Heat treatment design of YZ25SiMnMoV flat steel for railway load bearing
A flat steel and railway technology, applied in the field of heat treatment design of YZ25SiMnMoV flat steel for railway load-bearing, can solve the problems of poor mechanical properties, short service life, poor tensile performance, etc., and achieve long service life, high safety, strong resistance The effect of impact properties
Pending Publication Date: 2022-07-22
营口中车型钢新材料有限公司
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Problems solved by technology
[0003] The existing railway load-bearing flat steel has some shortcomings in the process of use, such as low safety, poor mechanical properties, poor tensile properties, and short service life. Therefore, we propose a new type of railway load-bearing YZ25SiMnMoV flat steel Steel solves the above problems
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Embodiment 1
[0041] A heat treatment design of YZ25SiMnMoV flat steel for railway load-bearing, comprising the following components: carbon 0.23-0.27%, silicon 1.00-1.20%, manganese 1.60-1.80%, vanadium 0.08-0.12%, aluminum.003-0.009%, chromium 0.0.13~0.16%, copper≤0.10%, phosphorus≤0.015%, sulfur≤0.003%, molybdenum 0.33-0.37%, Ni≤0.10%.
[0042] Wherein: the mechanical properties of the YZ25SiMnMoV flat steel for railway load-bearing are: Rm≥1200MPa, Rel≥950MPa, A≥8%, impact energy AKV (-20°C)≥15J.
[0043] Among them: including the following steps:
[0044] Step 1: In order to obtain better comprehensive mechanical properties, the heat treatment system of YZ25SiMnMoV flat steel for railway load-bearing is formulated as a "normalizing + quenching + tempering" process route, in which the main purpose of normalizing is to refine grains and the purpose of quenching It is to make YZ25SiMnMoV flat steel obtain martensitic structure, and tempering is to reduce the brittleness of hardened steel...
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Abstract
The invention belongs to the technical field of steel for railways, and particularly relates to a heat treatment design of YZ25SiMnMoV flat steel for railway load bearing, which comprises the following components: 0.23-0.27% of carbon, 1.00-1.20% of silicon, 1.60-1.80% of manganese, 0.08-0.12% of vanadium, 0.003-0.009% of aluminum, 0.0.13-0.16% of chromium, less than or equal to 0.10% of copper, less than or equal to 0.015% of phosphorus, less than or equal to 0.003% of sulfur, 0.33-0.37% of molybdenum and less than or equal to 0.10% of Ni. The YZ25SiMnMoV flat steel is reasonable in structure, has better mechanical properties, high structural strength, strong tensile property and long service life in the use process, and can be widely applied to railway load bearing. And the safety is higher.
Description
technical field [0001] The invention relates to the technical field of railway steel, in particular to a heat treatment design of a YZ25SiMnMoV flat steel for railway load-bearing. Background technique [0002] Flat steel refers to steel with a width of 12-300mm, a thickness of 4-60mm, a rectangular cross-section and a slight blunt edge. The materials of flat steel mainly include carbon structural steel, high-quality carbon structural steel, and low-alloy high-strength structural steel. Flat steel can be finished steel, and can also be used as blanks for welded pipes and thin slabs for stacked sheets. Flat steel can be used as finished material to make hoop iron, tools and mechanical parts, and it can be used as building frame structure, escalator and so on. [0003] The existing railway load-bearing flat steel has some shortcomings in the process of use, such as low safety, poor mechanical properties, poor tensile performance, and short service life. For this reason, we p...
Claims
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IPC IPC(8): C21D6/00C21D1/18C21D1/28C22C38/02C22C38/06C22C38/42C22C38/44C22C38/46C22C38/58
CPCC21D6/008C21D6/005C21D6/004C22C38/02C22C38/06C22C38/46C22C38/58C22C38/42C22C38/44C21D1/28C21D1/18C21D2211/008
Inventor 邢长旺李慈雷王宇辛士杰李秀杰英寿鹏崔文华
Owner 营口中车型钢新材料有限公司