Method for forming L80-13Cr martensitic stainless steel seamless steel tube

A martensitic stainless steel, seamless steel pipe technology, applied in the field of seamless steel pipe, new L80~13Cr martensitic stainless steel seamless steel pipe forming field, can solve the problem of low yield, reduce production cost and overcome low yield , the effect of reducing the loss of the riser

Pending Publication Date: 2021-02-05
HANDAN XINXING SPECIAL TUBING CO LTD
View PDF7 Cites 5 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a method for forming L80-13Cr martensitic stainless steel seamless steel pipes, which overcomes the problem of low yield in the process of produ

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 more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Method for forming L80-13Cr martensitic stainless steel seamless steel tube

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0014] The present invention will be described in detail below in conjunction with examples. The protection scope of the present invention is not limited to the embodiments, and any changes made by those skilled in the art within the scope defined in the claims also belong to the protection scope of the present invention.

[0015] The L80~13Cr martensitic stainless steel seamless steel pipe forming method of the present invention, the production specification is the L80~13Cr martensitic stainless steel seamless steel pipe of the specification of φ219mm×30mm×5000mm, and the forming process is as follows:

[0016] Step 1: Prepare a 13Cr continuous casting billet by using electric furnace + refining outside the furnace + vacuum degassing + continuous casting process, and the specification of the continuous casting billet is φ435mm×800mm;

[0017] Step 2: Anneal the continuous casting billet obtained in step 1, the annealing temperature is 820-850°C, keep it warm for 6 hours, and ...

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

No PUM Login to view more

Abstract

The invention relates to a method for forming a L80-13Cr martensitic stainless steel seamless steel tube. The process comprises the steps that 1, a 13Cr continuous casting billet is adopted; 2, the continuous casting billet is annealed; 3, the outer circle of the continuous casting billet is subjected to unilateral machining, and an outer surface oxide skin and a center loose layer are removed; 4,the treated continuous casting billet is uniformly heated to 1100 DEG C-1150 DEG C, and hot broaching is conducted; 5, hot extrusion is conducted on the continuous casting billet obtained after hot broaching; and 6, the hot-extruded steel tube is subjected to heat treatment to obtain the finished stainless steel seamless steel tube. According to the method, the continuous casting billet and hot extrusion forming process is combined, the problem that an existing production process is long in process flow and low in yield is solved, riser losses are reduced, the forging process is omitted, theyield of the martensitic stainless steel seamless steel tube can be increased, and the production cost is reduced.

Description

technical field [0001] The invention belongs to the technical field of mechanical processing and production, and relates to a seamless steel pipe, in particular to a method for forming a novel L80-13Cr martensitic stainless steel seamless steel pipe. Background technique [0002] Due to the harsh conditions of use of pipes in the oil industry, ordinary carbon steel pipes cannot meet the requirements. According to literature reports, oil well shutdowns and scrapping accidents emerge in endlessly every year due to pipe corrosion, resulting in huge economic losses. Pipes such as dual-phase steel and nickel-based alloys have excellent performance, but are expensive, while 13Cr seamless steel pipes have excellent mechanical properties and corrosion resistance after quenching and tempering, and are economical. They are widely used in petrochemical, mechanical equipment, Mold manufacturing, aerospace military industry and other industries have good development prospects. 13Cr has...

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
no application Login to view more
IPC IPC(8): B21C23/08B21C23/32B21C29/00B21D37/16C21D8/10C22C38/02C22C38/04C22C38/42
CPCB21C23/085B21C29/003B21C23/32B21D37/16C21D8/105C22C38/02C22C38/04C22C38/42C21D2211/008
Inventor 王锦永高杰张亚斌王连华刘富强孙元宁庞于思高正磊曹洪波
Owner HANDAN XINXING SPECIAL TUBING CO LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap