High strength and ductility alloy steel and heat treatment technology thereof
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A high-strength plastic product and alloy steel technology, applied in the field of high-alloy steel, can solve problems such as unclear relationships
Inactive Publication Date: 2009-03-11
INST OF SOLID PHYSICS ACAD SINICA
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However, the optimal composition and properties of materials reported in the literature are quite different, and the relationship between material structure and mechanical properties is still unclear, especially the key heat treatment process that determines the material structure and mechanical properties has not been reported yet.
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example 1
[0026] 1. Chemical composition and heat treatment process of high strength and high elongation TWIP steel
[0027] 1.1 Chemical composition
[0028] C: 0.03~0.05%, Mn:: 30±0.5%, Al: 3±0.5%, Si 3±0.5%, and the rest is Fe.
[0029] 1.2 Heat treatment process
[0030] Process system such as figure 1 As shown, the specific requirements are as follows:
[0031] (1) Place the workpiece in a resistance heating furnace (with or without atmosphere protection), and an appropriate gap should be left between the workpieces;
[0033] (3) Start heat preservation when the temperature rises to 1100°C, at this time, the temperature jump is ≤±5°C, and the heat preservation time is 2 to 5 hours (depending on the size of the workpiece);
[0034] (4) After the heat preservation is over, take the workpiece out of the resistance heating furnace, quickly put it into the water pool (water temperature ≤ 30°C) and swing it;
[0035] (5)...
example 2
[0039] 2. Chemical composition and heat treatment process of high elongation and high strength TWIP steel
[0040] 2.1 Chemical composition
[0041] C: 0.001~0.003%, Mn:: 25±0.5%, Al: 3±0.5%, Si 3±0.5%, and the rest is Fe.
[0042] 2.2 Heat treatment process
[0043] Process system such as image 3 As shown, the specific requirements are as follows.
[0044] (1) Place the workpiece in a resistance heating furnace (with or without atmosphere protection), and an appropriate gap should be left between the workpieces;
[0046] (3) When the temperature rises to 1050°C, heat preservation starts. At this time, the temperature jump is ≤±5°C, and the heat preservation time is 2 to 6 hours (depending on the size of the workpiece);
[0047] (4) Cut off the power supply after the heat preservation is over, and keep the workpiece in the furnace to cool with the furnace;
[0048] (5) When the furnace temperature is less tha...
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Abstract
The invention discloses a high product of strength and ductility alloy steel and the thermal processing process of the same. The chemical compositions in percentage by weight of the steel are: 0.03 to 0.05 percent of carbon, thirty minus and plus 0.5 percent of manganese, three minus and plus 0.5 percent of aluminum, three minus and plus 0.5 percent of silicon and the balance being Fe. The process comprises the following of: a step of arranging work pieces in a resistance heating oven with appropriate clearance between work pieces; a step of powering up and heating with the speed rate of temperature rise of 6 to 9 DEG C per minute; a step of preserving temperature when the temperature reaches 11000 DEG C, the temperature fluctuation is less than or equal to minus and plus 5 DEG C and the preservation time is 2 to five hours according to the size of the work piece; after temperature preservation is completed, taking the work pieces out of the resistance heating oven and throwing the work pieces into a water pond with the water temperature less than or equal to 30 DEG C and swinging; when the surfaces of the work pieces have no obvious steam, the work pieces an be taken out of the water pond. The high product of strength and ductility alloy steel and the thermal processing technology, can regulate and control the steel microstructure and property of high product of strength and ductility TWIP steel and can regulate and control the strength and ductility of materials according to the application conditions at a higher level.
Description
technical field [0001] The invention relates to a high-alloy steel with extremely high strength-plastic product (the product of tensile strength and elongation). Through alloy composition control and proper heat treatment, the tensile strength of the alloy can reach 600-750MPa, and the elongation can reach 55-85%. Background technique [0002] With the increasingly prominent energy and environmental issues, light weight has become the development trend of modern automobiles, which has higher requirements for the strength and toughness of automobile steel. In addition, in order to improve the passive safety performance of automobiles, the steel for automobiles is required to have the highest possible energy absorption capacity, that is, to have high strength and plasticity. In order to achieve this goal, in recent years, the world's major automobile steel production enterprises and research departments have carried out intensive research and developed a series of steels for ...
Claims
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