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Hot-work die steel for aluminum die-casting mould

A hot work die steel and aluminum die-casting technology, applied in the field of iron and steel metallurgy technology, can solve the problems of increased thermal stress and cracks in water-cooled holes, and achieve the effects of suppressing cracks, optimizing design, and suppressing hot cracking

Inactive Publication Date: 2013-11-27
柳州福臻车体实业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this case, the following problems arise: the thermal stress generated on the surface of the water-cooling hole increases when the aluminum product is cast, and cracks occur from the water-cooling hole.
However, no material satisfying this property has been proposed

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] A hot work die steel, which is composed of the following components in percentage (weight): C 0.30%, Si 1.20%, Mn 1.50%, Cr 5.50%, W 1.60%, Mo 0.30%, V 1.60 %, Ni 1.60%, Co 0.2%, Nb 0.7%, S≤0.005%, P≤0.03%, and the balance is Fe.

Embodiment 2

[0032] A hot work die steel, which is composed of the following components in percentage (weight): C 0.50%, Si 0.80%, Mn 1.70%, Cr 4.50%, W 2.00%, Mo 0.10%, V 1.80 %, Ni 1.20%, Co 0.4%, Nb 0.5%, S≤0.005%, P≤0.03%, and the balance is Fe.

Embodiment 3

[0034] A hot work die steel, the hot work die steel consists of the following components in percentage (weight): C 0.35%, Si 1.10%, Mn 1.55%, Cr 5.20%, W 1.70%, Mo 0.25%, V 1.65 %, Ni 1.50%, Co 0.25%, Nb 0.65%, S≤0.005%, P≤0.03%, and the balance is Fe.

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PUM

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Abstract

The invention discloses a hot-work die steel. The hot-work die steel consists of the following components in percentage by weight: 0.30 to 0.50 percent of C, 0.80 to 1.20 percent of Si, 1.50 to 1.70 percent of Mn, 4.50 to 5.50 percent of Cr, 1.60 to 2.00 percent of W, 0.10 to 0.30 percent of Mo, 1.60 to 1.80 percent of V, 1.20 to 1.60 percent of Ni, 0.2 to 0.4 percent of Co, 0.5 to 0.7 percent of Nb, less than or equal to 0.05 percent of S, less than or equal to 0.03 percent of P and the balance of Fe.

Description

technical field [0001] The invention relates to iron and steel metallurgical technology, in particular to a hot work die steel. Background technique [0002] As an aluminum die-casting die, there has been a problem that cracks (hot cracks) are generated on the surface of the cavity due to thermal fatigue. This thermal cracking refers to the following phenomenon: when cooling water is poured on the surface of the cavity after the mold is opened, tensile stress is generated on the surface of the cavity due to the temperature difference between the rapid cooling of the surface of the cavity and the inside of the heated state. Cracks are generated on the surface of the cavity due to thermal fatigue caused by this repeated process. For this hot tear, it is advantageous to increase the hardness of the mold. [0003] On the other hand, in recent years, there has been a demand for shortening the production cycle (higher cycle rate) of aluminum die-casting products. In order to re...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C38/58
Inventor 刘仕爽
Owner 柳州福臻车体实业有限公司
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