Manufacturing process of x80 steel grade d1422*30.8 medium frequency induction heating and simmering bent pipe
A technology of induction heating and manufacturing process, applied in the field of manufacturing process of simmering elbows, can solve the problems of reduced strength and seismic performance, unsatisfactory weld toughness, poor hardenability of elbows, etc., and achieves strength and seismic performance. High, good hardenability, uniform metallographic structure
Active Publication Date: 2017-03-01
河北恒通管件集团有限公司
View PDF6 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
[0003] The manufacture of large-diameter elbows faces many technical difficulties, such as weld toughness not meeting the requirements, and with the increase of wall thickness, the hardenability of the elbow is poor, and the bending section of large-diameter pipes is deformed and the wall thickness is thinned during the bending process , Poor uniformity, its strength and anti-seismic performance are reduced, the influence of process parameters on the bending section should be taken into account in the design of the manufacturing process, so that the mechanical properties of the bending section can be guaranteed
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
[0026] The following is a detailed description of the manufacturing process of X80 steel grade D1422*30.8 intermediate frequency induction heating simmering bent pipe in combination with specific implementation methods:
[0027] First, design the composition of the raw material of the pipe, that is, the composition of the steel plate: the raw material of the pipe is made of low-carbon content raw materials to maintain the high toughness of the bend. The composition of the raw materials is designed as: 0.06% C; 0.02% Al; 0.25% Mo; 0.01 % P; 0.35% Si; 2.3% Mn; 0.28% Cr; 0.17% Ni;
[0028] Weld the original pipe material into the bent pipe base material: the welding process adopts straight seam submerged arc welding, and the welding wire is selected as alloy wire with Ti and B elements added to ensure the toughness of the weld;
[0029] In the design of the pipe composition, it is considered that the large-diameter elbow requires high toughness in terms of seismic performance, so...
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
| Property | Measurement | Unit |
|---|---|---|
| diameter | aaaaa | aaaaa |
| thickness | aaaaa | aaaaa |
| tensile strength | aaaaa | aaaaa |
Login to View More
Abstract
The invention relates to a manufacturing process for X80 steel grade D1422*30.8 medium frequency induction heating roasted bent pipes. The manufacturing process includes the following steps that components of pipe raw materials are designed; the pipe raw materials are bent round and welded to form bent pipe base materials; partial quenching treatment is carried out; bent pipe roasting is carried out, and cooling is carried out after roasting; tempering and normalizing treatment are carried out after pipe bending; ultrasonic transverse wave and longitudinal wave examination is carried out on the obtained bent pipes; and the obtained bent pipes are sampled and detected. The bent pipe manufactured through the manufacturing process is large in aperture and high in steel grade, the high tenacity of a weld joint of the bent pipe can be guaranteed, and the hardenability of the bent pipe is good. In addition, the bent section of the bent pipe is large in wall thickness and uniform in crystalline phase structure. The bent pipe has enough strength and anti-seismic performance, thereby meeting the actual requirement of natural gas conveying.
Description
technical field [0001] The invention relates to a manufacturing process of a simmered bent pipe, in particular to a manufacturing process of an X80 steel grade D1422*30.8 intermediate frequency induction heating simmered bent pipe. Background technique [0002] The production areas of oil and natural gas are relatively concentrated, and the energy supply is unbalanced. The effective transportation of oil and natural gas is an effective means to solve the unbalanced energy supply. The use of pipelines to transport oil and natural gas is the main way of energy transmission. At present, ultra-long-distance transportation has been realized. Energy transmission, such as transcontinental and transoceanic submarine pipelines, along with the strategic adjustment of my country's natural gas transmission - West-to-East gas transmission strategy, the requirements for energy transmission pipeline technology are getting higher and higher. In order to increase the transmission capacity, lar...
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 Patents(China)
IPC IPC(8): B21C37/06C22C38/58C21D8/10
Inventor 祭立柱韩木杰
Owner 河北恒通管件集团有限公司