What are the components of spring steel

Composition of spring steel
The spring steel composition analyzer can maintain a fixed size under the action of alternating stress, and it will not cause fatigue fracture prematurely. Therefore, the steel used for spring manufacturing must have high mechanical strength and elastic limit, that is, high ratio of yield point to tensile strength (REL / RM is close to 1) and maximum elastic specific work, The spring steel must have good plasticity and toughness. In order to make the spring steel have the above conditions, the alloy steel with appropriate carbon content should be selected and heat treated. Generally, the basic structure of spring in common use is tempered troostite. This is because tempered troostite has very high elastic limit and certain plasticity
For the quenched and tempered spring, the spring steel composition analyzer requires that the steel has good hardenability, low sensitivity to Chinese people, is not easy to produce decarburization, and is easy to be wound in hot state. For the small spring made of cold drawn steel wire, uniform hardness and good winding performance are required, Spring steel must have high strength, high yield point and fatigue limit. The w (c) of carbon spring steel is in the range of 0.6% ~ 1.05%. Due to the poor hardenability of carbon spring steel, it is not easy to harden when the diameter is greater than 10 ~ 15mm, Ferrite and pearlite will appear in the center of the spring, which will reduce the yield point of the spring, so that the spring is easy to deform and lead to early failure. The spring with large cross section must be made of alloy spring steel. The alloy spring w (c) is generally in the range of 0.46% ~ 0.74%. The alloying elements include silicon, manganese, chromium, vanadium, tungsten, etc, Spring steel produced in China mainly includes carbon steel, manganese steel, silicon manganese steel, chromium silicon steel, chromium alloy steel and so on
2、 Scope and technical requirements of instrument maintenance:
The principle of “special person in charge, prevention first, regular maintenance and timely overhaul” is implemented for the front rapid analyzer equipment. The maintenance, maintenance, debugging and minor repair of the spring front test instrument and equipment are the responsibilities of the experimenter
2. Routine maintenance: refers to the routine maintenance according to the operation and management procedures of the instrument. The main items of Hangzhou spring include external cleaning, lubrication, fastening and appearance inspection of the fast analyzer in front of the spring
3. First level maintenance: this item is from the outside of the equipment to the inside of the equipment (overall cleaning, lubrication and fastening). It mainly includes the partial disassembly inspection and adjustment of the general detachable (such as removing the shell) maintenance instrument, the power on test run or moisture drive of the whole spring front rapid analyzer
4. Second level maintenance: this item mainly refers to the internal maintenance of the spring front rapid analyzer. It mainly includes the disassembly or non disassembly inspection and adjustment of the main components of the general detachable spring front test instrument, and the replacement of vulnerable parts. At the same time, it also includes the re counting and combination of all supporting components in the set of instrument and the replacement of vulnerable parts, It also includes the accuracy check, calibration and calibration of all kinds of instruments which have been used for a long time (more than three years), so that the instruments are always in a clean, lubricated, safe and available technical state
3、 Scope and technical requirements of instrument repair:
1. The repair of fast analyzer before spring refers to repairing the instrument and equipment damaged due to normal or unusual factors (such as human factors due to improper use and maintenance), so as to restore (basically recover) to the original technical state
For the repair of the instrument, it is necessary to follow the repair procedures of the equipment in Shanghai.