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

Free-cutting stainless-steel material for precision processing and process for producing same

A precision machining, stainless steel technology, applied in the direction of manufacturing tools, furnace types, furnaces, etc., can solve the problems of undisclosed surface properties, corrosion resistance, easy-cutting stainless steel raw materials, etc., to achieve electrical energy consumption, meet processing accuracy, and excellent processing accuracy Effect

Inactive Publication Date: 2015-01-14
NAT INST FOR MATERIALS SCI
View PDF1 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Thus, a free-cutting stainless steel raw material for precision machining with excellent surface properties after machining and excellent corrosion resistance and a method for producing the same have not been disclosed until now.

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
  • Free-cutting stainless-steel material for precision processing and process for producing same
  • Free-cutting stainless-steel material for precision processing and process for producing same
  • Free-cutting stainless-steel material for precision processing and process for producing same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] (Example 1) A commercially available austenitic stainless steel (SUS304) round bar (weight 2 kg) was used as a melting raw material, and was melted using a water-cooled crucible suspension melting furnace (Japanese: Koldkuru-shibur floating melting furnace). The component composition (mass %) of the molten raw material was 0.06% C, 0.28% Si, 1.33% Mn, 0.035% P, 0.025% S, 8.05% Ni, and 18.39% Cr. During melting, N was sealed in the vacuum induction melting furnace at 0.07 MPa to adjust the N concentration in the molten steel. After melting, add a specified amount of commercially available ferroboron (19.2 mass% B) to the molten metal, adjust the B concentration, melt in a weakly reduced pressure N atmosphere, and then keep it at 1600°C for 10 minutes, and then cool it in water. solidified in a crucible to make ingots. The ingot was forged and rolled at 1200° C., processed into a 14 mm square bar, and air-cooled. The bar was subjected to water cooling after holding at 1...

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
particle diameteraaaaaaaaaa
diameteraaaaaaaaaa
Login to View More

Abstract

The present invention provides a free-cutting stainless steel material for precision machining capable of attaining all of excellent cutting accuracy, machinability, corrosion resistance, and environmental friendliness at the same time and a method for producing the same material. The free-cutting stainless steel material for precision machining of the present invention is used for forming performed by cutting of a micrometer level, and is characterized in that a free-cutting additive is h-BN particles that are distributed in a simple substance state in a steel. Also, the method for producing the free-cutting stainless steel material for precision machining of the present invention is characterized in that a free-cutting stainless steel material for precision machining in which h-BN particles precipitate is heated followed by rapid cooling to make the h-BN particles once dissolve and disappear, and subsequently is tempered, whereby the h-BN particles are dispersedly precipitated again evenly in the material.

Description

technical field [0001] The present invention relates to a free-cutting stainless steel raw material for precision machining formed by micron-order cutting. Background technique [0002] Conventionally, stainless steel has been used as a raw material for machining precision parts in order to take full advantage of its corrosion resistance. However, in precision machining, stainless steel is more difficult to cut than ordinary steel, so it is desired to improve its machinability. Sulfur free-cutting stainless steel SUS303 is widely known as a stainless steel with improved machinability, but its surface becomes rough after cutting, and it is considered difficult to use it for micron-order precise cutting. In other words, it is considered that conventional stainless steels do not have machinability and precision workability (surface roughness after cutting) at the same time. [0003] International patent application WO2008 / 016158 discloses a free-cutting stainless steel capable...

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 Patents(China)
IPC IPC(8): C22C38/00C21C7/00C21C7/04C21C7/072C21C7/10C21D6/00C22C38/54
CPCC21C7/072C22C38/54C21C5/005C21D9/00C22C33/04C22C38/002C21C2007/0018C22C38/04C22C38/40C21D6/004C21C7/0006C21D6/002C21D9/0068C22C38/02C22C38/001C22C38/00
Inventor 江村聪山本重男樱谷和之津崎兼彰
Owner NAT INST FOR MATERIALS SCI
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