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D-type graphite cast iron bar and preparation method thereof

A technology of graphite cast iron and profiles, applied in the field of D-type graphite cast iron profiles and their preparation, to achieve the effects of reduced splitting effect, easy processing and uniform organization

Inactive Publication Date: 2019-02-15
HANDAN HENGGONG METALLURGICAL MACHINERY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The object of the present invention is to provide a D-type graphite cast iron profile and its preparation method, which solves the problem of being able to obtain a D-type graphite cast iron profile, which has high heat resistance, oxidation resistance, fatigue resistance, uniform Advantages of high degree

Method used

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  • D-type graphite cast iron bar and preparation method thereof
  • D-type graphite cast iron bar and preparation method thereof
  • D-type graphite cast iron bar and preparation method thereof

Examples

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Embodiment 1

[0034] Embodiment 1: A kind of D-type graphite cast iron profile, selects HT250 material HT250 material The mass percentages of carbon, silicon, manganese, and titanium elements in the profile are:

[0035] Carbon: 3.45%;

[0036] Silicon: 2.55%;

[0037] Manganese: 0.55%;

[0038] Phosphorus: 0.075%;

[0039] Sulfur: 0.046%;

[0040] Titanium: 0.25%;

[0041] The rest is iron.

[0042] HT250 material The profile preparation method specifically comprises the following steps:

[0043] The cross-section of this profile is small, and the liquid center hardly exists outside the drawing exit. Before production, the traction head is strictly made according to the size of the production profile, and the rough manufacture of the traction head, or the gap between the graphite sleeve and the graphite sleeve is too large or too small. If it is too small, it will not be able to vent, and if it is too large, it will easily leak molten iron, which will easily cause production fa...

Embodiment 2-3

[0051] Embodiment 2-3: a kind of D-type graphite cast iron profile, wherein the mass fraction of carbon is inconsistent with that of Example 1, and the mass fractions of other components are the same as in Example 1, and the corresponding components of a D-type graphite cast iron profile The quality scores are shown in Table 1.

Embodiment 4-5

[0052] Embodiment 4-5: A kind of D-type graphite cast iron profile, wherein the mass fraction of silicon is inconsistent with that in Example 1, and the mass fractions of other components are the same as in Example 1, and the corresponding components of a D-type graphite cast iron profile The quality scores are shown in Table 2.

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Abstract

The invention discloses a D-type graphite cast iron bar. The D-type graphite cast iron bar comprises, by mass, 3.4-3.5% of carbon, 2.5-2.6% of silicon, 0.5-0.6% of manganese, no more than 0.050% of sulfur, no more than 0.15% of phosphorus, 0.15-0.35% of titanium, and the balance iron. According to a preparation method of the D-type graphite cast iron bar, a proper amount of titanium alloy is added, so that the graphite in base iron liquid is refined to a certain extent in advance, the intensity much higher than that of A-type graphite is achieved without need of a large proportion of pearlite,the structure is uniform and compact, and machining is easy.

Description

technical field [0001] The invention relates to the technical field of cast iron materials and casting metallurgy, in particular to a D-type graphite cast iron profile and a preparation method thereof. Background technique [0002] Cast iron is the most widely used metal material in the industry, and has been widely used in aviation, aerospace, automobiles, machinery, manufacturing, and ships. [0003] Horizontal continuous casting D-type graphite cast iron is an excellent new material that is more resistant to oxidation, growth and thermal fatigue than A-type graphite cast iron. [0004] The horizontal continuous casting D-type graphite cast iron weakens the splitting effect on the matrix because the graphite is fine and curled. Compared with the A-type graphite, the structure is more uniform, the density is higher, the strength is high, the wear resistance is good, and the processing and cutting performance is good. Especially after broaching, it has high brightness and e...

Claims

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Application Information

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IPC IPC(8): C22C37/10C22C33/08B22D11/045
CPCB22D11/045C22C33/08C22C37/10
Inventor 魏志勇王敬民
Owner HANDAN HENGGONG METALLURGICAL MACHINERY CO LTD
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