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Stainless steel furnace cover crack repairing method

A repair method, stainless steel technology, applied in the field of metallurgical equipment maintenance, can solve problems such as difficulty, easy cracks at the weld and near the seam, and affect the maintenance time, so as to optimize the welding process, shorten the maintenance time, and ensure the quality of the maintenance Effect

Inactive Publication Date: 2019-10-18
PANGANG GROUP TITANIUM INDAL
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  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

The high-temperature contact surface of the furnace cover can reach about 1200°C during operation. Due to the long-term exposure to high temperature of the structural welds, after a certain period of time, cracks are prone to appear at the welds and near the seams, resulting in water leakage, which seriously affects the performance of the titanium slag smelting furnace. normal smelting
[0003] Due to the particularity of the material of the furnace cover and the conditions of use, it is difficult to perform welding repairs. Even during the repair welding process, cracks will appear repeatedly in the weld seam and near the seam area, which seriously affects the maintenance time and increases the work of welding personnel. Labor intensity

Method used

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Embodiment Construction

[0016] The stainless steel furnace cover crack repair method comprises the following steps: A, pre-welding preparation: (a), first use the drill bit to drill the crack stop hole at the end of the crack, so as to prevent the crack from continuing to extend and expand; (b), select a grinder to remove the crack defect, And the crack is ground into a U-shaped groove shape, and then after the coloring inspection is free of defects, the oil and rust on both sides of the U-shaped groove are cleaned up; (c), before welding, the welding rod is dried; B, Welding: When welding, choose DC welding power supply. Among them, multi-layer welding is adopted. After each section of welding is completed, hammer with a small hammer with a round head immediately. Until it is full of pockmarks, eliminate part of the stress and change the tensile stress to compressive stress, check the surface after hammering, and continue welding after confirming that there are no defects; C. Inspection and surface t...

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Abstract

The invention relates to the field of a metallurgical equipment maintaining method, in particular to a stainless steel furnace cover crack repairing method capable of rapidly realizing stainless steelfurnace cover crack repairing. The stainless steel furnace cover crack repairing method comprises the following steps: A, performing preparation before welding: (a) drilling the tail end of the crackby a drill bit to form a crack stopping hole, (b) selecting a grinding machine to eliminate crack defects, and (c) drying welding rods; B, welding; C, performing checkout and surface treatment: (a) examining air hole, slag inclusion and undercutting defects on the surface of a weld joint after cooling a welding joint to room temperature, and (b) polishing the surface residual height of the weld joint by an angular grinding machine to be in level with the surface of the original weld joint and perform transition smoothness with the edge fusing position; and D, after the above checkout and surface treatment are qualified, completing crack repairing. By the stainless steel furnace cover crack repairing method, the repairing quality is guaranteed, the furnace cover repairing and maintaining time can be shortened to 2 to 3 hours, the furnace stopping time can be effectively shortened, powerful guarantee is provided for recovering normal operation as soon as possible, and the stainless steel furnace cover crack repairing method is particularly suitable for a stainless steel furnace cover crack repairing process.

Description

technical field [0001] The invention relates to the field of metallurgical equipment maintenance methods, in particular to a method for repairing cracks in a stainless steel furnace cover. Background technique [0002] The existing smelting furnace cover is made of stainless steel plates as a whole, and circulating cooling water circulates inside the furnace cover. The high-temperature contact surface of the furnace cover can reach about 1200°C during operation. Due to the long-term exposure to high temperature of the structural welds, after a certain period of time, cracks are prone to appear at the welds and near the seams, resulting in water leakage, which seriously affects the performance of the titanium slag smelting furnace. Normal smelting. [0003] Due to the particularity of the material of the furnace cover and the conditions of use, it is difficult to perform welding repairs. Even during the repair welding process, cracks will appear repeatedly in the weld seam a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23P15/00B23P6/00
CPCB23P6/00B23P15/00
Inventor 李东易攀马勇王丽萍
Owner PANGANG GROUP TITANIUM INDAL
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