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Renovation technology for ladle

A repair method and ladle technology, applied to furnace types, arc welding equipment, heat treatment process control, etc., to achieve the effect of reducing the cost of use, improving the utilization rate and service life

Active Publication Date: 2011-08-31
上海宝冶工程技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a repair method for large-scale damage of inclusions, which solves the problem of large inclusions that people have been eager to solve but have not solved. The repair of the ladle body after the scope is damaged prolongs the service life of the ladle and reduces the production cost

Method used

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  • Renovation technology for ladle
  • Renovation technology for ladle
  • Renovation technology for ladle

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0071] 1) Stress generated by mechanical load, this part of the stress is generated by the ladle's own weight, molten steel weight, etc.;

[0072] 2) Temperature difference stress, this part of the stress is caused by the temperature difference between the inner and outer walls of the ladle;

[0073] 3) Stress caused by thermal expansion. This part of the stress is due to the difference in linear expansion coefficient between refractory materials and carbon steel, which forms the expansion stress of refractory bricks on the steel shell.

[0074] According to the analysis of the size measurement results of the ladle’s convex hull deformation on site, the ladle’s convex hull is mainly concentrated under the trunnions on both sides of the ladle, specifically in the middle of the two longitudinal joints. Radial energy control technology and welding deformation control technology, far-infrared automatic pre-weld preheating and post-weld heat treatment technology, and the method of ...

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Abstract

The present invention discloses a ladle repairing method, which comprises a verification of repairing conditions, a rehabilitation of a ladle body and an inspection after the restoration. The rehabilitation steps of the ladle body are as follows: manufacture and preparation for a replacing-mending steel plate; defect detection of all regions of the ladle body before replacing and mending; cutting of the replacing-mending steel plate; processing of a groove; solid welding of group opposite points; welding and heat treatment after welding. The method solves the way-out problem of the ladle after being large-scaly injured, thus enhancing the utilization and service-life of the ladle and effectively reducing the using cost of the ladle.

Description

technical field [0001] The invention relates to a repair technology for damaged steel (iron) water inclusions. Background technique [0002] Steel (iron) water ladle is a high-temperature container equipment used by smelting and foundry enterprises to hold steel (iron) water. It is used as a container for high-temperature liquid metal. Through observation and field investigation, it is found that after a period of use of VOD stainless steel ladles, many ladles The diameter of the lower half becomes larger and seriously deformed, especially the deformation of the filling body is the most serious directly under the load-bearing trunnion reinforcement plate, resulting in the thinning of the ladle body and changing the force and stress field distribution of the ladle structure; as the ladle is used As the cycle and frequency of use increase, this deformation tendency will become larger and larger, and it is found that almost all stainless steel ladles have this deformation tend...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C21D7/00B23K9/235C21D9/50B23P6/00B23K9/095B23K9/02C21D11/00
Inventor 包朝亮曲金光张立华朱虹王秋蓉卢静魏正黑周阳
Owner 上海宝冶工程技术有限公司