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Manufacturing process of hot work die steel for high performance die-casting die

A technology of hot work die steel and manufacturing process, which is applied in the field of die steel, can solve the problems of poor surface hardness and core hardness, high production cost, complex and cumbersome heat treatment process, etc., achieve strength and toughness improvement, and prevent intragranular segregation , the effect of uniform refinement of tissue

Inactive Publication Date: 2020-04-24
宁波海琰伟业金属制品有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the carburizing, carbonitriding and combined heat treatment process is complex and cumbersome, and the production cost is relatively high. At the same time, its surface hardness and core hardness are not excellent. Therefore, the manufacturing technology of mold steel can be further studied to obtain a simple production process. Hot work die steel with better performance

Method used

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  • Manufacturing process of hot work die steel for high performance die-casting die

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] A hot work die steel for a die-casting mold, which consists of the following components by weight percentage:

[0034] C: 0.36%, Si: 2.2%, Mn: 0.35%, Mo: 2.1%, W: 3%, Nb: 0.19%, Cr: 3.6%, Sr: 0.29%, Ti: 0.22%, Ce: 0.06%, S≤0.003%, P≤0.03%, and the balance is Fe.

[0035] A manufacturing process for hot work die steel for high-performance die-casting molds, comprising the following steps:

[0036] (1) Smelting: batching is carried out according to the composition ratio of hot work die steel, smelted in a vacuum induction furnace, and cast to obtain a steel ingot, wherein the melting temperature is 1580°C, and the pouring temperature is 1480°C; then the steel ingot is electroslag remelted to obtain Electroslag steel ingot;

[0037] (2) High-temperature homogenization treatment: heat the electroslag steel ingot obtained in step (1) to 1270°C, keep it warm for 9 hours, and then air-cool to room temperature;

[0038] (3) Forging: Multi-directional forging is carried out o...

Embodiment 2

[0044] A hot work die steel for a die-casting mold, which consists of the following components by weight percentage:

[0045] C: 0.42%, Si: 1.8%, Mn: 0.4%, Mo: 1.8%, W: 3.5%, Nb: 0.23%, Cr: 2.8-3.7%, Sr: 0.46%, Ti: 0.28%, Ce: 0.09 %, S≤0.003%, P≤0.03%, and the balance is Fe.

[0046] A manufacturing process for hot work die steel for high-performance die-casting molds, comprising the following steps:

[0047] (1) Smelting: batching is carried out according to the composition ratio of hot work die steel, and the steel ingot is melted by vacuum induction furnace, and the melting temperature is 1610°C, and the pouring temperature is 1470°C; the steel ingot is then electroslag remelted to obtain Electroslag steel ingot;

[0048] (2) High-temperature homogenization treatment: heat the electroslag steel ingot obtained in step (1) to 1270°C, keep it warm for 10 hours, and then air-cool to room temperature;

[0049] (3) Forging: Multi-directional forging is carried out on the steel...

Embodiment 3

[0055] A hot work die steel for die-casting molds, consisting of the following components in weight percentage: C: 0.46%, Si: 1.8%, Mn: 0.35%, Mo: 2.3%, W: 2.6%, Nb: 0.16%, Cr: 3.2%, Sr: 0.21%, Ti: 0.31%, Ce: 0.07%, S≤0.003%, P≤0.03%, and the balance is Fe.

[0056] A manufacturing process for hot work die steel for high-performance die-casting molds, comprising the following steps:

[0057] (1) Smelting: batching is carried out according to the composition ratio of the hot work die steel, and the steel ingot is melted by vacuum induction furnace, and the melting temperature is 1610°C, and the pouring temperature is 1480°C; Electroslag steel ingot;

[0058] (2) High-temperature homogenization treatment: heat the electroslag steel ingot obtained in step (1) to 1290°C, keep it warm for 8 hours, and then air-cool to room temperature;

[0059] (3) Forging: Multi-directional forging is carried out on the steel ingot obtained through step (2). The starting forging temperature is 1...

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Abstract

The invention provides a manufacturing process of hot work die steel for a high performance die-casting die and relates to the technical field of die steel. The manufacturing process of the hot work die steel comprises the following steps of (1) smelting; (2) high-temperature homogenization treatment; (3) forging; (4) annealing treatment; (5) quenching and tempering treatment; (6) nitriding treatment; and (7) tempering treatment. The hot work die steel is prepared from the following components in percent by weight: 0.33-0.46% of C, 1.5-2.3% of Si, 0.32-0.45% of Mn, 1.6-2.3% of Mo, 2.6-3.6% ofW, 0.16-0.27% of Nb, 2.8-3.7% of Cr, 0.21-0.53% of Sr, 0.16-0.31% of Ti, 0.05-0.09% of Ce, less than or equal to 0.003% of S, less than or equal to 0.03% of P and the balance Fe. The hot work die steel prepared by the manufacturing process has relatively high surface hardness and wear resistance, relatively good impact toughness and excellent fatigue resistance and strength, so that the service life of the hot work die steel for the die-casting die is prolonged effectively.

Description

technical field [0001] The invention relates to the technical field of die steel, in particular to a manufacturing process of hot-working die steel for high-performance die-casting dies. Background technique [0002] Hot work die steel is a very important steel type in the die industry. It is mainly used to press metals above the recrystallization temperature into workpieces, generally including hot extrusion dies, hot forging dies, die-casting dies and isothermal forging dies. Compared with cold work dies, the surface of hot work die steel is subject to high-intensity alternating stress and repeated contact with high-temperature materials. Under such a harsh working environment, the service life of the die is generally shorter, and the surface of the steel body It is prone to cracking, plastic deformation and wear, etc., and eventually makes the hot work die invalid. [0003] Hot work die steel for die-casting molds is mainly used to manufacture mold materials for metal or...

Claims

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Application Information

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IPC IPC(8): C22C33/04C22C38/04C22C38/22C22C38/26C22C38/28C23C8/26C21D9/00
CPCC21D9/0068C22C33/04C22C38/002C22C38/005C22C38/04C22C38/22C22C38/26C22C38/28C23C8/26
Inventor 郑西
Owner 宁波海琰伟业金属制品有限公司
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