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Fine-grain anti-fatigue gas valve steel wire rod and manufacture method thereof

A technology of anti-fatigue and valve steel, applied in the field of materials, can solve the problems of not too much deformation in each pass, obvious work hardening, and large energy consumption, and achieve energy saving and man-hours, improved work hardening, and high dimensional accuracy Effect

Active Publication Date: 2016-05-25
CHONGQING MATERIALS RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, it should also be noted that due to the characteristics of the valve steel material itself, the cold drawing process still needs to overcome two major difficulties: low plasticity, and the deformation of each pass should not be too large, otherwise it is easy to break during the drawing process; the work hardening is obvious , multiple tempering is required to eliminate the internal stress of processing, large energy consumption and long working hours

Method used

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  • Fine-grain anti-fatigue gas valve steel wire rod and manufacture method thereof
  • Fine-grain anti-fatigue gas valve steel wire rod and manufacture method thereof
  • Fine-grain anti-fatigue gas valve steel wire rod and manufacture method thereof

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Embodiment Construction

[0035] According to the proportioning described in table 1, get each component described in the present invention, prepare material described in the present invention as follows:

[0036] Table 1 chemical composition list (wt%)

[0037] element name

scope

Example

comparative example

Ni

25.0-36.0

32.5

32.0

Cr

14.0-20.0

14.55

14.5

Ti

1.9-3.0

2.86

2.90

Al

0.5-2.6

1.75

1.50

Mo

0.7-1.2

0.77

0.7

Nb

0.4-0.7

0.56

0.55

mn

0.2-1.0

0.36

0.35

Cu

≤0.01

0.0059

0.20

Si

≤0.1％

0.021

0.15

C

0.02-0.1

0.027

0.07

S

≤0.005

0.0032

0.018

P

≤0.002

0.001

0.018

B

0.003-0.015

0.0073

0.008

Mg

0.01-0.3

0.042

0.04

Zr

0.001-0.04

0.03

/

N

0.01-0.1

0.08

/

Y

0.001-0.05

0.03

...

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Abstract

The invention relates to a fin-grain anti-fatigue gas valve steel material, comprising the elements such as Ni, Cr, Ti, Al, Mo, Nb, Mn, C, B, Mg, Zr, N, Y and Fe. Plasticity of the gas valve steel is improved by grain refining, further grain refining is achieved by using a simple and efficient cold drawing process, plasticity index is increased by above 6-10%, gas valve elector-heading is facilitated, and the gas valve steel can meet the requirements for high strength in a stick work environment at 780-950 DEG C and for fatigue resistance under repeated flushing. Experiments show that the material has good high-temperature rotational flexural fatigue performance; high-temperature creep performance shows that the material of the invention has sufficient creep strength to prevent gas valve failure.

Description

technical field [0001] The invention belongs to the field of materials, and in particular relates to a fine grain anti-fatigue valve steel rod wire and a manufacturing method thereof. Background technique [0002] Air valve steel specifically refers to the alloy material used to manufacture engine intake and exhaust valves. It needs to work under the conditions of high temperature, high pressure, high erosion, high corrosion, and high frequency. Due to the harsh working conditions, the plasticity, fatigue performance, and High temperature strength, hot hardness, wear resistance, corrosion resistance and other requirements are very high, which makes the manufacture and production of valve steel highly professional. In the production process of valve steel, due to the characteristics of high hardness, low plasticity and obvious work hardening of valve steel, the production and processing of valve steel is more difficult. [0003] At present, the production of valve steel is m...

Claims

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Application Information

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IPC IPC(8): C22C38/54C22C38/50C22C38/48C22C38/44C22C38/06C22C38/04C22C30/00C21D8/06C21D6/00C22F1/00
CPCC21D6/004C21D6/005C21D8/06C22C30/00C22C38/001C22C38/002C22C38/005C22C38/04C22C38/06C22C38/44C22C38/48C22C38/50C22C38/54C22F1/00
Inventor 莫燕王东哲吴畏刘海定张志国万红
Owner CHONGQING MATERIALS RES INST
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