Check patentability & draft patents in minutes with Patsnap Eureka AI!

Screw alloy for double-screw air compressor and preparation method of screw alloy

An air compressor, twin-screw technology, applied in mechanical equipment, manufacturing tools, heat treatment equipment, etc., can solve the problem of no corrosion resistance and high temperature resistance, poor wear resistance, and can not meet the screw work of the screw air compressor host. requirements and other issues, to achieve the effects of good corrosion resistance, improved service life, and excellent mechanical and mechanical properties.

Active Publication Date: 2013-05-15
上海施耐德日盛机械集团科技有限公司 +1
View PDF7 Cites 15 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although it has high wear resistance and toughness, it does not have corrosion resistance and high temperature resistance, and cannot meet the working requirements of the main screw of the screw air compressor.
[0005] Chinese patent application number: 200910212110 discloses a nickel-based alloy for steam turbine forged parts, rotor blades, stator blades, screw members and tubes, in weight %, which includes: although having excellent high temperature strength, forgeability and Welding performance, but the wear resistance is poor, and it cannot meet the working requirements of the main screw of the screw air compressor

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Formulation: Weight Percent:

[0022] C: 3.66, Si: 2.46, Mn: 0.554, S: 0.0138, P: 0.0312, Mg: 0.0381, Ce: 0.00765, La: 0.00619, Zr 0.0105, Cu: 0.0122, Cr: 0.0438, Sn: 0.0299, Mo: 0.00361 , Ni: 0.0177, B: 0.00124, Ti: 0.0349, Al: 0.0159, Pb: 0.001, Zn: 0.00275, Sb: 0.00357, and the balance was Fe.

[0023] Preparation:

[0024] (1) The electric arc furnace is used for melting, and then vacuum solid casting is used. When pouring, the mold temperature is 320 °C, the opening temperature is 2000 °C, and the mold is cooled to 100 °C after pouring;

[0025] (2) heating the product obtained in step (1) to 970-1000°C in an inert atmosphere, holding for 5 hours, cooling to 800°C with the furnace, holding for 10 hours, out of the furnace, quenching oil, and cooling to 350°C in oil ℃, take out, and cool to room temperature naturally;

[0026] (3) The product of step (2) is placed in an annealing furnace, heated to 650° C., maintained for 4 hours, cooled to 450° C. with the furna...

Embodiment 2

[0034] Recipe, weight percent:

[0035] C: 3.66%, Si: 2.46%, Mn: 0.554%, S: 0.0138%, P: 0.0312%, Mg: 0.0381%, Ce: 0.00765%, La: 0.00619%, Cu: 0.0122%, Cr: 0.0438%, Sn: 0.0299%, Mo: 0.00361%, Ni: 0.0177%, B: 0.00124%, Ti: 0.0349%, Al: 0.0159%, Pb: 0.004%, Zn: 0.00275%, Sb: 0.00357%, and the balance was Fe.

[0036] Preparation:

[0037] (1) The electric arc furnace is used for melting, and then vacuum solid casting is used. When pouring, the mold temperature is 305 °C, the opening temperature is 1900 °C, and after pouring, it is cooled to 80 °C for demoulding;

[0038] (2) the product obtained in step (1) is heated to 970°C in an inert atmosphere, kept for 3 to 3 hours, cooled to 730°C with the furnace, kept for 7 hours, released from the furnace, quenched in oil, and cooled to 310 to 310°C in oil. ℃, take out, and cool to room temperature naturally;

[0039] (3) The product of step (2) is placed in an annealing furnace, heated to 600° C., kept for 2 hours, cooled to 400° C....

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
elongationaaaaaaaaaa
Login to View More

Abstract

The invention relates to a screw alloy for a double-screw air compressor and a preparation method of the screw alloy. The screw alloy comprises the following components in percentage by weight: 3.10-3.80 percent of C, 1.75-2.50 percent of Si, 0.160-0.815 percent of Mn, 0.0030-0.0077 percent of Ce, 0.0024-0.00619 percent of Ce, 0.011-0.062 percent of Cu, 0.0289-0.113 percent of Cr, 0.0020-0.00698 percent of Mo, 0.0156-0.0259 percent of Ni, 0.0336-0.0530 percent of Ti and the balance of Fe. The screw alloy disclosed by the invention is an iron-based alloy containing rare earth and is excellent in mechanical property, resistant to high temperature and abrasion and favourable in corrosion-resistance performance; and the service life of a screw of the air compressor can be greatly prolonged.

Description

technical field [0001] The invention relates to a screw material for a twin-screw air compressor, in particular to an iron-based alloy containing rare earth. Background technique [0002] As we all know, the air compressor is a machine with a wide range of applications, including the air compressor main engine and the driving machine. Among them, the screw of the air compressor is one of the most critical components, and its performance directly affects the efficiency and service life of the compressor. [0003] At present, the screws in the main engine of conventional screw air compressors are ordinary cast iron, which has poor mechanical properties. It is difficult to apply to large compressors, such as large compressors above 100KW. [0004] Chinese Patent Application No.: 011397551 discloses a vanadium wear-resistant alloy cast iron for extrusion screw of wallboard extruder, the composition is (%): C: 2.30-3.20, Cr: 12.0-22.0, V: 2.0-6.0 , Mo: 1.0 to 2.5, Ni: ≤ 1.5, Cu...

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): C22C38/56C22C37/08C21D9/00F04C18/16
Inventor 杨春钱
Owner 上海施耐德日盛机械集团科技有限公司
Features
  • R&D
  • Intellectual Property
  • Life Sciences
  • Materials
  • Tech Scout
Why Patsnap Eureka
  • Unparalleled Data Quality
  • Higher Quality Content
  • 60% Fewer Hallucinations
Social media
Patsnap Eureka Blog
Learn More

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

© 2025 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com