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Surface surfacing welding process of crystallizer foot roll and workpiece clamping tool

A technology of surface surfacing and workpiece clamping, applied in welding equipment, manufacturing tools, welding equipment, etc., can solve the problems of low fatigue resistance, large bending deformation of workpiece, long axial dimension, etc., to improve the surface hardness of workpiece and The effect of fatigue resistance and good overall performance

Inactive Publication Date: 2019-08-23
承德新新机械制造有限公司
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  • Abstract
  • Description
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Problems solved by technology

However, when using the existing surfacing process and workpiece clamping equipment to produce the above-mentioned crystallizer foot roll, because the diameter of the foot roll is small and the axial dimension is long, the surfacing operation is carried out from the beginning to the end in a continuous operation mode, and there are workpieces. Large bending deformation, uneven surface hardness, low fatigue strength and other defects

Method used

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  • Surface surfacing welding process of crystallizer foot roll and workpiece clamping tool
  • Surface surfacing welding process of crystallizer foot roll and workpiece clamping tool
  • Surface surfacing welding process of crystallizer foot roll and workpiece clamping tool

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Embodiment Construction

[0034] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0035] see figure 1 , figure 2 , image 3 , the crystallizer foot roll surface surfacing process described in the present invention adopts the submerged arc automatic welding method to implement surfacing operation on the surface of the workpiece 1, the preferred welding current is 250-350A, the welding voltage is 25-32V, and the welding method is single pass For spiral welding, the weld bead overlap is 1 / 2, and the specific operation is as follows:

[0036] a. Pre-welding processing: select the round steel raw material of 42CrMo and diameter D1=100mm, and carry out turning processing to obtain a casing workpiece with an outer diameter of D2=92mm and an inner diameter of d=45mm, and leave a length at both ends of the workpiece 1 Guide groove 1-1 with dimension L=6mm;

[0037] b. Workpiece clamping: clamp both ends of the workpiece 1 on the...

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Abstract

The invention provides a surfacing process for a crystallizer foot roller and a workpiece clamping tool and belongs to the technical field of welding processes. The surfacing process for the crystallizer foot roller is characterized in that the surfacing work is conducted on the surfaces of workpieces by means of an union melt welding method and comprises the following operation steps of a, machining before welding, b, workpiece clamping, c, transition layer segmented surfacing, d, workpiece cooling, e, primary wear-resistant layer surfacing, f, secondary wear-resistant layer surfacing and g, thermal treatment after welding. According to the surface surfacing process for the crystallizer foot roller and the workpiece clamping tool, by improving an existing surfacing process and a workpiece clamping tool, the purposes of reducing bending deformation of the workpieces, improving the surface hardness uniformity of the workpieces and improving the fatigue resistance of the repaired workpieces are achieved.

Description

technical field [0001] The invention relates to a metal surface surfacing process and a tooling fixture, in particular to a continuous casting machine crystallizer foot roller surface surfacing process and workpiece clamping tooling, belonging to the field of welding technology technology. Background technique [0002] The crystallizer is an important part of the billet forming equipment in the continuous casting process. It is called the "heart" of the continuous casting machine equipment. Its function is to forcefully cool the high-temperature molten steel that is continuously injected into the inner cavity through the water-cooled copper wall. Export its heat to make it gradually solidify into a slab with the required cross-sectional shape and shell thickness, and make the slab whose core is still liquid be continuously pulled out from the lower mouth of the crystallizer, so that it can be used in the future Create conditions for complete solidification in the secondary c...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K31/00B23K37/00B23K37/04
Inventor 李丽梅张志国张欣樊伟张学星
Owner 承德新新机械制造有限公司
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