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Application of Chang'e steel in preparation of valve guide pipe or multi-step complex structural member, valve guide pipe, multi-step complex structural member and preparation of valve guide pipe and multi-step complex structural member

A technology of valve guides and complex structures, which is applied to mechanical equipment, engine components, lift valves, etc., and can solve problems such as uneven density, complex shapes of structural parts, and multiple steps

Inactive Publication Date: 2022-01-04
安徽金亿新材料股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At the same time, for multi-step complex structural parts, the problem of uneven density is also caused by the complex shape of the structural parts or multi-step problems.

Method used

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  • Application of Chang'e steel in preparation of valve guide pipe or multi-step complex structural member, valve guide pipe, multi-step complex structural member and preparation of valve guide pipe and multi-step complex structural member
  • Application of Chang'e steel in preparation of valve guide pipe or multi-step complex structural member, valve guide pipe, multi-step complex structural member and preparation of valve guide pipe and multi-step complex structural member
  • Application of Chang'e steel in preparation of valve guide pipe or multi-step complex structural member, valve guide pipe, multi-step complex structural member and preparation of valve guide pipe and multi-step complex structural member

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Experimental program
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preparation example Construction

[0046] In the present invention, there is no special limitation on the preparation process of the Chang'e steel, and it is enough to adopt the process well known to those skilled in the art and obtain the alloy with the above-mentioned composition ratio.

[0047] In the present invention, the Chang'e steel has high strength and toughness, high energy absorption, low magnetism and corrosion resistance.

[0048] In the present invention, the elongation after fracture of the Chang'e steel is 70-110%, the yield strength is 250-800MPa, and the tensile strength is 550-1350MPa (when the tensile strength is 550MPa, the elongation after fracture is ≥70%; When the tensile strength is 1350MPa, the elongation after fracture is ≥10%), the low-cycle fatigue life is 80 times that of iron-based powder, and the material flow rate is > s / 80g (the flow rate of traditional powder metallurgy materials is > s / 50g);

[0049]The strong-plastic product (the product of tensile strength and elongation a...

Embodiment 1

[0110] Chang'e steel: C 1.2%, Cu 35%, Cr 8.7%, Mo 11.5%, Co 15.3%, Ni 3.8%, V18.50%, W4.8% and Mn 1.2%;

[0111] 25% Chang'e steel powder, 1.4% graphite powder, 1% copper powder, 2.2% molybdenum powder, 1.2% nickel powder, 2.4% ferromanganese powder (the mass ratio of manganese and iron is 4:100) and 64.8% iron-based powder Mix; obtain alloy powder;

[0112] Spray 2.0% high-temperature lubricant (P11 release agent and zinc stearate with a mass ratio of 1:1) in the alloy powder by high-pressure spraying to obtain valve guide precursor powder;

[0113] The valve guide precursor powder is sequentially hydroformed (temperature is 140°C, pressure is 62KN, time is 4s, and the compacted density after forming is 7.3-7.5g / cm 3 ), to obtain molded parts;

[0114] The molded parts obtained after the warm pressing molding are placed in a sintering mold for vertical push rod sintering: protective atmosphere: the flow rate of ammonia decomposition gas is 8Nm 3 , the nitrogen flow rate is...

Embodiment 2

[0117] Chang'e Steel: C 1.5%, Cu 37%, Cr 8.8%, Mo 12.2%, Co 15.8%, Ni 3.7%, V 16%, W3.5%, Mn 1.5%;

[0118] 25% Chang'e steel powder, 1.4% graphite powder, 1.0% copper powder, 2.2% molybdenum powder, 1.2% nickel powder, 2.4% ferromanganese powder (the mass ratio of manganese and iron is 4:100) and 64.8% iron-based powder Mix;; Obtain alloy powder;

[0119] Spray 2.0% high-temperature lubricant (P11 release agent and zinc stearate with a mass ratio of 1:1) in the alloy powder by high-pressure spraying to obtain valve guide precursor powder;

[0120] The valve guide precursor powder is sequentially hydroformed (the temperature is 135°C, the pressure is 63KN, the time is 4s, and the compacted density after forming is 7.3-7.5g / cm 3 ) to obtain molded parts;

[0121] The molded part obtained after the hydroforming is placed in a sintering mold for vertical push rod sintering: protective atmosphere: the flow rate of ammonia decomposition gas is 8Nm 3 , the nitrogen flow rate is 1...

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Abstract

The invention relates to the technical field of alloy materials, and particularly relates to application of Chang'e steel in preparation of a valve guide pipe or a multi-step complex structural member, the valve guide pipe, the multi-step complex structural member and preparation of the valve guide pipe and the multi-step complex structural member. The invention provides application of the Chang'e steel in preparation of the valve guide pipe or the multi-step complex structural member, and the Chang'e steel comprises the following components of, in percentage by mass, 1%-2% of C, 30%-40% of Cu, 3%-10% of Cr, 7%-13% of Mo, 5%-17% of Co, 1%-5% of Ni, 6%-22.0% of V, 3%-6% of W and 1%-2% of Mn. The Chang'e steel can effectively solve the problem of non-uniformity of compactness of parts, and meanwhile, due to the fact that the Chang'e steel has the good flow speed, the filling problem during forming of the multi-step complex structural member can be well solved.

Description

technical field [0001] The invention relates to the technical field of alloy materials, in particular to the application of Chang'e steel in the preparation of valve guides or multi-step complex structural parts, the valve guide and multi-step complex structural parts and their preparation. Background technique [0002] At present, my country's iron-based powder metallurgy products are mainly medium and low-grade products, with a density of only 6.2-6.4g / cm 3 , and because the porosity of more than 10% in the part greatly reduces the comprehensive mechanical properties of the material, and the multi-element copper in the high energy-absorbing material accounts for 30%-40%, so as to effectively fill the porosity in the part and increase the Density and heat conduction; and the flow rate of the material effectively solves the problem of product density difference for molding, making the product density difference less than 0.15mm and reducing the problem of product fracture. ...

Claims

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Application Information

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IPC IPC(8): C22C38/04C22C38/42C22C38/44C22C38/46C22C38/52C22C38/56C22C38/58C22C30/02B22F5/00B22F5/12B22F3/04B22F3/10B22F3/24B22F3/26F01L3/02F01L3/08
CPCC22C30/02C22C38/42C22C38/44C22C38/52C22C38/46C22C38/58C22C38/04C22C37/08C22C37/10C22C38/56C22C9/00C22C9/06B22F5/106B22F5/00B22F3/04B22F3/1007B22F3/26B22F3/1017B22F3/24F01L3/08F01L3/02B22F2003/247
Inventor 戴泽玉虞学青王厚发
Owner 安徽金亿新材料股份有限公司
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