Inoculator for large-diameter cylinder jacket

An inoculant and cylinder liner technology, applied in the field of cast iron inoculants, can solve the problems of unsatisfactory technical requirements and high material requirements, achieve the effect of improving the shape of inclusions and solving the effect of inoculation recession

Inactive Publication Date: 2014-04-16
HUDONG HEAVY MACHINERY +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002]Large-bore cylinder liner is a thick and large-section casting. The thickness of the test part is 180-245mm, and the material requirements are high. Tensile strength ≥ 245MPa, elongation ≥ 0.3%, hardness 180-230HB; Wartsila's requirements for the mechanical properties of the cylinder liner body are: tensile strength ≥ 210MPa, elongation ≥ 0.3%, hardness 180-230HB; currently used silicon Silicon-based calcium inoculants (about 14% calcium content) and silicon-based calcium-barium inoculants (about 4% barium content and about 5% calcium content) cannot meet the technical requirements

Method used

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  • Inoculator for large-diameter cylinder jacket
  • Inoculator for large-diameter cylinder jacket
  • Inoculator for large-diameter cylinder jacket

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0016] Below we further illustrate the present invention in conjunction with the accompanying drawings and embodiments, but the protection scope of the present invention cannot be limited by this.

[0017] An inoculant used for large-bore cylinder liners is composed of raw materials in the following mass percentages: Si52-58%; Re7-8%; Ca8-10%; Ba7-8%; Al1-1.5%; the rest is Fe.

[0018] The mass percent of the raw material component that embodiment 1-5 adopts is shown in Table 1:

[0019]

Si%

Re%

Ca%

Ba%

Al%

Fe%

Example 1

52

8

10

7

1

22

Example 2

58

7

8

8

1.5

17.5

Example 3

55

8

9

8

1.2

18.8

[0020] Example 4

56

7.5

8

7

1

20.5

Example 5

57

8

9

8

1

17

[0021] The manufacture method of inoculant of the present invention is as follows:

[0022] For the smelting method, in the...

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Abstract

The invention discloses an inoculator for a large-diameter cylinder jacket, which is prepared from the following raw materials in percentage by mass: 52-58% of Si, 7-8% of Re, 8-10% of Ca, 7-8% of Ba, 1-1.5% of Al and the balance of Fe. The inoculator has the characteristics of high efficiency and long acting; by using the inoculator, the tensile strength of the cylinder jacket body is greater than or equal to 250 MPa, the elongation percentage is greater than or equal to 0.4%, and the hardness is 180-230HB; and meanwhile, the cylinder jacket body can satisfy the technical requirements of customers for cylinder jackets.

Description

technical field [0001] The invention relates to an inoculant for cast iron, in particular to an inoculant for a cylinder liner with a large bore. Background technique [0002] The large-bore cylinder liner is a thick and large-section casting. The thickness of the test part is 180-245mm, and the material requirements are high. B&W's requirements for the mechanical properties of the cylinder liner body are: tensile strength ≥ 245MPa, elongation ≥ 0.3%, hardness 180-230HB ; Wartsila's requirements for the mechanical properties of the cylinder liner body are: tensile strength ≥ 210MPa, elongation ≥ 0.3%, hardness 180-230HB; currently used silicon-based calcium calcium inoculants (about 14% calcium), silicon The calcium-based barium inoculant (containing about 4% barium and about 5% calcium) cannot meet the technical requirements. In order to achieve the mechanical performance index, the inoculant is required to be both efficient and long-acting. Contents of the invention ...

Claims

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Application Information

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IPC IPC(8): C22C33/08C21C1/08
Inventor 高永建陶卫生张兴悦江敏
Owner HUDONG HEAVY MACHINERY
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