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

Leadless and free-cutting phosphorus-brass alloy and manufacturing method thereof

A brass alloy, free-cutting technology, applied in the field of phosphor-brass alloys, can solve problems such as lead pollution to the environment, and achieve the effects of reducing production costs, excellent cutting performance, excellent casting performance and thermoforming performance

Active Publication Date: 2008-10-15
XIAMEN LAVIDA HI TECH MATERIAL CO LTD
View PDF0 Cites 29 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to solve the problems existing in the prior art, especially the pollution problem of lead to the environment, the present invention is based on the fact that the solid solubility of phosphorus in copper decreases rapidly with the decrease of temperature and forms a brittle intermetallic compound Cu with copper. 3 The characteristics of P, phosphorus is selected as the main alloying element to ensure that the alloy has excellent cutting performance

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
  • Leadless and free-cutting phosphorus-brass alloy and manufacturing method thereof
  • Leadless and free-cutting phosphorus-brass alloy and manufacturing method thereof
  • Leadless and free-cutting phosphorus-brass alloy and manufacturing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0024] Alloys were prepared according to the alloy compositions of Examples 1-10 in Table 1. Some alloy ingots are used for forging, some are used for remelting and low-pressure casting, and some are used for extruding rods. The cutting performance, casting performance, dezincification corrosion and mechanical performance testing were carried out. The ingot forging temperature is 570-700°C, the extrusion temperature is 560-680°C, the low-pressure casting temperature is 980-1000°C, and the stress relief annealing temperature is 350-450°C.

[0025] Table 1 Lead-free free-cutting phosphorus brass alloy composition (weight %)

[0026]

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
shrinkageaaaaaaaaaa
Login to View More

Abstract

The invention provides a lead-free cutting-free alloy and a preparation method thereof. The components (weight percentage) of the alloy are: more than 97.0 but not equal to 99.5 of (copper + zinc), more than 35.0 of zinc, 0.4-1.6 of phosphor and 0.005-0.6 of at least two other elements selected from aluminum, silicon, antimony, stannum, lanthanon, titanium and boron, the balance being zinc and impurities, wherein, the zinc content is more than 35.0 (weight percentage). The invention also provides a preparation method for the lead-free cutting-free high phosphor brass alloy. The alloy of the invention has excellent machinability, castibility, welding property, dezincification corrosion resisting property, formability and mechanical property, and is particularly suitable for forged pieces and low-pressure cast castings needing cutting processing, grinding processing (polish), welding and plating, such as hydrants, valve bodies and bushings in a water supply system.

Description

technical field [0001] The invention relates to a phosphor brass alloy, in particular to a lead-free free-cutting phosphor brass alloy suitable for water supply system forgings or castings and a manufacturing method thereof. Background technique [0002] Lead-containing brass alloy materials are still widely used as structural materials for many products because of their excellent cutting properties, hot and cold forming properties, and low production costs. However, during the production and use of lead brass, lead will pollute the environment and cause harm to the human body, which has attracted people's attention. Therefore, the application of lead-containing materials, including lead brass, is increasingly restricted. . In order to meet this challenge, in recent years, domestic and foreign countries have actively researched and developed lead-free free-cutting brass alloys. The bismuth brass and tellurium brass that have been researched and developed are the two lead-f...

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): C22C9/04C22C1/02
CPCC22C9/04
Inventor 许传凯胡振青章四琪
Owner XIAMEN LAVIDA HI TECH MATERIAL 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