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High-strength and high-tenacity steel with martensite-ferrite complex phase structure

A high-toughness steel and high-strength technology, applied in the field of steel production, can solve the problems of difficult forging, turning, grinding, shortening the service life of workpieces, consuming time and energy, etc., and achieve low cost, good processability and low equipment requirements Effect

Inactive Publication Date: 2013-12-04
由伟
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, compared with other types of microstructures such as ferrite and austenite, martensite has lower toughness and plasticity and higher brittleness. Cracks will occur, which will shorten the service life of the workpiece, increase production costs, and may even cause safety accidents in serious cases
In addition, martensitic steel has poor machinability due to its high hardness. When producing parts with this kind of steel, it is difficult to perform forging, turning, grinding and other processing, which requires more time and energy consumption.

Method used

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  • High-strength and high-tenacity steel with martensite-ferrite complex phase structure

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Example 1: Press figure 1 Shown, the chemical composition and weight percentage thereof are:

[0033] Carbon: 0.01-0.05%;

[0034] Silicon: 0.5-2.5%;

[0035] Manganese: 0.2-1.5%;

[0036] Chromium: 0.05-1.5%;

[0037] Nickel: 0.05-1.5%;

[0038] Boron: 0.001-0.8%;

[0039] the rest is iron;

[0040] The production process is:

[0041] (1) Weigh various raw materials as required;

[0042] (2) Crushing and grinding blocky raw materials;

[0043] (3) Put various raw materials into the container and mix and stir to make the ingredients uniform;

[0044] (4) Put the uniformly mixed raw materials into the smelting furnace for smelting, and the heating temperature is 1800°C;

[0045] (5) Pour molten steel into a crucible, cool to room temperature, and obtain a steel ingot;

[0046] (6) Take out the steel ingot from the crucible, then perform heat treatment process, and finally get the finished product.

[0047]

Embodiment 2

[0048] Example 2: Press figure 1 Shown, the chemical composition and weight percentage thereof are:

[0049] Carbon: 0.06-0.10%;

[0050] Silicon: 0.5-3.5%;

[0051] Boron: 0.001-0.003%;

[0052] the rest is iron;

[0053] The production process is:

[0054] (1) Weigh various raw materials as required;

[0055] (2) Crushing and grinding blocky raw materials;

[0056] (3) Put various raw materials into the container and mix and stir to make the ingredients uniform;

[0057] (4) Put the uniformly mixed raw materials into the smelting furnace for smelting, and the heating temperature is 1900°C;

[0058] (5) Pour molten steel into a crucible, cool to room temperature, and obtain a steel ingot;

[0059] (6) Take out the steel ingot from the crucible, then perform heat treatment process, and finally get the finished product.

[0060]

Embodiment 3

[0061] Embodiment 3: press figure 1 Shown, the chemical composition and weight percentage thereof are:

[0062] Carbon: 0.11-0.15%;

[0063] Silicon: 0.5-2.0%;

[0064] Manganese: 0.2-1.5%;

[0065] Boron: 0.005-0.025%;

[0066] the rest is iron;

[0067] The production process is:

[0068] (1) Weigh various raw materials as required;

[0069] (2) Crushing and grinding blocky raw materials;

[0070] (3) Put various raw materials into the container and mix and stir to make the ingredients uniform;

[0071] (4) Put the uniformly mixed raw materials into the smelting furnace for smelting, and the heating temperature is 2000°C;

[0072] (5) Pour molten steel into a crucible, cool to room temperature, and obtain a steel ingot;

[0073] (6) Take out the steel ingot from the crucible, then perform heat treatment process, and finally get the finished product.

[0074]

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Abstract

The invention belongs to the field of steel material production, and particularly relates to high-strength and high-tenacity steel with a martensite-ferrite complex phase structure. The high-strength and high-tenacity steel is characterized by comprising the following raw materials: entire or partial carbon, silicon, manganese, chromium, nickel, boron and ferrum; the production technology comprises the following steps: (1), weighing, smashing and grinding; (2), mixing and stirring; (3), smelting and cooling; (4), heat-processing. The high-strength and high-tenacity steel provided by the invention has higher strength, hardness and abrasion resistance, higher tenacity and plasticity, as well as better processability; besides, the steel production technology is simple and low in production cost, can be applied to the fields such as machinery, automobile and architecture, and has wide application prospect, so that the high-strength and high-tenacity steel has higher practicability and popularization and application value.

Description

technical field [0001] The invention belongs to the field of steel production, in particular to a high-strength and high-toughness steel with a martensite-ferrite multiphase structure. Background technique [0002] Iron and steel materials are currently the most widely used metal materials, and are widely used in many industries such as machinery, automobiles, and construction. Steel with martensitic structure has high strength, hardness and wear resistance, and is widely used in the manufacture of turning tools, milling cutters, drills and other products. [0003] However, compared with other types of microstructures such as ferrite and austenite, martensite has lower toughness and plasticity and higher brittleness. Cracks will occur, which will shorten the service life of the workpiece, increase production costs, and may even cause safety accidents in serious cases. In addition, martensitic steel has poor machinability due to its high hardness. When using this steel to ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/54
Inventor 由伟谭谆礼白秉哲
Owner 由伟