High temperature creep test solutions

WANCE Testing Machine   admin666

When it comes to the mechanical properties testing of metal materials, most people may be exposed to the uniaxial tensile test at room temperature. However, in the military industry, energy, chemical industry, metallurgy, aerospace and other fields, many metal material parts must work under high temperature conditions for a long time. Therefore, for the metal materials used in special environments, It is obviously not enough to take mechanical properties under normal temperature, short time and static load as the basis for design and selection of materials, because the mechanical properties of some materials will change obviously under high temperature environment. If the working stress of the material is less than the yield strength of the material, slow and continuous plastic deformation may occur in the long-term working process, that is, creep phenomenon, and when the material is in the high-temperature heating environment or near the melting point for a long time, this high-temperature creep phenomenon will become more intense.

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High temperature creep can be divided into high temperature compression creep, high temperature tensile creep, high temperature bending creep and high temperature torsional creep due to different ways of applying stress. High temperature creep is related to the material and structural characteristics of materials. It can predict the strain trend and fracture life of materials under long-term use at high temperature more effectively than high temperature strength, and is one of the important mechanical properties of materials.

The creep properties of metal materials can be expressed as creep limit and endurance strength limit, which are different in definition and application scope. Suitable test methods can be selected according to actual needs.

1. Creep limit

In order to ensure that the material under high temperature and long load does not produce excessive creep, it is required that the metal material has certain creep limit. Similar to the yield strength at room temperature, creep limit reflects the plastic deformation resistance index of metal materials under high temperature and long time load, which is suitable for material design and selection under working conditions where excessive creep deformation is not allowed.

2. Endurance strength limit

In some working conditions, the creep deformation is very small or the deformation requirements are not high, only the material does not fracture during use. In this case, the endurance strength limit which can reflect the creep fracture resistance can be selected as the basis of material selection design.

Different creep properties correspond to different test methods and standards. Therefore, in order to meet the research needs of different customers on the creep properties of materials, 


① Lelver type creep and stress rupture testing machine

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Lelver type creep and stress rupture testing machine is mainly used for high temperature alloy, titanium alloy, the other black metal, non-ferrous metal bar and plate specimen, high temperature endurance, high temperature creep test, the equipment adopt mechanical loading ways of the level of leverage, draw lessons from international experience with horizontal layout, use more convenient, greatly reduces the labor intensity, USES the import industrial control system more stable and durable, More suitable for all kinds of harsh environment. The testing machine hardware includes force value loading system, high temperature test furnace, high temperature deformation measurement system, temperature measurement and control system, timing device and safety protection device and other functional components. Operation localization, comprehensive information, local storage, fast and stable data transmission. Intelligent reminder, remote alarm and other functions. Space saving, simple and clear wiring. The equipment can realize automatic heating, heat preservation, loading, data recording, unloading, result saving and other functions after program setting.


② Motorized type creep and stress rupture testing machine

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Motorized type creep and stress rupture testing machine it is mainly used for high temperature endurance, high temperature creep, stress relaxation, loading test, program control test and periodic loading test of bar and plate samples of superalloy, titanium alloy, other ferrous metal and non-ferrous metal. Adopt more stable and durable imported industrial control system, more suitable for all kinds of harsh environment. The testing machine hardware includes force value loading system, high temperature test furnace, high temperature deformation measurement system, temperature measurement and control system, timing device and safety protection device and other components. Operation localization, comprehensive information, local storage, fast and stable data transmission. Intelligent reminder, remote alarm and other functions. Space saving, simple and clear wiring. Equipped with the test software in addition to high temperature creep, durable test control, but also has the force value, test temperature and ambient temperature curve output and data list function; The equipment can also realize automatic heating, heat preservation, loading, data recording, unloading, result saving and other functions after program setting.

As one of the symbolic properties of high temperature resistant materials, high temperature creep is worthy of attention and attention. Wantawei will continue to follow the customer experience and market demand, and continue to create and expand new, committed to providing our customers with quality and professional test products and services!


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