Bearing steel bar, G20CrNiMo rolling bearing steel bar, bearing steel round bar

包装：

标准

规格：

齐全

用途：

广泛

The full name of bearing steel is rolling bearing steel. It is a steel used to make balls, rollers and bearing rings. It is also sometimes used to make tools such as dies, measuring tools, taps, etc. It has high compressive strength and fatigue limit, high hardness, high wear resistance and certain toughness, good hardenability, and extremely strict control of sulfur and phosphorus. It is a high-grade high-quality steel that can be used as cold working mold steel. In recent years, bearing steel has generally developed towards high quality, high performance and multiple varieties. Bearing steel is divided into high carbon chromium bearing steel, carburized bearing steel, high temperature bearing steel, stainless bearing steel and special special bearing materials according to characteristics and application environment. For high-carbon chromium bearing steel, add the symbol
at the beginning of the grade, but do not indicate the carbon content. The chromium content is expressed in parts per thousand and other alloying elements are expressed according to the alloy content of the alloy structural steel. For example: the grade of bearing steel with an average chromium content of
%
is expressed as
. Carburized bearing steel adopts the grade expression method of alloy structural steel and adds a symbol at the head of the grade
/>. For example:
. For high-quality carburized bearing steel, add
at the end of the grade. For example:
. High-carbon chromium stainless bearing steel and high-temperature bearing steel are made of stainless steel and heat-resistant steel. The method of indicating the grade is to add no symbol to the head of the grade
. For example: high carbon chromium stainless bearing steel
. and high temperature bearing steel
.
. The International Organization for Standardization
. Incorporated some common bearing steel grades into international standards and divided bearing steel into: fully hardened bearing steel, surface hardened bearing steel, stainless bearing steel, high temperature bearing Steel and other four categories, a total of
steel numbers.
. Since bearings should have characteristics such as long life, high precision, low heat generation, high speed, high rigidity, low noise, and high wear resistance, the bearing steel should have: high hardness, uniform hardness, and high elastic limit. , high contact fatigue strength, necessary toughness, certain hardenability, and corrosion resistance in atmospheric lubricants. In order to achieve the above performance requirements, strict requirements are imposed on the uniformity of chemical composition, content and type of non-metallic inclusions, carbide particle size and distribution, and decarburization of bearing steel. The main alloying elements in high carbon bearing steel include carbon, chromium, silicon, manganese, vanadium and other chemical components
/
. The range of element content (
%
.) is:
. :
-.
. :
-.
. :
-.
. :
. :=. .-. :. :. :. +
. . The most important elements carbon, sulfur, manganese, chromium and molybdenum in bearing steel can be quickly measured before the furnace using a

.-type computer multi-element analyzer
:#>
. Most bearings use
. Among the steel types,
. That is, domestic chromium steel (
.).
. The chemical composition of . has been standardized as a material for bearings in various countries around the world. For example: it is the same type of steel as
. (USA),
D
. (West Germany),

. (UK), etc. The use of this material effectively improves the torque performance of the bearing, reduces noise and extends life. However, in humid or high-temperature environments, martensitic stainless steel materials need to be used