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Austenitic gray cast iron material and method for making same

A grey cast iron and austenite technology, applied in the field of cast iron materials, can solve the problems of high nickel content, high cost and price, and achieve the effect of avoiding oxidation

Active Publication Date: 2008-02-06
湖南江滨机器(集团)有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0014] Aiming at the problem of high cost and high price caused by high nickel content in the current piston ring alloy material, the purpose of the present invention is to provide a new low-Ni piston ring alloy material to reduce the cost and price of this piston ring

Method used

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  • Austenitic gray cast iron material and method for making same
  • Austenitic gray cast iron material and method for making same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Add the following charge to the medium frequency induction furnace:

[0033] Pig iron 55%: containing C4.1%, Si1.6%, Mn0.24%, the balance is Fe;

[0034] Scrap steel 14%: containing C0.3%, Si0.3%, Mn0.5%, the balance is Fe;

[0035] 75 ferromanganese 8%: containing C1.6%, Si1.15%, Mn77%; Cr0.2%, the balance is Fe;

[0036] 75 ferrosilicon 2%: containing C0.1%, Si76%, Mn0.35%; Cr0.24%, the balance is Fe;

[0037] Electrolytic nickel 6%: containing more than 99.9% Ni;

[0038] Electrolytic copper 5%: containing Cu99.9% or more;

[0039] Return charge 10%: containing C2.87%, Si2.18%, Ni5.25%, Mn7.4%, Cu4.8%, the balance is Fe.

[0040] When the temperature of the molten iron in the furnace reaches 1450°C, add broken glass as a slag gathering agent to gather slag and remove slag;

[0041] According to the total amount of raw materials added in the furnace, add 0.6% of 75 ferrosilicon and 0.6% of ZL109 fragments that have been preheated to about 200°C into the ladle; when...

Embodiment 2

[0054] Add the following charge in sequence in the medium frequency induction furnace:

[0055] Pig iron 56%: containing C4.1%, Si1.6%, Mn0.24%, the balance is Fe;

[0056] Scrap steel 14%: containing C0.3%, Si0.3%, Mn0.5%, the balance is Fe;

[0057] 75 ferromanganese 7%: containing C1.6%, Si1.15%, Mn77%; Cr0.2%, the balance is Fe;

[0058] 75 ferrosilicon 1%: containing C0.1%, Si76%, Mn0.35%; Cr0.24%, the balance is Fe;

[0059] Electrolytic nickel 7%: containing more than 99.9% Ni;

[0060] Electrolytic copper 5%: containing Cu99.9% or more;

[0061] Return material 10%: containing C2.6%, Si2.8%, Ni4.5%, Mn7.0%, Cu3.0%, the balance is Fe.

[0062] When the temperature of the molten iron in the furnace reaches 1450°C, add cullet to collect slag and remove slag;

[0063] According to the total amount of raw materials added in the furnace, add 0.6% of 75 ferrosilicon and 0.6% of ZL109 fragments that have been preheated to about 200°C into the ladle; when the temperature o...

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Abstract

The present invention discloses an austenite gray cast-iron material with a weight percentage of chemical composition as follows: C 1.5-2.9 percent, Si 1.5-3.0 percent, Mn 5.0-7.5 percent, Ni 5.0-8.0 percent, Cu 3.0-6.0 percent, Al more than 0 and less than or equal to 0.3 percent, the total amount of impurity less than or equal to 0.25 percent and the remainder is Fe. The metallurgical structure of the austenite gray cast-iron material is that A-type graphite and fine carbides with a quantity of less than or equal to 4 percent are distributed on the austenite matrix. The preparing method is that an IF (intermediate frequency) induction furnace is used to melt the charge. When the temperature reaches 1500 degrees Celsius system, a casting ladle is poured in and an inoculation in the ladle is conducted by using shivers of silicoferrite 75 and ZL109. When the temperature reaches around 1450 degrees Celsius system, the pouring is conducted. The material can be used for the inlaid ring of a piston, the cost is lower than the austenite gray cast-iron of L-NiCuCr1562 and the performance is approximate or equal to the austenite gray cast-iron of L-NiCuCr1562.

Description

technical field [0001] The invention relates to an alloy material, in particular to a cast iron material for an insert ring on a piston. Background technique [0002] Piston insert ring: It is an annular circle inlaid in the first ring groove of the piston. It is generally made of austenitic gray cast iron material. Its main function is to improve the wear resistance and heat resistance of the piston ring groove, and strengthen the piston and piston. The sealing performance of the ring, thereby improving the service life of the piston and the reliability of the operation of the internal combustion engine. [0003] Austenitic gray cast iron is used as the internal combustion engine piston insert because the thermal expansion coefficient of this material is very close to that of the cast aluminum alloy (21×10 -6 / ℃), and its wear resistance, thermal conductivity, good mechanical properties and machining properties. [0004] The existing ring material generally adopts the au...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C37/10C22C33/08B22D13/00B22D37/00
Inventor 刘鹏展喻本海易绿林李世环朱达旦熊炳卫唐建萍
Owner 湖南江滨机器(集团)有限责任公司
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