background technique

[0002] Sheet metal such as duplex stainless steel is a high-end metal product. The processing and forming of duplex stainless steel and other materials in the metallurgical industry can generally be divided into two forms: hot forming (hot rolling) and cold forming (cold drawing).

[0003] The production process of hot-rolled duplex stainless steel and other materials is as follows: (1) the duplex stainless steel and other material plate billets are heated to 1100°C through a roller hearth furnace; (2) the slabs are rolled into required specifications by a hot rolling mill (3) Cut out the size required by the customer after edge trimming and shearing; (4) After heat treatment, car leveling, pickling and other processes, the properties of the duplex stainless steel and other materials are adjusted to the customer's requirements before delivery...

Examples

Embodiment 1

[0046] An anti-nodulation and high-temperature-resistant furnace bottom roller coating, which is composed of a primer layer, which includes the following components in mass percentage: Co: 38%, Cr: 30%, Ta: 18%, Al: 10%, y: 4 %.

[0047] The thickness of the coating is 0.12mm; the hardness of the coating is greater than Hv800.

[0048] The final surface roughness of the roller surface coating is Ra7.0. The surface of the roller body is sprayed by explosive spraying process.

Embodiment 2

[0050] An anti-nodulation and high-temperature-resistant furnace bottom roll coating, the coating includes a primer layer, and the primer layer includes the following components in mass percentage: Co: 45%, Cr: 22%, Ta: 20%, Al: 10%, y: 3%.

[0051] A working layer is coated on the primer layer, the basic composition of the working layer is ZrO 2 : 70%, Al 2 o 3 : 30%.

[0052] The total thickness of the coating is greater than 0.15mm, and the hardness of the coating is greater than Hv800.

[0053] The final surface roughness of the roller surface coating is Ra9.0. The surface of the roller body is sprayed by explosive spraying process.

Embodiment 3

[0055] An anti-nodulation and high-temperature-resistant furnace bottom roll coating, the coating includes a primer layer, and the primer layer includes the following components in mass percentage: Co: 50%, Cr: 25%, Ta: 15%, Al: 6%, y: 4%.

[0056] There is also a working layer on the bottom layer, which is composed of ZrO 2 : 75%, Al 2 o 3 : 25%.

[0057] The working layer is coated with a sealing layer consisting of 25-35% CrB-CrO 2 , and the rest are acid conditioners. CrB-CrO 2 The mass proportion of CrB in the medium is 30%, and the rest is CrO 2 . The basic composition of acid conditioning agent is: phosphoric acid 18%, zinc phosphate 12%, sodium phosphate 3%, aluminum dihydrogen phosphate 10%, water 57%.

[0058] The coating thickness is 0.16mm, and the coating hardness is greater than Hv800.

[0059] The final surface roughness of the roller surface coating is Ra7.0-9.0. The surface of the roller body is sprayed by explosive spraying process.

technical field

[0001] The invention relates to an anti-nodulation coating, in particular to a cermet coating. Background technique

[0002] Sheet metal such as duplex stainless steel is a high-end metal product. The processing and forming of duplex stainless steel and other materials in the metallurgical industry can generally be divided into two forms: hot forming (hot rolling) and cold forming (cold drawing).

[0003] The production process of hot-rolled duplex stainless steel and other materials is as follows: (1) the duplex stainless steel and other material plate billets are heated to 1100°C through a roller hearth furnace; (2) the slabs are rolled into required specifications by a hot rolling mill (3) Cut out the size required by the customer after edge trimming and shearing; (4) After heat treatment, car leveling, pickling and other processes, the properties of the duplex stainless steel and other materials are adjusted to the customer's requirements before delivery...

Examples

Embodiment 1

[0046] An anti-nodulation and high-temperature-resistant furnace bottom roller coating, which is composed of a primer layer, which includes the following components in mass percentage: Co: 38%, Cr: 30%, Ta: 18%, Al: 10%, y: 4 %.

[0047] The thickness of the coating is 0.12mm; the hardness of the coating is greater than Hv800.

[0048] The final surface roughness of the roller surface coating is Ra7.0. The surface of the roller body is sprayed by explosive spraying process.

Embodiment 2

[0050] An anti-nodulation and high-temperature-resistant furnace bottom roll coating, the coating includes a primer layer, and the primer layer includes the following components in mass percentage: Co: 45%, Cr: 22%, Ta: 20%, Al: 10%, y: 3%.

[0051] A working layer is coated on the primer layer, the basic composition of the working layer is ZrO 2 : 70%, Al 2 o 3 : 30%.

[0052] The total thickness of the coating is greater than 0.15mm, and the hardness of the coating is greater than Hv800.

[0053] The final surface roughness of the roller surface coating is Ra9.0. The surface of the roller body is sprayed by explosive spraying process.

Embodiment 3

[0055] An anti-nodulation and high-temperature-resistant furnace bottom roll coating, the coating includes a primer layer, and the primer layer includes the following components in mass percentage: Co: 50%, Cr: 25%, Ta: 15%, Al: 6%, y: 4%.

[0056] There is also a working layer on the bottom layer, which is composed of ZrO 2 : 75%, Al 2 o 3 : 25%.

[0057] The working layer is coated with a sealing layer consisting of 25-35% CrB-CrO 2 , and the rest are acid conditioners. CrB-CrO 2 The mass proportion of CrB in the medium is 30%, and the rest is CrO 2 . The basic composition of acid conditioning agent is: phosphoric acid 18%, zinc phosphate 12%, sodium phosphate 3%, aluminum dihydrogen phosphate 10%, water 57%.

[0058] The coating thickness is 0.16mm, and the coating hardness is greater than Hv800.

[0059] The final surface roughness of the roller surface coating is Ra7.0-9.0. The surface of the roller body is sprayed by explosive spraying process.