Year1
- 品牌：
- 日本住友
- 规格：
- 齐全
- 厂家：
- 日本
Spring steel
Spring steel mainly has good elasticity and because it is under dynamic load environmental conditions Therefore, the most important material for making springs should have high yield strength, which will not cause plastic deformation when bearing heavy loads, should have high fatigue strength, have a long service life under repeated loads, and have sufficient toughness and plasticity. To prevent sudden brittle fracture under impact force.
Process performance
Springs are used under impact, vibration or long-term cross stress, so spring steel is required to have high tensile strength, elastic limit, and high fatigue strength. In terms of technology, spring steel is required to have a certain degree of hardenability, be difficult to decarburize, and have good surface quality. Carbon spring steel is a high-quality carbon structural steel with a carbon content in the range of .%-.%
. Alloy spring steel is mainly silicon-manganese steel. Their carbon content is slightly lower, and performance is mainly improved by increasing the silicon content. There are also alloy spring steels made of chrome, tungsten, and vanadium. In recent years, combined with Chinese resources and in accordance with the requirements of new technologies in automobile and tractor design, new steel types have been developed based on silicon-manganese steel with boron, niobium, molybdenum and other elements added to extend the service life of springs and improve spring quality.
Performance requirements
Springs are used under impact, vibration or long-term cross stress, so spring steel is required to have high tensile strength, elastic limit, and high fatigue strength. In terms of technology, spring steel is required to have a certain degree of hardenability, be difficult to decarburize, and have good surface quality. Carbon spring steel is a high-quality carbon structural steel with a carbon content in the range of .%-.%
. Alloy spring steel is mainly silicon-manganese steel. Their carbon content is slightly lower, and performance is mainly improved by increasing the silicon content. There are also alloy spring steels made of chrome, tungsten, and vanadium. In recent years, combined with Chinese resources and in accordance with the requirements of new technologies in automobile and tractor design, new steel types have been developed based on silicon-manganese steel with boron, niobium, molybdenum and other elements added to extend the service life of the spring and improve the quality of the spring
Heat treatment
Spring steel requires higher strength and fatigue limit and is generally used in the state of quenching and tempering at medium temperature to obtain a higher elastic limit. Heat treatment technology has a crucial impact on the intrinsic quality of springs. Therefore, how to further improve the fatigue life of springs requires further research. In particular, chemical surface modification heat treatment, shot peening, etc. all have an important impact on the fatigue life of springs. In order to further strengthen the surface strength of the valve spring, increase the compressive stress, and improve the fatigue life, the valve spring must be further processed by nitriding, low-temperature liquid carbonitriding or sulfur nitriding after forming and then shot peened. For example, Japan compares the fatigue limit of oil-quenched steel wires that have been carbonitrided at ℃ and low temperature with medium-temperature tempering at ℃. The infiltration of nitrogen not only eliminates the adverse effects of decarburization but also improves the residual compressive stress. The high-temperature strength of the valve spring that has been nitrided and low-temperature liquid carbonitriding at the same time is increased. The deformation amount at ℃ is .%
(The specified value is .%) The deformation amount at ℃ is .%, which improves the thermal stability and anti-relaxation stability of the valve spring
However, the nitriding and liquid carbonitriding time should be strictly controlled, otherwise a network will be formed Sulfides and reticular nitrides will instead reduce fatigue strength. To improve the strength of the valve spring, you can also choose shot peening. According to production practice, there are two kinds of shot peening available for valve springs. One diameter is. Its microhardness is. The other diameter. Its microhardness is.
Three shots of shot peening can achieve a better strengthening effect and improve the surface quality.
Scope
This standard specifies the ordering content, size, shape, weight and allowable deviations, technical requirements, test methods, inspection rules, packaging, marking and quality of hot-rolled, forged and cold-drawn spring steel. Certificates, etc. This standard applies to spring steel round steel and square steel (hereinafter referred to as bars) with a diameter or side length not greater than Quenched-tempered spring steel wire rod ( )). Bars with larger diameters or side lengths, flat steels with larger thicknesses, and wire rods with larger diameters can also be supplied through negotiation between the supply and demand parties. The grades and chemical compositions specified in this standard also apply to steel ingots, billets and their products. (Factory direct sales of Xiangyun Metal Materials Co., Ltd.)
About Integrity
Xiangyun Metal operates high-quality spring steel direct sales spring steel rods with integrity, guarantees credibility and reliable quality
Xiangyun Metal operates high-quality springs with integrity Steel direct sales spring steel wire joint development quality guarantee
Xiangyun Metal operates with integrity and good quality spring steel direct sales spring steel strips with high quality and low price guarantee of quality
Xiangyun Metal operates with integrity and good quality spring steel direct sales spring steel wire Strive for excellence and quality guarantee
Xiangyun Metal operates with integrity, good quality spring steel, direct sales of spring steel sheets, professional direct sales, quality assurance
Xiangyun Metal operates with integrity, good quality spring steel, direct sales, spring steel coils, quality guarantee
I (Xiangyun Company) have always believed that only by treating people with sincerity can we demonstrate effectiveness. All effective work is based on some kind of integrity as a prerequisite. No matter how big or small the business is, honesty comes first. Keeping a promise is difficult even if it is too close to be true.
About price
On the premise of ensuring the quality of our products, we will give the most preferential prices to satisfy customers. This has always been our goal to allow customers to purchase satisfactory products at the least cost and in the shortest time. Create the most effective product.
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