Plasma Spray Welding Composite Roll and Manufacturing Method of Composite Roll Ring

Abstract

Disclosed are a plasma spray welding composite roll, a composite roll collar and a manufacturing method thereof. Roll collar material is spray-welded on a central basic shaft (ring) with the method of plasma spray welding, and then good metallurgical bonding is achieved. The composite roll and the composite roll collar manufactured with the method are excellent in performance of working linings, the utilizing rate of the material is high, and as the basic shaft (ring) can be repeatedly used, product cost is low.

Description

technical field

[0001] The invention belongs to the technical field of steel rolling in the iron and steel industry, and particularly relates to a method for manufacturing a plasma spray-welded composite roll and a composite roll ring. Background technique

[0002] The iron and steel industry is an important basic industry of the national economy and an important symbol of the national economic level and comprehensive national strength. Steel rolling production is the final product production process in the entire steel production, and the rolls in the rolling mill are the main key tools for steel rolling. It determines the precision, quality, variety and cost of steel products, and is the most important consumption tool and main consumption cost in steel rolling production. In 2011, my country's roll consumption has reached more than 700,000 tons, and there are nearly 300 roll manufacturers. However, it still cannot meet the high-end product requirements of my country's s...

Examples

Embodiment 1

[0034] Example 1: see figure 1 , a plasma spray welded composite roll, comprising a roll base shaft and an alloy working layer, characterized in that: the roll base shaft is a revolving body, the alloy working layer covers the outer surface of the revolving body, and the alloy The working layer is a plasma spray welding composite layer. The base shaft of the roll is a cylinder, and its material is a common alloy steel.

Embodiment 2

[0035] Example 2: see figure 2 , a plasma spray welding composite roll ring, comprising a base ring of the roll ring and an alloy working layer, characterized in that: the base ring is a revolving body, the alloy working layer covers the outer surface of the revolving body, and the The alloy working layer is a plasma spray welding composite layer. The base ring is an annular body, and its material is commonly used alloy steel.

Embodiment 3

[0036] Example 3: see image 3 , a manufacturing method of a plasma spray-welded composite roll and a composite roll ring, which specifically includes the following steps:

[0037] a: The base shaft or base ring of the roll is machined by machine tools, and the outer surface of the base shaft or base ring is machined to remove surface impurities and dimensions and ensure smoothness;

[0038] b: formulating alloy powder composition for spray welding,

[0039] c: Preheat the base shaft or base ring to 400-450℃ in the heating furnace, and then install it on the rotatable machine tool fixture;

[0040] d: put the alloy powder composition dried in step b into the material box of the plasma spray welding machine; adjust the appropriate process parameters, adjust the nozzle to be about 10mm away from the surface of the base shaft or base ring, and start the spray welding machine to spray and weld to form an alloy Working layer; and keep the base shaft or base ring temperature 280-3...

technical field

[0001] The invention belongs to the technical field of steel rolling in the iron and steel industry, and particularly relates to a method for manufacturing a plasma spray-welded composite roll and a composite roll ring. Background technique

[0002] The iron and steel industry is an important basic industry of the national economy and an important symbol of the national economic level and comprehensive national strength. Steel rolling production is the final product production process in the entire steel production, and the rolls in the rolling mill are the main key tools for steel rolling. It determines the precision, quality, variety and cost of steel products, and is the most important consumption tool and main consumption cost in steel rolling production. In 2011, my country's roll consumption has reached more than 700,000 tons, and there are nearly 300 roll manufacturers. However, it still cannot meet the high-end product requirements of my country's s...

Examples

Embodiment 1

[0034] Example 1: see figure 1 , a plasma spray welded composite roll, comprising a roll base shaft and an alloy working layer, characterized in that: the roll base shaft is a revolving body, the alloy working layer covers the outer surface of the revolving body, and the alloy The working layer is a plasma spray welding composite layer. The base shaft of the roll is a cylinder, and its material is a common alloy steel.

Embodiment 2

[0035] Example 2: see figure 2 , a plasma spray welding composite roll ring, comprising a base ring of the roll ring and an alloy working layer, characterized in that: the base ring is a revolving body, the alloy working layer covers the outer surface of the revolving body, and the The alloy working layer is a plasma spray welding composite layer. The base ring is an annular body, and its material is commonly used alloy steel.

Embodiment 3

[0036] Example 3: see image 3 , a manufacturing method of a plasma spray-welded composite roll and a composite roll ring, which specifically includes the following steps:

[0037] a: The base shaft or base ring of the roll is machined by machine tools, and the outer surface of the base shaft or base ring is machined to remove surface impurities and dimensions and ensure smoothness;

[0038] b: formulating alloy powder composition for spray welding,

[0039] c: Preheat the base shaft or base ring to 400-450℃ in the heating furnace, and then install it on the rotatable machine tool fixture;

[0040] d: put the alloy powder composition dried in step b into the material box of the plasma spray welding machine; adjust the appropriate process parameters, adjust the nozzle to be about 10mm away from the surface of the base shaft or base ring, and start the spray welding machine to spray and weld to form an alloy Working layer; and keep the base shaft or base ring temperature 280-3...

Images