Heat treatment method for high-chromium steel and heat-treated high-chromium steel
A heat treatment method and high-chromium steel technology, applied in the heat treatment of high-chromium steel, heat-treating high-chromium steel field, can solve problems such as limiting the application range of materials, and achieve the effect of improving hardness, improving impact toughness, and improving impact toughness
Active Publication Date: 2021-06-18
SONGSHAN LAKE MATERIALS LAB +1
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[0005] However, although the existing high-chromium steel heat treatment process can increase the hardness of the high-chromium steel by about 5-10HRC so that the hardness of the high-chromium steel after heat treatment can reach 55-60HRC, the high-chromium steel obtained under this heat treatment condition Impact toughness usually only reaches 3~4J / cm 2 , which severely limits the application range of the material
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[0019] In order to make the purpose, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below. Those who do not indicate the specific conditions in the examples are carried out according to the conventional conditions or the conditions suggested by the manufacturer. The reagents or instruments used were not indicated by the manufacturer, and they were all conventional products that could be purchased from the market.
[0020] It should be noted that, in the description of the present application, unless otherwise specified, the range of "value a to value b" includes the values "a" and "b" at both ends, and the "value a to value b+measurement unit" in " The "unit of measurement" represents the "unit of measurement" of both the "numerical value a" and the "numerical value b", and the meanings of "above c" and "below c" also inclu...
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The invention provides a heat treatment method for high-chromium steel and the heat-treated high-chromium steel, and belongs to the technical field of steel machining. The heat treatment method for the high-chromium steel comprises the following steps that the high-chromium steel is subjected to high-temperature austenitizing treatment firstly, the high-chromium steel is subjected to low-temperature austenitizing treatment, then the high-chromium steel is subjected to cooling treatment by adopting a cooling medium, the treatment temperature in the high-temperature austenitizing treatment step is 1140 DEG C-1160 DEG C, the treatment temperature in the low-temperature austenitizing treatment step is 850 DEG C-1050 DEG C, and the cooling speed of the cooling medium to the high-chromium steel is 30 DEG C / min-100 DEG C / min. According to the treatment method, the impact toughness is effectively improved while the heat-treated high-chromium steel has relatively high hardness; and according to the heat-treated high-chromium steel prepared through the heat treatment method for the high-chromium steel, the hardness of the heat-treated high-chromium steel is larger than or equal to 55 HRC, and the impact toughness of the heat-treated high-chromium steel is larger than or equal to 8 J / cm < 2 >.
Description
technical field [0001] The present application relates to the technical field of steel processing, in particular to a heat treatment method for high-chromium steel and heat-treated high-chromium steel. Background technique [0002] Due to the high content of carbon and alloy elements, high-chromium steel has high strength and wear resistance, and can be widely used as wear-resistant materials. [0003] In the prior art, in order to obtain better performance of the steel, heat treatment is usually performed on the steel to transform the austenite in the steel into martensite, thereby effectively increasing the hardness of the steel. The austenite in the high chromium steel matrix is mostly in a supersaturated state due to the solid solution of a large amount of alloying elements such as carbon and chromium during the solidification process, resulting in the Ms point (the two-phase free energy of austenite and martensite The temperature at which the difference reaches the m...
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IPC IPC(8): C21D6/00C21D1/18
CPCC21D6/002C21D1/18
Inventor 付超张海峰贾继欣刘少华战斗陈杰
Owner SONGSHAN LAKE MATERIALS LAB