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Heat-resistance stainless steel exhaust pipe and manufacturing method thereof

A heat-resistant stainless steel and exhaust pipe technology, applied in pipes, rigid pipes, mechanical equipment, etc., can solve problems such as low yield, low dimensional accuracy, and prone to cracks.

Inactive Publication Date: 2012-05-09
西峡飞龙特种铸造有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, the production process of ordinary exhaust pipes has the problems of variable castings, cracks at higher temperatures, low dimensional accuracy, and low yield.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Heat-resistant stainless steel exhaust pipe, its formula and mass ratio are:

[0037] Low carbon steel 11.42 parts

[0038] 70 parts of this material returned to furnace steel

[0039] 0.3 parts of electrolytic manganese

[0040] 0.4 parts of 75# ferrosilicon

[0041] 4.1 parts of electrolytic nickel

[0042] 13 parts ferrochrome

[0043] Deoxidizer 0.05 parts

[0044] Iron sulfur 0.07 parts

[0045] Ferroniobium 0.56 parts

[0046] Carburizer 0.15 parts

[0047] Through the adjustment of the formula of electrolytic nickel, ferrochrome and iron sulfur, the characteristics of Ni and Cr can be fully utilized, and the scientific ratio can ensure the product's high temperature resistance, corrosion resistance and thermal fatigue resistance. By adding a certain amount of S, The processing performance of the heat-resistant stainless steel exhaust pipe material is improved.

[0048] The nickel content of electrolytic nickel is greater than 99.99%. Impurity content in...

Embodiment 2

[0057] Heat-resistant stainless steel exhaust pipe, its formula and mass ratio are:

[0058] Low carbon steel 24.74 parts

[0059] 35 parts of this material, remelted steel

[0060] Electrolytic manganese 0.62 parts

[0061] 0.87 parts of 75# ferrosilicon

[0062] Electrolytic nickel 8.94 parts

[0063] Ferrochrome 28.17 parts

[0064] Deoxidizer 0.8 part

[0065] Iron sulfur 0.16 parts

[0066] Ferroniobium 1.2 parts

[0067] Carburizer 0.3 part

[0068] Through the adjustment of the formula of electrolytic nickel, ferrochrome and iron sulfur, the characteristics of Ni and Cr can be fully utilized, and the scientific ratio can ensure the product's high temperature resistance, corrosion resistance and thermal fatigue resistance. By adding a certain amount of S, The processing performance of the heat-resistant stainless steel exhaust pipe material is improved.

[0069]The nickel content of electrolytic nickel is greater than 99.99%. Impurity content in low carbon stee...

Embodiment 3

[0077] Heat-resistant stainless steel exhaust pipe, its formula and mass ratio are:

[0078] Low carbon steel 38.66 parts

[0079] 0.8 parts of electrolytic manganese

[0080] 0.7 parts of 75# ferrosilicon

[0081] 13.75 parts of electrolytic nickel

[0082] 43.5 parts of ferrochrome

[0083] Deoxidizer 1 part

[0084] Iron sulfur 0.24 parts

[0085] Ferroniobium 1.85 parts

[0086] Carburizer 0.5 parts

[0087] Through the adjustment of the formula of electrolytic nickel, ferrochrome and iron sulfur, the characteristics of Ni and Cr can be fully utilized, and the scientific ratio can ensure the product's high temperature resistance, corrosion resistance and thermal fatigue resistance. By adding a certain amount of S, The processing performance of the heat-resistant stainless steel exhaust pipe material is improved.

[0088] The nickel content of electrolytic nickel is greater than 99.99%. Impurity content in low carbon steel: ferrochrome Cr≥60%, carbon≤0.06%, silicon...

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Abstract

The invention discloses a heat-resistance stainless steel exhaust pipe and a manufacturing method thereof. According to a formula, the heat-resistance stainless steel exhaust pipe comprises the following components in part by mass: 11.42 to 38.66 parts of low-carbon steel, 0 to 70 parts of material remelted steel, 0.3 to 0.8 part of electrolytic manganese, 0.4 to 0.7 part of ferrosilicon, 4.1 to 13.75 parts of electrolytic nickel, 13 to 43.5 parts of ferrochromium and 0.05 to 0.1 part of deoxidizer. The preparation method comprises the following steps of: performing shot blasting, preparing materials, smelting, pouring, filling molds, shaking out sand and the like. The heat-resistance stainless steel exhaust pipe overcomes a large number of defects in the prior art, and has the advantagesof high product size precision, durability, low deformation rate, simple preparation process and high yield.

Description

technical field [0001] The invention relates to an exhaust pipe and a preparation method thereof, in particular to a heat-resistant stainless steel exhaust pipe and a preparation method thereof. Background technique [0002] In recent years, China's auto market has grown rapidly, incorporating a number of scientific and technological advancements. Under the double pressure of energy crisis and environmental protection, the development of electronic technology, turbocharger technology and turbocharger manufacturing technology of contemporary automobile interact with each other, which makes the working temperature of engine exhaust pipe rise, and the materials of exhaust pipe are affected. severe test. [0003] Heat-resistant stainless steel exhaust pipe is an environmentally friendly product with high efficiency, energy saving and high technological content. And other advantages, has become the standard configuration of modern cars, especially high-end cars. [0004] At pr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16L9/02C21C5/52C22C38/48C21C7/06B22C9/24
CPCY02P10/20
Inventor 田中青刘松奇李平衡张启奎杨双杰
Owner 西峡飞龙特种铸造有限公司
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