High-thermal conductivity high-abrasion resistance hot stamping die steel and preparation method thereof

A technology of hot stamping die and thermal conductivity, which is applied in the field of high thermal conductivity and high wear-resistant hot stamping die steel and its preparation, and can solve problems such as reducing thermal conductivity

Inactive Publication Date: 2013-10-02
SHANGHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

And the addition of alloying element Cr will reduce the thermal conductivity of steel

Method used

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  • High-thermal conductivity high-abrasion resistance hot stamping die steel and preparation method thereof
  • High-thermal conductivity high-abrasion resistance hot stamping die steel and preparation method thereof
  • High-thermal conductivity high-abrasion resistance hot stamping die steel and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0071] Present embodiment has produced a kind of steel, and its concrete composition is as follows:

[0072] C: 0.45%;

[0073] Si: 0.15%;

[0074] Mn: 0.12%;

[0075] W: 2.55%;

[0076] Mo: 2.6%;

[0077] Cr: 0.18%;

[0078] V: 0.67%;

[0079] The rest is Fe and unavoidable impurity elements, S: ≤0.03% in impurity elements; P: ≤0.03%;

[0080] The preparation process and heat treatment process are as follows:

[0081] (a) Smelting: After the alloy is designed according to the above composition, it is smelted according to the traditional method, and the batch material in the above formula is placed in the electric furnace and smelted at a temperature of 1530°C; then the steel ingot is poured and enters the next step for use ;

[0082] (b) Electroslag remelting: voltage 50V, current 2800A, melting speed 11mm / min, molten pool depth 50mm, electroslag ingot specification Φ120. After electroslag remelting, the content of gas and inclusions can be reduced, and a steel ingot...

Embodiment 2

[0090] Present embodiment has produced a kind of steel, and its concrete composition is as follows:

[0091] C: 0.50%;

[0092] Si: 0.08%;

[0093] Mn: 0.15%;

[0094] W: 1.8%;

[0095] Mo: 2.5%;

[0096] Cr: 0.08%;

[0097] V: 0.8%;

[0098] The rest is Fe and unavoidable impurity elements, S: ≤0.05% in impurity elements; P: ≤0.03%;

[0099] The preparation process and heat treatment process are as follows:

[0100] (a) Smelting: After the alloy is designed according to the above composition, it is smelted according to the traditional method. The batch materials in the above formula are placed in the electric furnace and smelted at a temperature above 1500°C; then the steel ingot is poured and enters the next step to be use;

[0101] (b) Electroslag remelting: The electroslag remelting process is a voltage of 50V, a current of 2800A, a melting speed of 11mm / min, a depth of molten pool of 50mm, and an electroslag ingot specification of Φ120. After electroslag remeltin...

Embodiment 3

[0109] Present embodiment has produced a kind of steel, and its concrete composition is as follows:

[0110] C: 0.48%;

[0111] Si: 0.12%;

[0112] Mn: 0.15%;

[0113] W: 1.8%;

[0114] Mo: 2.7%;

[0115] Cr: 0.18%;

[0116] V: 0.54%;

[0117] The rest is Fe and unavoidable impurity elements, S: ≤0.03% in impurity elements; P: ≤0.03%;

[0118] The preparation process and heat treatment process are as follows:

[0119] (a) Smelting: After the alloy is designed according to the above composition, it is smelted according to the traditional method. The batch materials in the above formula are placed in the electric furnace and smelted at a temperature above 1500°C; then the steel ingot is poured and enters the next step to be use;

[0120](b) Electroslag remelting: The electroslag remelting process is a voltage of 50V, a current of 2800A, a melting speed of 11mm / min, a depth of molten pool of 50mm, and an electroslag ingot specification of Φ120. After electroslag remeltin...

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Abstract

The invention relates to a novel high-thermal conductivity high-abrasion resistance hot stamping die material. The current hot stamping die steels on the market are mainly various improved high alloy steels such as H13 steel, H11 steel and the like. The steel disclosed by the invention comprises the following components in percentage by mass: 0.45-0.5% of C, less than 0.2% of Si, less than 0.20% of Mn, 1.0-2.0% of W, 2.0-3.5% of Mo, less than 0.30% of Cr and the balance of Fe and other unavoidable impurity elements, wherein the S content is less than or equal to 0.03% and the P content is less than or equal to 0.03% in the impurity elements. The steel has the characteristics that simple C, Mo and W elements are taken as the main components and the proportion of carbide is coordinated; low Mn content, low Cr content and super low Si content are kept; the material has good machinability after being subjected to electric-furnace smelting, electroslag remelting, annealing, high-temperature homogenizing, forging and annealing; after being subjected to heat treatment (quenching at the temperature of 1060-1100 DEG C and repeatedly high-temperature tempering), the steel has the toughness of general hot stamping die steels such as H13 steel and is better in hardness, tempering stability and thermal fatigue property; and the steel is more suitable for hot stamping due to the advantages of lower thermal expansion coefficient, high thermal conduction ability and high abrasion resistance particularly.

Description

technical field [0001] The invention relates to a steel with high thermal conductivity and high wear resistance for hot stamping dies and a preparation method thereof. Background technique [0002] With the rapid development of the automobile industry and the demand for lightweight automobiles, the demand for ultra-high-strength stamping parts is increasing. The cold stamping forming process requires a lot of pressure to obtain ultra-high-strength steel, which easily reduces the service life of the mold, and is also prone to problems such as cracking, wrinkling, and poor dimensional accuracy. The hot stamping forming process utilizes the plasticity and ductility of the metal at high temperature to increase and the yield strength to decrease, so it is widely used. [0003] The steel plate hot stamping process is to heat a special high-strength steel plate to the austenitic temperature range, quickly move to the mold, and quickly stamp it. The parts are quenched and cooled t...

Claims

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Application Information

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IPC IPC(8): C22C38/12C22C33/04C21D8/00
Inventor 吴晓春李爽曹齐魏敏
Owner SHANGHAI UNIV
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