Refined austenitic alloy for internal combustion engine valve and its production process

An austenitic and internal combustion engine technology, applied in the field of refined austenitic alloys for internal combustion engine valves and its production technology, can solve the problems of high preparation costs and other issues

Inactive Publication Date: 2011-12-28
JIANGSU XINGHAI SPECIAL STEEL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the high content of N

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Example 1: An austenitic alloy for an internal combustion engine valve, its composition mass percentage is: C0.63, Si0.15, Mn11.33, P0.027, S0.013, Cr21.86, N0.58 , Nb1.13, Ni1.36, V0.87, the balance is Fe and unavoidable impurities. The production technology of described austenitic alloy:

[0018] (1) Vacuum induction furnace, bottom-blown argon refining: put the raw materials containing the above components into a vacuum induction furnace to melt, the temperature in the furnace is 1450~1470°C, use the bottom-blown argon refining process to remove oxide impurities, The vacuum reduces the gas pressure in the furnace, so that the content of oxygen, nitrogen and hydrogen in the alloy is significantly reduced;

[0019] (2) Continuous casting and rolling: the smelted alloy liquid enters the continuous casting tundish, and the nitrogen flow is turned on to heat the storage heat exchanger, forming a nitrogen flow for heating, preventing re-oxidation of the alloy liquid in th...

Embodiment 2

[0023] Embodiment 2: An austenitic alloy for an internal combustion engine valve, its composition mass percentage is: C0.57, Si0.15, Mn9.53, P0.018, S0.013, Cr20.16, N0.41 , Nb1.03, Ni1.06, V0.75, the balance is Fe and unavoidable impurities. The production technology of described austenitic alloy:

[0024] (1) Vacuum induction furnace, bottom-blown argon refining: put the raw materials containing the above components into a vacuum induction furnace to melt, the temperature in the furnace is 1450~1470°C, use the bottom-blown argon refining process to remove oxide impurities, The vacuum reduces the gas pressure in the furnace, so that the content of oxygen, nitrogen and hydrogen in the alloy is significantly reduced;

[0025] (2) Continuous casting and rolling: the smelted alloy liquid enters the continuous casting tundish, and the nitrogen flow is turned on to heat the storage heat exchanger, forming a nitrogen flow for heating, preventing re-oxidation of the alloy liquid in ...

Embodiment 3

[0029] Embodiment 3: An austenitic alloy used for an internal combustion engine valve, its composition mass percentage is: C0.6, Si0.15, Mn10.43, P0.023, S0.013, Cr21.01, N0.50 , Nb1.08, Ni1.21, V0.81, the balance is Fe and unavoidable impurities. The production technology of described austenitic alloy:

[0030] (1) Vacuum induction furnace, bottom-blown argon refining: put the raw materials containing the above components into a vacuum induction furnace to melt, the temperature in the furnace is 1450~1470°C, use the bottom-blown argon refining process to remove oxide impurities, The vacuum reduces the gas pressure in the furnace, so that the content of oxygen, nitrogen and hydrogen in the alloy is significantly reduced;

[0031] (2) Continuous casting and rolling: the smelted alloy liquid enters the continuous casting tundish, and the nitrogen flow is turned on to heat the storage heat exchanger, forming a nitrogen flow for heating, preventing re-oxidation of the alloy liqui...

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PUM

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Abstract

The invention discloses a refined austenitic alloy for internal combustion engines. 0.027, S0.013, Cr20.16~21.86, N0.41~0.58, Nb1.03~1.13, Ni1.06~1.36, V0.75~0.87, the balance is Fe and impurities. The method includes the following steps: vacuum induction furnace, bottom blowing argon refining, continuous casting, continuous rolling, solid solution, water cooling, straightening and polishing. The object of the present invention is to provide an austenitic alloy for gas valve with reasonable composition design, good product comprehensive performance, low nickel content, greatly reduced energy consumption in production, and low preparation cost and its production process.

Description

technical field [0001] The invention relates to the field of preparation of austenitic alloys, in particular to a refined austenitic alloy for an internal combustion engine valve and a production process thereof. Background technique [0002] The main material of the engine and exhaust valve is valve alloy steel, which is widely used in various engines and is the key working component of the engine. The harsh working conditions require it to have high temperature resistance, wear resistance and corrosion resistance. Therefore, the study of alloy materials with the aforementioned properties is one of the urgent problems to be solved in the field of alloys for gas valves. [0003] So far, there is no new type of material that is resistant to high temperature, wear and corrosion in China; usually, the industry uses pure high temperature resistant alloys or simple wear-resistant materials. Although the former has good high temperature resistance, it is wear-resistant. Insuffici...

Claims

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Application Information

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IPC IPC(8): C22C38/58
Inventor 刘庄根计建康邱爱华孙建平陈来勇
Owner JIANGSU XINGHAI SPECIAL STEEL
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