Submerged-arc surfacing flux-cored wire and technology for composite production and reproduction of continuous casting rollers

A technology of submerged arc surfacing and flux-cored welding wire, which is applied to manufacturing tools, arc welding equipment, welding media, etc., can solve the problems of damage to the service life of continuous casting rolls, low production efficiency, and difficult operation of the welding process. To achieve the effect of benefiting the uniformity of weld structure and performance, reducing surfacing time, and reducing heat affected zone

A technology of submerged arc surfacing and flux-cored welding wire, which is applied to manufacturing tools, arc welding equipment, welding media, etc., can solve the problems of damage to the service life of continuous casting rolls, low production efficiency, and difficult operation of the welding process. To achieve the effect of benefiting the uniformity of weld structure and performance, reducing surfacing time, and reducing heat affected zone

CN109014654AActive Publication Date: 2018-12-18CENT RES INST OF BUILDING & CONSTR CO LTD MCC GRP
10 Cites 8 Cited by

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Submerged-arc surfacing flux-cored wire and technology for composite production and reproduction of continuous casting rollers
  • Submerged-arc surfacing flux-cored wire and technology for composite production and reproduction of continuous casting rollers
  • Submerged-arc surfacing flux-cored wire and technology for composite production and reproduction of continuous casting rollers

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0061] Embodiment 1 (single-layer submerged arc oscillating surfacing welding composite (re)manufacturing roll)

[0062] Select the submerged arc welding wire of Example 1 in Table 1, and take surfacing composite (re)manufacturing Φ180mm continuous casting base metal as an example, the drawing stipulates that the thickness of one side is 5mm, and the alloy composition meets the requirements of VAI (TSC 4-TSNo. 02 / 94) regulations.

[0063] The surfacing composite (re)manufacturing process adopted is:

[0064] 1.1 Process the old roll blank to Φ170mm, and make corresponding inspections. If there are defects such as cracks in some parts, continue turning. For local defects, low-alloy welding consumables with similar mechanical properties to the base metal should be used for repair welding;

[0065] 1.2 Before welding, the roll blank is not preheated;

[0066] 1.3 Parameter requirements of surfacing welding specification (reference):

[0067] Take welding wire Φ3.2mm as an exam...

Embodiment 2

[0085] Example 2 Single-layer Submerged Arc Helical Surfacing Composite Manufacturing Roll

[0086] Select the submerged arc welding wire of Example 2 in Table 1, take surfacing composite manufacturing Φ230mm continuous casting, the base metal is 42CrMo as an example, the drawing stipulates that the thickness of one side is 5mm, and the alloy composition meets the requirements of VAI (TSC 4-TSNo.02 / 94) Regulations.

[0087] The surfacing composite manufacturing process is:

[0088] 2.1 Process the new roll blank to Φ218mm, and do the corresponding inspection.

[0089] 2.2 Before welding, the roll blank is preheated in the electric furnace, and the preheating temperature is required to be 120°C, and the preheating heating rate is <100°C / hr;

[0090] 2.3 Parameter requirements of surfacing welding specification (reference):

[0091] Take welding wire Φ4.0mm as an example to illustrate the process:

[0092] One layer of surfacing welding, the thickness of surfacing welding o...

Embodiment 3

[0107] Example 3 Composite (re)manufacturing of rolls by single-layer submerged arc oscillating surfacing welding

[0108] Select the submerged arc welding wire of Example 3 in Table 1, and take 21CrMoV511 as an example for surfacing composite (re)manufacturing Φ120mm continuous casting base metal. The drawing stipulates that the thickness of one side is 4mm, and the alloy composition meets VAI (TSC 4-TSNo.02 / 93) regulations.

[0109] The surfacing composite (re)manufacturing process is:

[0110] 3.1 The old roll blank is processed to Φ112mm, and the corresponding inspection is carried out. If there are local defects such as cracks, continue turning. For local defects, low-alloy welding consumables with similar mechanical properties to the base metal should be used for repair welding;

[0111] 3.2 Before welding, the roll billet is preheated in the electric furnace, and the preheating temperature is required to be 180°C, and the preheating temperature rise rate is less than ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
diameteraaaaaaaaaa
elongationaaaaaaaaaa
hardnessaaaaaaaaaa
Login to View More

Abstract

The invention discloses a submerged-arc surfacing flux-cored wire and a technology for composite production and reproduction of continuous casting rollers. The deposited metals of the flux-cored wirecomprises components in percentage by weight as follows: 0.02%-0.3% of C, 0.8%-2.8% of Mn, 0.1%-1.0% of Si, 12.0%-15.0% of Cr, 0.3%-2.0% of Mo, 1.5%-5.0% of Ni, 0.01%-1.5% of rare-earth elements, 0-1.2% of V and Nb, 0-0.16% of N, less than 0.03% of S, less than 0.03% of P and the balance of Fe. The technology comprises steps as follows: (1) rollers are turned into the size before surfacing; (2) the rollers are detected before surfacing; (3) the surfacing technology is determined, and technological parameters are determined according to the surfacing technology; (4) single-layer surfacing forming is performed; (5) components, hardness and structures of different positions after surfacing are detected. The technology is good in technological property and has the high cost performance.

Description

technical field [0001] The invention relates to a submerged-arc surfacing flux-cored welding wire for composite (re)manufacturing continuous casting rolls and a technique, belonging to the field of welding technology. Background technique [0002] Continuous casting equipment has been widely used in major steel mills in my country. Continuous casting rolls are the main consumption parts in continuous casting equipment. Continuous casting rolls include three parts: crystallization section, sector section and horizontal section. Due to the dual role of cooling water, the working conditions are very harsh. Under the action of mechanical and thermal loads, the continuous casting rolls will have different degrees of network cracks, oxidation corrosion, wear damage and other damages on the roll surface during use, which will affect the continuous casting machine. Operating rate, product output and quality, unit roll consumption and rolled material cost. [0003] Surfacing welding c...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
18 Dec 2018
Publication
CN109014654A
IPC
B23K35/30; B23K9/18; B23K9/04
CPC
B23K9/04; B23K9/048; B23K9/18; B23K35/30; B23K35/3086
Inventors
王清宝; 白波