Duplex stainless steel wire material, steel wire, bolt, and method for production of the bolt

A technology for steel wire and bolts, which is applied in the field of duplex stainless steel wire and soft duplex stainless steel wire. It can solve the problems of difficult cold workability of wire rods, without considering the characteristics of softness and high tensile fracture shrinkage, and achieves excellent cold workability. , the effect of excellent cold forging

Active Publication Date: 2010-08-25
NIPPON STEEL STAINLESS STEEL CORP
View PDF16 Cites 13 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the examples, the steel containing 0.08% or more of nitrogen to improve the strength is described in order to improve the deep drawability of the steel sheet by improving the ductility. Cold workability is difficult
As mentioned above, among

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
  • Duplex stainless steel wire material, steel wire, bolt, and method for production of the bolt
  • Duplex stainless steel wire material, steel wire, bolt, and method for production of the bolt
  • Duplex stainless steel wire material, steel wire, bolt, and method for production of the bolt

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

Embodiment 2

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
Tensile strengthaaaaaaaaaa
Login to view more

Abstract

Disclosed is an austenite-ferrite duplex steel wire material for a high-strength, high-corrosion-resistant bolt, which has excellent cold forgeability. The steel wire material comprises the following components (by mass): C: 0.005-0.05%, Si: 0.1-1.0%, Mn: 0.1-10.0%, Ni: 1.0-6.0%, Cr: 19.0-30.0%, Cu: 0.05-3.0% and N: 0.005-0.20%, with the remainder being Fe and substantially unavoidable impurities, wherein the total content of C and N is 0.20% or less, the M value represented by the formula (a) below is 60 or less, the F value represented by the formula (b) is 45 to 85, and the tensile strength is 550 to 750 N/mm2. M = 551-462(C+N)-9.2Si-8.1Mn-29(Ni+Cu)-13.7Cr-18.5Mo (a) F = 5.6Cr-7.1Ni+2.4Mo+15Si-3.1Mn-300C-134N-26.6 (b).

Description

technical field The present invention relates to a duplex stainless steel wire rod excellent in cold forgeability, and provides, for example, a high-strength bolt having corrosion resistance equivalent to that of SUS304 at low cost. The present invention relates to a soft duplex stainless steel wire material with magnetizability and excellent cold workability, and more specifically to screws, pins, metal meshes, steel wires, steel cables, springs, etc., which can be provided at low cost and have corrosion resistance equivalent to, for example, SUS304 and SUS316 Soft duplex stainless steel wire material with strong cold workability and excellent cold workability with magnetization imparted at the same time. This application claims priority based on Japanese Patent Application No. 2007-264992 filed in Japan on October 10, 2007, and Japanese Patent Application No. 2007-264993 filed in Japan on October 10, 2007, the contents of which are incorporated herein by reference. Backgr...

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): C22C38/00C21D6/00C21D9/00C22C38/58
CPCC21D6/02C22C38/42C22C38/002C22C38/02C21D2211/005C21D9/56C22C38/58C21D2211/001C22C38/44C22C38/001C21D8/06C21D6/004C21D7/02C21D8/065C21D9/0093C21D9/02C21D9/525
Inventor 高野光司柘植信二天藤雅之森祐司多田好宣
Owner NIPPON STEEL STAINLESS STEEL CORP
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