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

Steel projection material

A shot peening and quality technology, applied in the field of iron and steel projection materials, can solve the problems of large deviations in metal structure and hardness, rapid consumption of projection materials, uneven completion of shot peening surfaces, etc., to improve hardenability and tempering hardness. Effect

Active Publication Date: 2012-07-04
SINTOKOGIO LTD
View PDF3 Cites 4 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Even if there is such a wide range of compositional deviations, it has a sufficient effect on the realization of the treatment purpose of casting shakeout and steel plate oxide removal. However, due to the large deviations in the metal structure and hardness of each steel shot, there are spraying There are problems such as unevenness in the finish of the ball surface or rapid consumption of projection materials

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
  • Steel projection material
  • Steel projection material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] In Examples 1 to 3, the chemical composition of the first aspect of the present invention was adjusted so that P and S were 0.04 to 0.05%, and the effects of C, Si, and Mn were investigated in particular. Example 1 is a composition in which C, Si, and Mn are close to the lower limit, Example 2 is a composition in which C, Si, and Mn are close to the upper limit, and Example 3 is the most common composition. The porosity, non-spherical particle ratio, and lifetime ratio of the samples of Examples 1 to 3 are not much different.

[0029] In contrast, in Comparative Example 1 in which C, Si, and Mn were lower than the composition lower limit of the first embodiment of the present invention, the porosity and non-spherical particle ratio increased, but the lifetime ratio decreased significantly. This is because the deoxidation effect at the time of melting is insufficient because C, Si, and Mn are low, and defects such as voids increase. In addition, in comparison 2 in which...

Embodiment 4

[0030] In Example 4, the influence of Al was investigated. As a result, when Al was contained in the range of 0.04 to 0.12% by mass, the porosity and non-spherical particle ratio were significantly reduced, and the lifetime ratio was also improved. This is considered to be due to the deoxidizing effect of Al.

[0031] In contrast, in Comparative Example 3 in which Al exceeded the upper limit of the range of 0.04 to 0.12% by mass %, although the porosity was low, the non-spherical particle ratio increased and the lifetime ratio also decreased. This is considered to be due to the increase of oxides formed on the surface of the melt in the case of excess Al, thereby suppressing the surface tension and degrading the shape.

Embodiment 5

[0032] In Example 5, the influence of Cr was investigated. As a result, the porosity and non-spherical The particle rate was significantly reduced, and the lifetime ratio was also increased, giving excellent results.

[0033] On the other hand, in Comparative Example 4 in which Cr exceeded the upper limit of the range of 0.1 to 1.2% by mass %, the non-spherical particle ratio increased compared with Example 5, and the lifetime ratio decreased. It is presumed that when Cr is excessive, oxides formed on the surface of the melt increase to deteriorate the shape as in the case of Al, and at the same time, carbides of Cr tend to be formed, thereby reducing toughness.

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
Hardnessaaaaaaaaaa
Login to View More

Abstract

The invention provides a steel projection material used for the treatment of shot blasting. In the prior art, the widely adopted projection material used for the treatment of shot blasting contains 0.6-1.4 % of C by mass, 0.3-1.6 % of Si by mass, 0.3-1.3 % of Mn by mass, 0.05 % or less of P by mass and 0.05 % or less of S by mass, wherein the completed surface of shot blasting is non-uniform or the projection material is quickly consumed. The projection material used for the treatment of shot blasting provided by the utility model is characterized by comprising 0.7-1.2 % of C by mass, 0.4-1.5 % of Si by mass, 0.35-1.2 % of Mn by mass, 0.05 % or less of P by mass and 0.05 % or less of S by mass, while the remaining part consists of Fe and unavoidable impurities.

Description

technical field [0001] The present invention relates to a steel-based projectile material with small variations in quality (hardness, density, metal structure) and stable shot blasting ability. Background technique [0002] Generally, cast steel containing about 1% by mass of C is widely used to manufacture iron and steel-based projectile materials, and it is mainly used for deflashing of iron-based metal blanks, removal of deposits, and oxidation of iron-based metal blanks starting from shakeout of castings. Wide-area applications such as membrane removal. [0003] As the projection materials used for these purposes, there are cut steel wires obtained by cutting hard steel wire rods, stainless steel cut wires manufactured by cutting stainless steel wires, and stainless steel shot produced by spraying stainless cast steel with water, etc. , but steel shot is the most popular projection material that can be manufactured at a lower cost. [0004] However, for example, when c...

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): C22C38/32C22C38/28C22C38/60C22C38/04
Inventor 石川政行
Owner SINTOKOGIO 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