Supercharge Your Innovation With Domain-Expert AI Agents!

A high-hardness, corrosion-resistant cast stainless steel for fluid delivery

A technology of fluid transportation and stainless steel, which is applied in the field of high-hardness corrosion-resistant cast stainless steel, which can solve the problems of loss, thin thickness, waste, etc., and achieve the effect of hardness improvement and high corrosion resistance

Active Publication Date: 2019-06-28
LUOYANG SUNRUI SPECIAL EQUIP
View PDF8 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Caused a huge waste of materials and manpower
[0004] The existing technology usually solves the wear problem by partial surfacing or spraying wear-resistant coatings, but due to the high brittleness, thin thickness, high price, and high requirements on the manufacturing process of the wear-resistant layer, abnormal failures are prone to occur during actual use , leading to downtime and huge losses
Therefore, such solutions are usually not used for important fluid delivery occasions

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
  • A high-hardness, corrosion-resistant cast stainless steel for fluid delivery

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 2

[0032] The chemical composition percentage of the casting is: C: 0.028%, Si: 0.516%, Mn: 0.803%, S: 0.01%, P: 0.038%, Cr: 25.8%, Ni: 4.79%, Mo: 4.1%, Cu: 2.68% ,N:0.12%

[0033] After solution treatment at 1130 degrees and hardening treatment at 850 degrees, the casting hardness reaches 43HRC.

Embodiment 3

[0035] The chemical composition percentage of stainless steel castings is: C: 0.012%, Si: 0.43%, Mn: 1.2%, S: 0.02%, P: 0.035%, Cr: 26.1%, Ni: 4.76%, Mo: 4.6%, Cu: 1.5 %,N:0.10%

[0036] After solution treatment at 1150 degrees and hardening treatment at 850 degrees, the casting hardness reaches 46HRC.

[0037] (4) Embodiment 4

[0038]The chemical composition percentage of the casting is: C: 0.012%, Si: 0.43%, Mn: 1.2%, S: 0.02%, P: 0.035%, Cr: 26.1%, Ni: 4.76%, Mo: 4.6%, Cu: 1.5% ,N:0.10%

[0039] After solution treatment at 1170 degrees and hardening treatment at 850 degrees, the casting hardness reaches 47HRC.

[0040] (5) Example 5

[0041] The chemical composition percentage of the casting is: C: 0.014%, Si: 0.35%, Mn: 0.68%, S: 0.01%, P: 0.02%, Cr: 26%, Ni: 5.2, Mo, 4.4%, Cu: 3.5%, N: 0.05%.

[0042] After solution heat treatment at 1150 degrees and age hardening at 530 degrees, the casting hardness reaches 39HRC.

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

No PUM Login to View More

Abstract

A high-hardness corrosion-resistant cast stainless steel used for fluid transportation. The chemical composition of the stainless steel casting contains C≤0.03%, Si≤1%, Mn≤2%, S≤0.03%, P≤0.04%, Cr: 25 ~28%, Ni: 4~6%, Mo: 4~8%, Cu: 0~5%, N: 0~0.3%, the rest is Fe and unavoidable impurities, Mo / Ni range is 0.75‑1.5, PREN=(Cr+3.3*Mo+16*N)≥41; the manufacturing process is: smelting, casting, solid solution, hardening treatment, through composition improvement, the content of solid solution ferrite is much higher than that of ordinary duplex stainless steel The microstructure, duplex stainless steel phase ratio requirement (30% ~ 70%), the ferrite content of the invented material is ≥ 70%, realizes a substantial increase in the hardness of stainless steel, and further achieves high corrosion resistance and high hardness through smelting, casting, solid solution, and hardening treatments performance.

Description

technical field [0001] The invention belongs to the technical field of high-hardness corrosion-resistant stainless steel, in particular to a high-hardness corrosion-resistant cast stainless steel used for fluid transportation. Background technique [0002] Existing stainless steels include austenitic stainless steel, ferritic stainless steel, martensitic stainless steel, duplex stainless steel, precipitation hardening stainless steel, etc. Among them, except for martensitic stainless steel and precipitation hardening stainless steel, which can be strengthened by heat treatment, the rest of the stainless steel is usually in solid solution. If it is used in the normal state, the hardness is low, and it is difficult to meet the requirements of cavitation erosion and abrasive wear during fluid transportation. If medium temperature precipitation strengthening is used, the corrosion resistance of the material is usually seriously affected due to local depletion of elements due to p...

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): C22C38/44C22C38/42C22C38/02C22C38/58C22C38/04C21D6/00
CPCC21D6/004C21D2211/005C22C38/001C22C38/02C22C38/04C22C38/42C22C38/44C22C38/58
Inventor 范芳雄刘军王灵水李春合梁晓辉
Owner LUOYANG SUNRUI SPECIAL EQUIP
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