A kind of hybrid steel and heat treatment method thereof

A bar and austenite technology, applied in the field of heat treatment, can solve problems such as lack of exploration of heat treatment process, achieve the effect of avoiding red hot brittleness, high corrosion resistance, and realizing efficient utilization of resources

Active Publication Date: 2021-09-28
QINGHAI UNIVERSITY +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

"Hybrid" super steel breaks through the traditional clear classification of special steel materials, and combines various excellent performances such as high strength and corrosion resistance, and various excellent process properties such as nitriding and good dimensional stability. There is a lack of relevant information on the design of steel composition and the corresponding heat treatment process

Method used

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  • A kind of hybrid steel and heat treatment method thereof
  • A kind of hybrid steel and heat treatment method thereof
  • A kind of hybrid steel and heat treatment method thereof

Examples

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Effect test

Embodiment 1

[0032] This embodiment provides a hybrid steel, including the following components in weight percentage: C 0.11%, Si0.13%, Mn0.30%, Cr4.76%, Ni5.90%, V0.48%, Nb0.002%, Mo0.68%, Al1.9%, P0.01%, S0.01%, and the rest is Fe.

[0033] This embodiment provides a method for heat treating the above hybrid steel, comprising the following steps:

[0034] Step 1. According to the composition of the mixed steel, it is refined into a bar with a diameter of 60mm, and the bar is taken to a warm loft and kept at 800°C for 180min; in this embodiment, the austenite transformation start temperature Ac1= 723-10.7Mn-16.9Ni+29.1Si+23.3Cr, Ac1=734°C;

[0035] Step 2: furnace cool the rod after step 1 to 600°C at a cooling rate of 20°C / h, air cool the rod cooled to 600°C to room temperature, and complete the softening annealing treatment; the room temperature is 25°C;

[0036] Step 3. Measure step 2. After air-cooling to room temperature, the diameter of the bar is 60mm, and then take the method of...

Embodiment 2

[0039] This embodiment is the same as Embodiment 1, except that the heating is performed to 540° C. in Step 4.

Embodiment 3

[0041] This embodiment is the same as Embodiment 1, except that the heating is performed to 580° C. in Step 4.

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Abstract

The invention discloses a hybrid steel, which comprises the following components in weight percentage: C 0.10%-0.40%, Si≤0.30%, Mn 0.25%-0.80%, Cr 4.0%-6.0%, Ni 5.00 %~7.00%, V 0.4%~0.6%, Nb≤0.06%, Mo 0.60%~0.80%, Al 1.60%~2.20%, P≤0.02%, S≤0.02%, and the rest is Fe. The composition and raw material design of the hybrid steel in the present invention is based on the alloy composition system and multi-performance compounding, which endows the hybrid steel with controllable multi-performance, and has the characteristics of low-alloy engineering structural steel, tool steel, austenitic-ferritic stainless steel, and heat resistance. The characteristics of steel, high corrosion resistance and avoiding red hot brittleness are conducive to the realization of the purpose of "one steel with multiple uses" and the efficient utilization of resources.

Description

technical field [0001] The invention belongs to the technical field of heat treatment, and in particular relates to a hybrid steel and a heat treatment method thereof. Background technique [0002] In the past two decades, the "super steel", which has led the development of metal structural materials, has achieved great success in theoretical innovation, technological invention and industrial application of "common steel super". In recent years, a lot of pioneering work has been done at home and abroad on the "superization of special steel", and breakthroughs have been made in theoretical innovation and technological invention, and the innovative concept of hybrid steel has emerged as the times require. "Hybrid" super steel breaks through the traditional clear classification of special steel materials, and combines various excellent performances such as high strength and corrosion resistance, and various excellent process properties such as nitriding and good dimensional sta...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C38/02C22C38/04C22C38/06C22C38/46C22C38/48C22C38/44C21D1/32C21D1/18C21D9/00
CPCC21D1/18C21D1/32C21D9/0075C21D2211/008C22C38/02C22C38/04C22C38/06C22C38/44C22C38/46C22C38/48
Inventor 李戬牛金霞张朝磊王英逯德成马潇磊何国宁
Owner QINGHAI UNIVERSITY
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