Method for preparing high-performance maraging-steel steel belt

A maraging steel, high-performance technology, applied in the field of steel strip manufacturing, can solve the problems of not being able to better meet industrial needs, and unable to further improve the mechanical properties of steel strips such as tensile strength and yield strength, etc. The effect of improving strength and toughness and improving mechanical strength

Inactive Publication Date: 2014-10-08
江苏润源控股集团有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The existing manufacturing method of maraging steel strip includes smelting; thin strip continuous casting; controlled cooling and coiling; pickling, direct cold rolling, annealing; pickling and cold rolling again to reach the thickness of the finished product; The thickness of the steel strip is annealed, pickled, leveled and other steps. This method has the advantages of simple and stable production process, but this method cannot further improve the mechanical properties of the steel strip such as tensile strength and yield strength, so it cannot better meet the requirements. industrial needs

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Preparation of high-performance maraging steel CM400 steel strip, the components and percentages of the maraging steel are: Ni 17.5-19.0%, Co 14-15%, Mo 6.5-6.8%, Ti 1.0-1.3 %, Al 0.1~0.15%, C≤0.003%, S≤0.005%, P≤0.005%, O≤0.004%, N≤0.004%, and the rest is Fe.

[0035] Vacuum smelting step: The maraging steel CM400 is batched according to the above components and their percentages, and the ingredients are placed in a vacuum induction furnace in the set order for vacuum smelting. The vacuum degree of the vacuum induction furnace is ≤10 -4 Pa.

[0036] Vacuum consumable step: use the steel ingot cast after vacuum smelting in a vacuum induction furnace as a consumable electrode, and place the consumable electrode in a vacuum consumable electric arc furnace for vacuum consumable crystallization and remelting. Vacuum degree of consumable electric arc furnace ≤10 -4 Pa.

[0037] Homogenization treatment step: Place the steel ingot cast after consumable remelting in a vacuu...

Embodiment 2

[0045] Prepare high-performance maraging steel custom475 steel strip, the components and percentages of the maraging steel are: Ni 7.5-8.5%, Co 8.0-9.0%, Mo 4.5-5.5%, Ti 1.0-1.3 %, Al 1.0-1.5%, Cr 10.5-11.5%, and the rest is Fe.

[0046] Vacuum smelting step: The maraging steel custom475 is batched according to the above components and their percentages, and the ingredients are placed in a vacuum induction furnace in the set order for vacuum smelting. The vacuum degree of the vacuum induction furnace is ≤10 -4 Pa.

[0047] Vacuum consumable step: use the steel ingot cast after vacuum smelting in a vacuum induction furnace as a consumable electrode, and place the consumable electrode in a vacuum consumable electric arc furnace for vacuum consumable crystallization and remelting. Vacuum degree of consumable electric arc furnace ≤10 -4 Pa.

[0048] Homogenization treatment step: put the steel ingot cast after consumable remelting in a vacuum consumable electric arc furnace in ...

Embodiment 3

[0056] Preparation of high-performance maraging steel MA164 steel strip, the components and percentages of the maraging steel are: Ni 12-13%, Co 8.0-9.0%, Mo 4.5-5.5%, Cr 12-13 %, the rest is Fe.

[0057] Vacuum smelting step: The maraging steel MA164 is batched according to the above components and their percentages, and the ingredients are placed in a vacuum induction furnace in the set order for vacuum smelting. The vacuum degree of the vacuum induction furnace is ≤10 -4 Pa.

[0058] Vacuum consumable step: use the steel ingot cast after vacuum smelting in a vacuum induction furnace as a consumable electrode, and place the consumable electrode in a vacuum consumable electric arc furnace for vacuum consumable crystallization and remelting. Vacuum degree of consumable electric arc furnace ≤10 -4 Pa.

[0059] Homogenization treatment step: Place the steel ingot cast after consumable remelting in a vacuum consumable electric arc furnace in a vacuum heat treatment furnace at ...

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Abstract

The invention discloses a method for preparing a high-performance maraging-steel steel belt. The method comprises the following steps of vacuum smelting, vacuum self-consuming, homogenizing, forging, hot-rolling, cold-rolling and ageing, wherein the vacuum smelting step is used for batching maraging-steel according to components and percentage content, and placing batched materials in a vacuum induction furnace according to a set sequence; the vacuum self-consuming step is used for using smelted steel ingot as a self-consuming electrode, placing the self-consuming electrode in a vacuum self-consuming electric-arc furnace and carrying out vacuum self-consuming crystallization and re-smelting; the ageing step is used for placing the cold-rolled steel belt into a liquid nitrogen slot at -196 DEG C, preserving heat for 2 hours at a ultralow temperature, then taking out the steel belt, placing the steel belt in a vacuum thermal treatment furnace after naturally cooling the steel belt to the room temperature, and taking out after preserving heat for 2-4 hours at 450-500 DEG C to obtain high-performance maraging-steel steel belt. The method disclosed by the invention further improves mechanical strength of the steel belt, further improves toughness of the steel belt at the same time, and satisfies industrial needs better.

Description

technical field [0001] The invention relates to a method for manufacturing a steel strip, in particular to a method for manufacturing a maraging steel strip. Background technique [0002] Since the advent of maraging steel, it has been widely researched and applied in aerospace, aviation, automobile and many other fields due to its high strength, high toughness and good process performance. Maraging steel is easy to manufacture and process, and has excellent welding performance. Among all the materials developed today, it is the steel with the highest strength and toughness. [0003] The existing manufacturing method of maraging steel strip includes smelting; thin strip continuous casting; controlled cooling and coiling; pickling, direct cold rolling, annealing; pickling and cold rolling again to reach the thickness of the finished product; The thickness of the steel strip is annealed, pickled, leveled and other steps. This method has the advantages of simple and stable pro...

Claims

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Application Information

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IPC IPC(8): C21D8/02
Inventor 王占洪张勋寅刘志刚
Owner 江苏润源控股集团有限公司
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