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H13 matrix steel and preparation method thereof

A base steel and base technology, applied in the field of material processing, can solve the problems of poor thermal stability, poor fatigue resistance, low strength and toughness, etc., and achieve the effects of improving thermal stability, prolonging mold life, and improving solid solution strengthening.

Active Publication Date: 2020-08-18
ADVANCED MFG TECH CENT CHINA ACAD OF MASCH SCI & TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In view of the above analysis, the embodiment of the present invention aims to provide an H13 matrix steel and its preparation method to solve the problems of low strength and toughness, poor thermal stability and poor fatigue resistance of the existing H13 matrix steel

Method used

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  • H13 matrix steel and preparation method thereof
  • H13 matrix steel and preparation method thereof
  • H13 matrix steel and preparation method thereof

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preparation example Construction

[0059] In another aspect, the present invention provides a method for preparing H13 matrix steel, comprising the steps of:

[0060] Step 1: According to the composition of each element of the H13 matrix steel, the raw materials are prepared, and the steel ingot is obtained by smelting in a vacuum furnace;

[0061] Step 2: Free forging of the steel ingot;

[0062] The steel ingot forging process is carried out at 1180°C to 1200°C, and the final forging temperature is ≥850°C. Steel ingot free forging adopts three-way forging process for forging. Among them, the three-way forging process is: (1) length and width of steel ingot interchangeable; (2) Z-direction upsetting of steel ingot; (3) X-direction upsetting of steel ingot; (4) Y-direction upsetting of steel ingot; (5) rounding of steel ingot Formed into round rods of specified specifications. Among them, the steel ingot is first forged into a square shape, and then forged by a three-way forging process, the X and Y directio...

Embodiment 1

[0070] The chemical composition and mass percentage of H13 matrix steel 2# are: C: 0.37%; Si: 1.5%; Mn: 0.56%; Cr: 3.1%; Mo: 3.00%; V: 1.00%; Al: 0.001%; ​​N : 0.004%.

[0071] The preparation method of H13 matrix steel 2#, comprises the steps:

[0072] Step 1: According to the composition of each element of the H13 matrix steel, the raw materials are prepared, and the steel ingot is obtained by smelting in a vacuum furnace;

[0073]Step 2: The steel ingot is free forged; the heating temperature of the steel ingot forging is 1180°C, and the final forging temperature is 870°C. First, the steel ingot is forged into a square shape, and forged by a three-way forging process. The three-way forging process is: (1) the length and width of the steel ingot are exchanged; (2) the Z-direction upsetting of the steel ingot; (3) the X-direction upsetting of the steel ingot; (4) the Y-direction upsetting of the steel ingot; (5) the rounding of the steel ingot round stick.

[0074] Step 3...

Embodiment 2

[0077] The chemical composition and mass percentage of H13 matrix steel 3# are: C: 0.37%; Si: 1.0%; Mn: 0.56%; Cr: 3.1%; Mo: 3.00%; V: 1.00%; Al: 0.01%; N : 0.02%.

[0078] The preparation method of H13 matrix steel 3#, comprises the steps:

[0079] Step 1: According to the composition of each element of the H13 matrix steel, the raw materials are prepared, and the steel ingot is obtained by smelting in a vacuum furnace;

[0080] Step 2: The steel ingot is free forged after annealing; the heating temperature of the steel ingot forging is 1200°C, and the final forging temperature is 900°C. First, the steel ingot is forged into a square shape, and forged by a three-way forging process. The three-way forging process is: (1) the length and width of the steel ingot are interchanged; (2) the steel ingot is upset in the Z direction; (3) the steel ingot is upset in the X direction; (4) the steel ingot is upset in the Y direction; (5) the steel ingot is rounded into A round bar with...

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Abstract

The invention relates to H13 matrix steel and a preparation method thereof, belongs to the technical field of material processing, and solves the problems of low strength and toughness, poor thermal stability and poor fatigue resistance of existing H13 steel. The H13 matrix steel comprises the following chemical components of, in percentage by mass, 0.30%-0.45% of C, 1.0%-2.0% of Si, 0.50%-1.0% ofMn, 3.0%-4.0% of Cr, 2.5%-3.5% of Mo, 0.7%-1.2% of V, 0.001%-0.05% of Al, 0.004%-0.03% of N, and the balance iron element. The preparation method of the H13 matrix steel comprises the following stepsthat 1, raw materials are prepared according to the composition of each element of the H13 matrix steel, and smelting is carried out in a vacuum furnace to obtain a steel ingot; 2, the steel ingot issubjected to free forging; 3, after free forging is conducted, isothermal spheroidizing annealing is conducted on a round bar; and 4, after spheroidizing annealing, the round bar is subjected to heattreatment, and a product with the specified size is obtained through machining. According to the preparation method, the strength and toughness, the thermal stability and the fatigue resistance of the H13 matrix steel are improved.

Description

technical field [0001] The invention relates to the technical field of material processing, in particular to an H13 matrix steel and a preparation method thereof. Background technique [0002] Hot working dies play a very important role in the field of machinery manufacturing, and the production of each hot formed part requires the matching of several forming dies. At present, the service life of domestic hot work molds is far from that of foreign developed countries, only 1 / 3 to 1 / 5 of the service life of foreign molds, which greatly reduces the production efficiency of products and increases manufacturing costs. Therefore, it is an urgent problem to improve the quality of domestic hot work molds and prolong their service life. [0003] H13 steel belongs to hot work die steel. It is a steel grade formed by adding alloy elements on the basis of carbon steel. The standard GB / T1299-2014 is implemented. The supply of high-quality H13 steel is in short supply in the market. The...

Claims

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Application Information

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IPC IPC(8): C22C38/02C22C38/04C22C38/06C22C38/22C22C38/24C22C38/34C21D9/00C21D8/06C21D1/32C21D1/18
CPCC21D1/18C21D1/32C21D8/065C21D9/0075C22C38/001C22C38/02C22C38/04C22C38/06C22C38/22C22C38/24C22C38/34
Inventor 陈蕴博马祖斌赵昌德左玲立葛学元刘恒三祁晔思
Owner ADVANCED MFG TECH CENT CHINA ACAD OF MASCH SCI & TECH
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