Spring steel material for elevator and preparation method of spring steel material

A spring steel and elevator technology, applied in the field of spring steel materials and their preparation, can solve problems such as the performance decline of spring steel and loss of effective components, and achieve the effects of reducing quenching cracking, uniform performance, and improving toughness and elasticity.

Inactive Publication Date: 2015-06-24
SUZHOU MAYFORD ELEVATOR
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The mechanical properties of spring steel mainly depend on the heat treatment process, and the heat treatment process is mainly determined by the materials used. One factor for the high strength of spring steel is to give full play to the role of alloy elem

Method used

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  • Spring steel material for elevator and preparation method of spring steel material

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0026] Example 1

[0027] (1) Put the iron powder 87kg, Mn1.1kg, Cr 0.9kg, B 2 O 3 0.2kg, 0.02kg of Nb and 0.02kg of tourmaline powder are added to water, sent to a ball mill, ball milled, dried, pressed into a block under a pressure of 10Mpa, and then sintered under a nitrogen atmosphere at 90°C for 2 hours. The sintered The material is crushed and passed through a 250-mesh sieve;

[0028] (2) Add 2 kg of polyacrylonitrile-based carbon fibers with a diameter of 8.9 microns to the product of step (1), heat at 65°C, and mix uniformly at a rate of 500 revolutions / minute;

[0029] (3) Put the mixture in step (2) into a mold, press the compact into a compact, place the compact in a sintering furnace, and sinter the compact at a rate of 20°C / min to 400°C for 2 hours;

[0030] (4) The product in step (3) is heated at a rate of 10°C / min to 1075°C and sintered for 1 hour, and finally placed in air to cool to room temperature to obtain a spring steel material for elevators.

[0031] Table 1 sho...

Example Embodiment

[0032] Example 2

[0033] (1) Combine iron powder 87kg, Mn1.5kg, Cr 0.9kg, B 2 O 3 0.5kg, 0.02kg of Nb and 0.02kg of tourmaline powder, add water, send into ball mill, ball mill, dry, press into block under 10Mpa pressure, and then sinter under nitrogen atmosphere at 900℃ for 2 hours. The material is crushed and passed through a 250-mesh sieve;

[0034] (2) Add 2 kg of polyacrylonitrile-based carbon fibers with a diameter of 8.9 microns to the product of step (1), heat at 65°C, and mix uniformly at a rate of 500 revolutions / minute;

[0035] (3) Put the mixture in step (2) into a mold, press the compact into a compact, place the compact in a sintering furnace, and sinter the compact at a rate of 20°C / min to 400°C for 2 hours;

[0036] (4) The product in step (3) is heated at a rate of 10°C / min to 1075°C and sintered for 1 hour, and finally placed in air to cool to room temperature to obtain a spring steel material for elevators.

[0037] Table 1 shows the performance test results of the...

Example Embodiment

[0038] Example 3

[0039] (1) Combine iron powder 93.5kg, Mn1.5kg, Cr 1.2kg, B 2 O 3 0.5kg, Nb0.8kg, tourmaline powder 0.08kg, La 2 O 3 1.1kg and 0.1kg of sodium metasilicate, add water, send to ball mill, ball mill, dry, press into block at 12Mpa pressure, and then sinter under nitrogen atmosphere at 1000℃ for 3 hours, sinter the sintered material After passing through a 300 mesh sieve;

[0040] (2) Add 3 kg of polyacrylonitrile-based carbon fibers with a diameter of 7.1 microns to the product of step (1), heat at 55°C, and mix uniformly at a rate of 600 revolutions per minute;

[0041] (3) Put the mixture in step (2) into a mold, press to form a compact, place the compact in a sintering furnace, and sinter it at a rate of 20°C / min to 400°C for 1 hour;

[0042] (4) The product in step (3) is heated at a rate of 10°C / min to 1160°C and sintered for 1.5 hours, and finally placed in the air to cool to room temperature to obtain a spring steel material for elevators.

[0043] Table 1 shows...

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Abstract

The invention discloses a spring steel material for an elevator and a preparation method spring steel material. The spring steel material for the elevator comprises the following components in parts by weight: 87-93.5 parts of iron, 2-3 parts of polyacrylonitrile-based carbon fiber, 1.1-1.5 parts of Mn, 0.9-1.2 parts of CrO, 0.2-0.5 part of B2O3, 0.02-0.8 part of Nb and 0.02-0.08 part of electric rock flour. The invention further provides a preparation method of the spring steel material for the elevator.

Description

technical field [0001] The invention belongs to the field of materials for elevators, in particular to a spring steel material used for elevators and a preparation method thereof. Background technique [0002] Spring steel is a special steel that has good elasticity and can work repeatedly under dynamic load conditions. It has sufficient toughness, mechanical strength and plasticity, and can perform repeated expansion and contraction. Sudden brittle fracture, so it is mostly used to make steel for springs and elastic components. The elasticity of spring steel depends on its ability of elastic deformation, that is, within the specified range, the ability of elastic deformation makes it bear a certain load, and no permanent deformation occurs after the load is removed. At the same time, spring steel also needs a certain mechanical strength, so that it can not cause plastic deformation when bearing heavy loads, has high fatigue strength, and has a long service life under load....

Claims

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Application Information

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IPC IPC(8): C22C49/08C22C49/14C22C47/14C22C101/10
Inventor 葛晓东王应
Owner SUZHOU MAYFORD ELEVATOR
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