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A zirconium-cerium alloy gray iron casting

A technology of cast iron and gray cast iron, which is applied in the field of zirconium-cerium alloy gray iron casts, can solve the problems of gray iron casts such as easy fracture, and achieve high tensile/flexural strength, small aspect ratio of edge passivation, and good processability Effect

Active Publication Date: 2022-05-24
苏州勤堡精密机械有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The main purpose of the present invention is to provide a zirconium-cerium alloy gray iron casting, which can greatly improve the strength and processing performance of thin-walled gray iron castings, and solve the problem that gray iron castings are easy to break under high-temperature and high-torque working environments

Method used

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  • A zirconium-cerium alloy gray iron casting

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Embodiment 1

[0037] This embodiment is a zirconium-cerium alloy gray iron casting, which is composed of the following components by weight: 3.45% carbon, 2.0% silicon, 0.8% manganese, 0.06% phosphorus, 0.12% sulfur, and 0.8% copper , tin is 0.06%, chromium is 0.25%, zirconium is 0.05%, cerium is 0.06%, and the balance is iron and inevitable impurities associated with casting. Its production process includes the following steps:

[0038] Step 1) Ingredients: 10% pig iron, 40% thick plate scrap (≥10mm), 50% return charge, medium nitrogen calcined coke recarburizer (N content ≤6000ppm, particle size 1-5mm) 1.2%, ferrosilicon 1.5%, 1% ferromanganese, 0.15% iron sulfide, 0.8% copper, 0.06% tin, 0.3% ferrochromium, 0.5% ferrozirconium;

[0039] Step 2) Feeding and melting: first add 8% pig iron to the bottom of the electric furnace, add 20% scrap steel and 0.6% recarburizer, then add 20% return charge, after the electric furnace is full, start the melting by power transmission at maximum power,...

Embodiment 2

[0048] This embodiment is a zirconium-cerium alloy gray iron casting, which is composed of the following components by weight percentage: carbon is 3.30%, silicon is 2.2%, manganese is 0.7%, phosphorus is 0.1%, sulfur is 0.08%, and copper is 0.6% , tin is 0.04%, chromium is 0.15%, zirconium is 0.03%, cerium is 0.03%, and the balance is iron and inevitable impurities associated with casting. Its production process includes the following steps:

[0049] Step 1) Ingredients: 10% pig iron, 40% thick plate scrap (≥10mm), 50% return charge, medium nitrogen calcined coke recarburizer (N content≤6000ppm particle size 1-5mm) 1.1%, ferrosilicon 1.5%, manganese Iron 1%, iron sulfide 0.15%, copper 0.6%, tin 0.04%, ferrochromium 0.2%, iron zirconium 0.3%;

[0050] Step 2) Feed melting: first add 10% pig iron to the bottom of the electric furnace, add 20% scrap steel and 0.6% recarburizer, then add 20% return charge, and start the maximum power transmission and melting after filling the el...

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Abstract

The invention discloses a zirconium-cerium alloy gray iron casting, which is composed of the following components by weight percentage: carbon 3.30%-3.45%, silicon 2.0%-2.2%, manganese 0.7%-0.8%, phosphorus 0.06%-0.1%, sulfur 0.08-0.12%, copper 0.6-0.8%, tin 0.04-0.06%, chromium 0.15-0.25%, zirconium 0.03-0.05%, cerium 0.03%-0.06%, and the balance is iron and casting associated inevitable impurities. The invention can greatly improve the strength and processing performance of thin-walled gray iron castings, and solve the problem that the gray iron castings are easy to break under high-temperature and high-torque working environments.

Description

【Technical field】 [0001] The invention belongs to the technical field of castings, in particular to a zirconium-cerium alloy gray iron casting. 【Background technique】 [0002] In the traditional casting industry, gray iron castings have low tensile strength (Max 350Mpa) due to the effect of flake graphite on matrix splitting, so gray iron castings are usually used for mechanical matrix (such as bed, base, shell parts, etc.), such parts volume wall The thickness is relatively large, and the requirements for product strength are not high. With the rapid development of industrialization, gray iron castings have been widely used in the fields of engine cylinder blocks, cylinder heads, clutches and other parts of the automobile industry due to their good wear resistance and heat dissipation characteristics. The product development direction is multi-functional, high-efficiency and energy-saving, and the product structure requirements are lightweight, thin-walled, and miniaturize...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C37/10C22C37/06C22C33/08C21C1/08B22D1/00B22D43/00B22C9/02
CPCC22C37/10C22C37/06C22C33/08C21C1/08B22D1/00B22D43/005B22C9/02C21D2211/009Y02P10/20
Inventor 李永刚
Owner 苏州勤堡精密机械有限公司
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