Unlock instant, AI-driven research and patent intelligence for your innovation.

A secondary pouring material for an aluminum piston combustion chamber and its manufacturing method

A secondary pouring and combustion chamber technology, applied in the field of piston manufacturing, can solve the problems of deteriorated material casting performance, poor thermal fatigue resistance, unfavorable piston feeding, etc., to achieve improved heat resistance, improved piston life, and reduced oil consumption Effect

Active Publication Date: 2018-07-20
BINZHOU BOHAI PISTON CO LTD
View PDF6 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Most manufacturers increase the content of nickel, copper and other elements in the alloy in order to facilitate mass production and improve performance, but because the piston is integral, the increase of nickel, copper and other elements deteriorates the casting performance of the material , which is extremely unfavorable to the piston forming, and is also not conducive to the feeding of the piston during the casting process. At the same time, the increase of elements such as nickel and copper does not improve the normal temperature performance of the piston, or even declines to a certain extent. Therefore, how to balance the requirements of various parts of the piston , especially important
[0003] To sum up, in the prior art, there is still a lack of a simple, effective and low-cost solution to the problem of poor thermal fatigue resistance of the piston combustion chamber.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • A secondary pouring material for an aluminum piston combustion chamber and its manufacturing method
  • A secondary pouring material for an aluminum piston combustion chamber and its manufacturing method
  • A secondary pouring material for an aluminum piston combustion chamber and its manufacturing method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] The method for manufacturing an aluminum piston by secondary pouring material comprises the following steps:

[0043]Step 1: In the casting process, on the basis of the original holding furnace, add an induction stirring holding furnace for secondary pouring. The composition of the secondary pouring material is 3.5% nickel, 4% copper, 0.4% Iron, 5% silicon, 0.1% magnesium, 0.05% titanium, 0.0002% boron, 0.05% manganese, 0.05% zirconium, 0.05% vanadium, except for impurity elements, the balance is aluminum. The aluminum liquid temperature control range is 800 ℃.

[0044] Step 2: Use pouring spoon 1 to scoop up and weigh the aluminum liquid with normal composition with an electronic balance, and then pour the aluminum liquid from the gate in a conventional way, such as figure 1 shown.

[0045] Step 3: In the self-induction stirring and holding furnace, use a small pouring spoon 4 to scoop up the aluminum liquid with high alloy content, use the metal funnel 5 to pour it ...

Embodiment 2

[0048] The method for manufacturing an aluminum piston by secondary pouring material comprises the following steps:

[0049] Step 1: In the casting process, on the basis of the original holding furnace, add an induction stirring holding furnace for secondary pouring. The secondary pouring material contains 4% nickel, 5% copper, 0.6% iron, 7% silicon, 0.2% magnesium, 0.08% titanium, 0.00025% boron, 0.08% manganese, 0.08% zirconium, 0.09% vanadium, and the balance is aluminum except impurity elements. The temperature control range of the molten aluminum is 810°C.

[0050] Step 2: Use pouring spoon 1 to scoop up and weigh the aluminum liquid with normal composition with an electronic balance, and then pour the aluminum liquid from the gate in a conventional way, such as figure 1 shown.

[0051] Step 3: In the self-induction stirring and holding furnace, use a small pouring spoon 4 to scoop up the aluminum liquid with high alloy content, use the metal funnel 5 to pour it from th...

Embodiment 3

[0054] The method for manufacturing an aluminum piston by secondary pouring material comprises the following steps:

[0055] Step 1: In the casting process, on the basis of the original holding furnace, add an induction stirring holding furnace for secondary pouring. The secondary pouring material contains 5% nickel, 6% copper, 0.7% iron, 8% silicon, 0.4% magnesium, 0.12% titanium, 0.00025% boron, 0.12% manganese, 0.11% zirconium, 0.10% vanadium, and the balance is aluminum except impurity elements. The temperature control range of the molten aluminum is 815°C.

[0056] Step 2: Use pouring spoon 1 to scoop up and weigh the aluminum liquid with normal composition with an electronic balance, and then pour the aluminum liquid from the gate in a conventional way, such as figure 1 shown.

[0057] Step 3: In the self-induction stirring and holding furnace, use a small pouring spoon 4 to scoop up the aluminum liquid with high alloy content, use the metal funnel 5 to pour it from th...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses a secondary pouring material and a manufacturing method for an aluminum piston combustion chamber, which aims to solve the problem in the prior art that the thermal fatigue resistance of the piston combustion chamber is poor, and the combustion chamber area is due to the presence of heat-resistant metal elements. Enrichment, combined with the rapid cooling of the combustion chamber, the heat-resistant metal alloy phase is fine and fully dispersed, so that the heat resistance of the aluminum alloy in the combustion chamber area is doubled. Overcasting material consisting of the following components: Nickel 3‑15%, Copper 4‑15%, Iron 0.4‑6%, Silicon 5‑15%, Magnesium 0‑0.8%, Titanium 0.05‑5%, Boron 0.0002‑ 2.5%, manganese 0-0.5%, zirconium 0-0.2%, vanadium 0.1-0.2%, scandium 0-0.5%, the balance is aluminum and unavoidable impurities, wherein % is mass percentage.

Description

technical field [0001] The invention belongs to the field of piston manufacturing, and in particular relates to a secondary casting material and a manufacturing method of an aluminum piston. Specifically, in the casting process, the composition of the combustion chamber is changed by the method of secondary pouring, the content of heat-resistant elements in this part is increased, and the content of other elements is adjusted and optimized to achieve the purpose of strengthening the combustion chamber. technical background [0002] At present, with the increasingly stringent emission requirements, commercial vehicle engines are developing in the direction of high power and high load, and the degree of strengthening continues to increase. Higher requirements are placed on the performance of the piston, especially the fatigue strength of the piston combustion chamber. In response to this requirement, some engine pistons are made of forged steel, but this material is difficult...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): C22C21/14C22C21/16C22C21/02C22C21/00B22D19/16
CPCB22D19/16C22C21/00C22C21/02C22C21/14C22C21/16
Inventor 刘世英冯增建李艳军崔岩寿李佳张慧玲
Owner BINZHOU BOHAI PISTON CO LTD