Heat treatment technique for weld crater of alloy small-diameter pipeline
A technology of small-diameter and welded joints, which is applied in the heat treatment process of small-diameter alloy pipe welded joints, can solve the problems of high product cost, high scrap rate, uncoordinated process steps, etc., and achieve the effect of reasonable process arrangement
Inactive Publication Date: 2016-06-15
CHONGQING JIEWEI DIE & MOLD
View PDF0 Cites 2 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
[0002] The existing welding joint heat treatment process of alloy small-diameter pipes has uncoordinated and unreasonable process steps, sometimes repeated or over-treated, which seriously affects product quality, and the scrap rate is high, requiring high operating skills for employees, resulting in High product cost
[0003] In addition, the existing welding joint heat treatment process of alloy small-diameter pipeline has lengthy process steps, and there are many unreasonable places in the allocation of each process.
Method used
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
View moreExamples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0022] The present invention will be further described below in conjunction with embodiment:
[0023] A welding joint heat treatment process of an alloy small-diameter pipeline, comprising the following steps:
[0024] Construction preparation→priming preheating→welding preheating→post-welding treatment→hardness inspection;
[0025] 1) Preheat with oxygen and acetylene flame;
[0026] 1.1) When heating, generally set the oxygen meter to 3-4Mpa, and the acetylene meter to 0.05-0.1Mpa, and adjust it according to needs;
[0027] 1.2) During the heating process, the temperature must be uniform, and the temperature should be measured at any time; the heating time is about 3-5 minutes;
[0028] 1.3) When the temperature rises to the required preheating temperature and the temperature is basically uniform, the welder is notified to start welding;
[0029] 2) Welding, during the welding process, the interlayer temperature should be kept not lower than 250°C and not higher than 400°...
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
Login to View More Abstract
The invention discloses a heat treatment technique for a weld crater of an alloy small-diameter pipeline. The heat treatment technique comprises the following steps of construction preparation, bottoming and preheating, electrowelding preheating, post-weld treatment and hardness detection. The heat treatment technique specifically comprises the steps that (1) oxygen flames and acetylene gas flames are used for preheating; (2) welding is conducted, and the interlayer temperature is supposed to be kept not lower than 250 DEG C and not higher than 400 DEG C in the welding process; and (3) post-weld heat treatment is conducted. According to the heat treatment technique, working procedures are arranged reasonably and harmonically, the rejection rate can be decreased effectively, and the product quality is high.
Description
technical field [0001] The invention relates to a heat treatment process for welding joints of small-diameter alloy pipes. Background technique [0002] The existing welding joint heat treatment process of alloy small-diameter pipes has uncoordinated and unreasonable process steps, sometimes repeated or over-treated, which seriously affects product quality, and the scrap rate is high, requiring high operating skills for employees, resulting in Product cost is high. [0003] In addition, the existing alloy small-diameter pipe welding seam heat treatment process steps are lengthy, and there are many unreasonable places in the allocation of each process. Contents of the invention [0004] In order to realize the purpose of the present invention, the present invention provides a heat treatment process for weld joints of small-diameter alloy pipes with reasonable and coordinated process arrangement. [0005] In order to solve the problems of the technologies described above, ...
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
Login to View More Patent Type & Authority Applications(China)
IPC IPC(8): C21D9/50
Inventor 曾尚怀
Owner CHONGQING JIEWEI DIE & MOLD