Dongguan Xiangyun Metal Materials Co

Introduction to spring steel
Spring steel mainly has good elasticity, and because it works under dynamic load environmental conditions, the most important material for making springs should have high yield strength and not be able to withstand heavy loads. To cause plastic deformation, it should have high fatigue strength, long service life under repeated loads, and sufficient toughness and plasticity to prevent sudden brittle fracture under impact force.
Spring steel refers to steel specifically used for the manufacture of springs and elastic elements due to its elasticity in the quenched and tempered state. The elasticity of steel depends on its ability to elastically deform, that is, within a specified range, its ability to elastically deform allows it to withstand a certain load without permanent deformation after the load is removed.
Spring steel should have excellent comprehensive properties, such as mechanical properties (especially elastic limit, strength limit, yield ratio), anti-elasticity loss performance (i.e. anti-elasticity loss performance, also known as anti-relaxation performance), fatigue performance , hardenability, physical and chemical properties (heat resistance, low temperature resistance, oxidation resistance, corrosion resistance, etc.). In order to meet the above performance requirements, spring steel has excellent metallurgical quality (high purity and uniformity), good surface quality (strict control of surface defects and decarburization), precise shape and size.
Carbon Spring Steel
The carbon content (mass fraction) of carbon spring steel is generally ~. According to its manganese content, it is divided into two categories: general manganese content (mass fraction) (~) such as, ,, and higher manganese content (mass fraction).
Alloy Spring Steel
Alloy spring steel is based on carbon steel, by appropriately adding one or several alloy elements to improve the mechanical properties, hardenability and other properties of the steel to meet the requirements of manufacturing Steel with various properties required for springs.
The basic series of alloy spring steel include silicon-manganese spring steel, silicon-chromium spring steel, chromium-manganese spring steel, chromium-vanadium spring steel, tungsten-chromium-vanadium spring steel, etc. On the basis of these series, some grades have added alloying elements such as molybdenum, vanadium or boron in order to improve some aspects of their performance.
In addition, some grades are selected as spring steel from other steel types, such as high-quality carbon structural steel, carbon tool steel, high-speed tool steel, and stainless steel.
Classification according to production and processing methods
1. Hot-rolled (forged) steel products include hot-rolled round steel, square steel, flat steel, steel plates, and forged round steel and square steel.
2. Cold drawn (rolled) steel products include steel wire, steel strip, and cold drawn materials (cold drawn round steel).
Classification according to steel delivery status
⒈ Hot rolled (forged) steel
Hot rolled (forged) steel is delivered in a state that is hot formed into springs and then quenched and tempered.
The steel delivered in the annealed state is cold formed into springs and then quenched and tempered.
The above should comply with the corresponding hardness requirements of the delivery state.
⒉ Cold drawn (rolled) steel
Wire
① Lead bath austempered cold drawn steel wire (also known as Paiden detachable cold drawn steel wire) The steel wire only needs to be tempered at low temperature after being made into springs , to relieve stress.
② After the oil quenching and tempering steel wire is cold drawn to the required size, it is continuously heated, oil quenched and lead tempered. After the steel wire is made into a spring, it only needs to be bottom-heated to eliminate stress.
③ Cold-drawn steel wire (that is, steel wire without quenching and tempering treatment)
Delivered in cold-drawn state.
Delivered in annealed, normalized or tempered condition.
The steel wire delivered in the above two conditions must be quenched and tempered after being made into springs.
Strips
① The springs are delivered in cold-rolled state and need to be tempered at low temperature to eliminate stress.
② Delivered in quenched and tempered state. After the spring is made, it must be tempered at low temperature to remove stress.
③ After being delivered in the annealed state, the spring must be quenched and tempered
Drawn steel
The steel delivered in the annealed state is cold formed into a spring, and then quenched and tempered deal with.
Other classification methods
In addition to the above, there are some other classification methods, such as
According to different delivery conditions, it can be divided into delivery by chemical composition (mechanical properties) and delivery by quenching Transparent delivery.
According to the working conditions of the spring, it can be divided into static load spring steel, impact load spring steel, high (low) temperature resistant spring and corrosion resistant spring steel.
[Xiangyun] Purchasing Process
) Customers who have the intention to purchase our company's steel products make inquiries about our company's steel products. Our company conducts inquiries and quotes based on the steel types and specifications required by customers.
) After confirming the availability of goods and reaching an agreement on price with the customer, your company will fax your company's invoicing information and related materials to our company for record keeping in preparation for our company to issue an invoice to you after delivery.
) Because customers are in different regions, we will communicate logistics matters with customers before shipping. Our company currently has two shipping methods: freight and express logistics. Customers can choose our company to arrange logistics according to their own circumstances, or they can solve it themselves.
) After the logistics is formed, our company will notify customers to make remittances through Alipay or corporate-to-public accounts. (If you choose company-to-public account remittance, you must complete the corresponding operations before shipping. Our company will ship the goods to the customer immediately after confirming receipt of the payment)
) After the customer receives the goods and has no other objections, our company The VAT invoice of a general taxpayer will be delivered to the customer by express delivery within one working day.
) In the end, the entire transaction was successfully concluded, and corresponding after-sales service issues were assumed.