Application:
Used in GB/T4338 "High Temperature Tensile Test Method for Metal Materials", HB5195 "Metal High Temperature Tensile Test Method", GB/T2039 "Metal Tensile Creep and Durability Test Method", HB5150 "Metal High Temperature Tensile Durability Test Method" Strength inspection test in high temperature environment.
System composition
The electric furnace system consists of: high temperature furnace body, temperature measurement and control system, heating element, temperature measurement element, adjustable arm system, high temperature tensile fixture and connecting accessories, high deformation measurement device, water cooling circulation system,etc.
Structural principle and characteristics
3.1High temperature furnace body (Domestic mechanical extension device)
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3.2 High temperature furnace body (imported plug-in high temperature extensometer)
The furnace body adopts a split structure, the outer wall is made of high-quality stainless steel, and the interior is made of high-temperature resistant alumina furnace tube. The furnace tube and the furnace wall are filled with thermal insulation ceramic fiber cotton, which has good thermal insulation effect and small temperature rise on the surface of the furnace body.
There are grooves on the inner wall of the furnace tube, and the iron-chromium-aluminum resistance wire is embedded in the furnace tube according to the length of the soaking zone and the requirements of temperature gradient and fluctuation. The upper and lower holes of the furnace body are small openings, which can reduce heat loss.
The rear of the furnace body is equipped with a hinge, which is convenient for connection with the rotating support arm or column.
3.3 The heating element is a helical iron-chromium-aluminum resistance wire. The heating body is divided into three stages of control.
3.4 The temperature measuring element adopts NiCr-NiSi (K type) thermocouple, with three-segment measurement.
3.5 High temperature fixture and connection accessories
According to the operating temperature requirements, the high temperature fixture and the high temperature pull rod are made of high temperature resistant alloy material of K465.
The bar samples are connected by thread, and the samples of different specifications are equipped with one-to-one corresponding high-temperature fixtures.
The plate sample is connected by pyramid selling, and the clamping thickness is downward compatible from the maximum specification: when clamping a sample with a small thickness, positioning pins of different specifications are added on both sides of the sample to ensure that the sample is on the tensile axis.
High temperature tie rod and high temperature fixture: Φ30mm (approx.)
The mechanical properties of K465 high temperature alloy material are as follows:
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