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Martensitic stainless steel

A martensitic stainless steel, unit technology, applied in the field of metal materials, can solve the problems of unsatisfactory acid corrosion resistance, expensive Ni, wear resistance not as good as 4Cr13, etc.

Inactive Publication Date: 2005-09-07
章邦东
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] Note 1. Because Ni is expensive, Ni in domestic 3Cr13Mo steel generally only exists as residual elements
[0009] Note 2. Because Ni is expensive, Ni in domestic 4Cr13 steel generally only exists as residual elements
[0010] Among them, the tensile strength of 3Cr13Mo is only 800N / mm due to the low content of C and Cr. 2 Or so, the hardness is not as high as 4Cr13, and the wear resistance is not as good as 4Cr13. Because the Mo content is low and does not contain Ni, its acid corrosion resistance is not ideal.
[0011] 4Cr13 has higher tensile strength, hardness and wear resistance because of its higher C content than 3Cr13Mo, but its brittleness increases with the increase of C content
Does not contain Mo and Ni elements, so its corrosion resistance is poor

Method used

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  • Martensitic stainless steel

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Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0031] Smelting adopts electric furnace + electroslag remelting process;

[0032] Tensile strength: Ф120 round: σ b =840N / mm 2 ;

[0033] Elongation: Ф120 Circle: δ 5 = 20%.

[0034] C

Si

mn

P

S

Cr

Ni

Cu

Mo

Al

Fe

0.40

0.270

0.620

0.035

0.009

16.25

0.68

0.11

1.02

0.02

the remaining

[0035] The smelting adopts the electric furnace + refining process outside the furnace,

[0036] Tensile strength: Ф80 round 2: σ b =1110-1130N / mm 2 ,

[0037] Ф100 circle 2: σ b =1050-1060N / mm 2 ,

[0038] Elongation rate: Ф80 circle 2: δ 5 =12.5%-13%,

[0039] Ф100 circle 2: δ 5 = 13%-14%.

[0040] C

Si

mn

P

S

Cr

Ni

Cu

Mo

Fe

0.41

0.33

0.90

0.030

0.009

18.00

0.23

0.20

1.10

the remaining

...

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Abstract

The present invention relates to a metal material, in the concrete, it is aimed at providing a high-strength, high-hardness, high-wearability and corrosion-resistant new material for die equipment and optical fibre industries, etc. The material mainly is composed of 0.35-0.45 wt% of C. Si whose content is greater than or equal to 0.50 wt%, 0.50-0.90 of Mn, P whose content is greater than or equal to 0.035 wt%, S whose content is greater than or equal to 0.020 wt%, 16.00-18.00 wt% of Cr, 0.10-0.70 wt% of Ni, Cu whose content is greater than or equal to 0.25 wt%, 1.0-1.25 wt% of Mo, V whose content is greater than or equal to 0.50 wt% and the rest is iron. It can raise the strength, hardness, wearability and corrosion-resistant properties of the stainless steel.

Description

technical field [0001] The invention relates to metal materials, specifically a new acid-corrosion-resistant material with high strength, high hardness and high wear resistance, which aims to be developed for my country's mold, chemical fiber and other industries. Background technique [0002] According to GB1220-92, there are 18 grades of martensitic stainless steel in my country, among which materials with higher strength, higher hardness, and higher wear resistance and acid corrosion resistance are: [0003] a.3Cr13Mo: a material with high hardness and high wear resistance. [0004] b.4Cr13: A material with high hardness and high wear resistance. [0005] c.1Cr17Ni2: a material with high strength and corrosion resistance to nitric acid and organic acid. [0006] Its chemical composition is as follows: [0007] [0008] Note 1. Because Ni is expensive, Ni generally only exists as residual elements in domestic 3Cr13Mo steel. [0009] Note 2. Because Ni is expensive, ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C38/44
Inventor 章邦东
Owner 章邦东