Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Manufacturing method for seamless steel pipe for aerospace

A technology of aerospace and seamless steel pipes, which is applied in the production field of aerospace accessories, can solve the problems of high cost of seamless steel pipes for aerospace, and achieve the effects of facilitating organization of production, facilitating control of dimensional accuracy, and improving flexibility

Active Publication Date: 2017-11-21
CHENGDU ADVANCED METAL MATERIALS IND TECH RES INST CO LTD +1
View PDF9 Cites 8 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The invention provides a method for manufacturing seamless steel pipes for aerospace, aiming to solve the problem of high cost of manufacturing seamless steel pipes for aerospace in existing production methods

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
  • Manufacturing method for seamless steel pipe for aerospace
  • Manufacturing method for seamless steel pipe for aerospace
  • Manufacturing method for seamless steel pipe for aerospace

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0037] Adopting the method of the present invention to produce and manufacture seamless steel pipes for aerospace use requires a manufacturing specification of Ф127*19, and selects a steel material with a steel grade of 30CrMnSiA for manufacture. The weight percentage of each chemical composition in 30CrMnSiA steel is: C 0.28%~0.34%, Si 0.90%~1.20%, Mn 0.80%~1.10%, Cr 0.80%~1.10%, Mo≤0.15%, Ni≤0.30%, W ≤0.20%, V≤0.03%, Ti≤0.03%, P≤0.020%, S≤0.015%, Cu≤0.20%, the balance is iron and impurities.

[0038] The specific manufacturing method is as follows:

[0039] In the billet making step, scrap steel and pig iron are selected as the main raw materials, and other raw materials are obtained according to the above weight percentages, and then the raw materials are sequentially smelted in an electric furnace, refined in a LF furnace, refined in a VD furnace, continuous casting and electroslag remelting to make a billet. It is a Φ350mm ingot shape; finally, the prepared steel billet ...

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

PropertyMeasurementUnit
thicknessaaaaaaaaaa
thicknessaaaaaaaaaa
Login to View More

Abstract

The invention belongs to the technical field of production of aerospace accessories and particularly discloses a manufacturing method for a seamless steel pipe for aerospace. The problem that manufacturing of a seamless steel pipe for aerospace through an existing production method is high in cost is solved. The manufacturing method for the seamless steel pipe for aerospace comprises the steps of steel billet making, rolling, hot sizing, stretch reducing and annealing. According to the manufacturing method, the seamless steel pipe for aerospace is manufactured through steel billet making, rolling, hot sizing, stretch reducing, annealing and other process steps, the electroslag scaling billet forging step is canceled, a steel billet is directly rolled by a pilgrim rolling unit to obtain an initial-pass pipe billet, then a finished pipe with the corresponding specifications is obtained through a twice-sizing mode, on the premise that the effect that the product size and performance meet requirements is ensured, the production cost of per ton of pipes is lowered by about 9%, thus the products have larger economic actual effects, and market competitiveness of the products is improved.

Description

technical field [0001] The invention belongs to the production technical field of aerospace accessories, and in particular relates to a manufacturing method of seamless steel pipes for aerospace. Background technique [0002] As the development of the aerospace industry enters a new stage, high-level or ultra-high-level aerospace activities are more frequent, and the development of aerospace technology greatly leads and promotes the development of aerospace materials, pushing aerospace materials towards higher quality. High-end, newer categories, stronger functions and more economical and effective direction. 30CrMnSiA is a typical Cr-Mn-Si system medium carbon quenched and tempered steel, which is characterized by high specific strength and high hardness. Important parts with medium cross-sections under load, such as aircraft landing gear, engine mounts, wing girders, spar joints, seamless steel pipes, etc., are currently the most widely used steels in aircraft structures....

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
Patent Type & Authority Applications(China)
IPC IPC(8): B21C37/06
CPCB21C37/06
Inventor 白青青
Owner CHENGDU ADVANCED METAL MATERIALS IND TECH RES INST CO LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com