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A kind of high-strength wear-resistant automobile brake hot-rolled steel plate and its production process

A technology for automobile brakes and hot-rolled steel plates, which is applied in the field of steel materials, and can solve problems such as unsatisfactory strength and hardness that cannot meet consumer expectations, etc.

Active Publication Date: 2020-08-28
JINGYE STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there are also attempts to replace cold-rolled materials with hot-rolled 65Mn materials, but the strength and hardness cannot meet the expectations of consumers and the existing process requirements.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] A high-strength wear-resistant hot-rolled steel plate for automobile brakes, the composition weight percent of which is: C: 0.35-0.4%, Si: 0.5-0.6%, Mn: 1.50-1.80%, Cr: 5-6%, Ni: 1.0-1.2%, Al: 0.5-1.0%, Cu: 0.5-0.6%, Mo: 0.3-0.4%, Co: 0.15-0.25%, W: 0.15-0.25%, Nb: 0.03-0.04%, Ti: 0.02 -0.03%, Ta: 0.05-0.1%, P: ≤0.010%, S: ≤0.002%, N: 0.002-0.0035%, B: 0.001-0.003%, and the rest are Fe and unavoidable impurities. The specific steps are as follows: (1) Smelting: KR hot metal pretreatment to remove S, and control the hot metal S ≤ 0.005%, then carry out top-bottom combined blowing converter smelting, the mass ratio of hot metal to scrap steel is 6-8:1, add scrap steel first, and then add hot metal , the basicity at the end of the converter is 3.5-3.8; the tapping temperature is 1580-1600°C; the slag blocking plug and the slag blocking rod are used to tap double slag blocking;

[0043] (2) Refining: first add aluminum wire, fluorite, lime, control the flow of bottom blowi...

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PUM

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Abstract

The invention discloses a high strength wear resistant hot rolled steel plate used for automobile braking. A production method of the high strength wear resistant hot rolled steel plate used for automobile braking comprises steps of smelting, refining, continuous casting, rough rolling, finish rolling, and heat treatment; after heat treatment, the microscopic tissue crystal grain size of the steelplate used for automobile braking ranges from 20 to 25 <mu>m, the carbide average particle size ranges from 30 to 50nm, Cu enriched phase precipitation is caused, the tissue comprises, by volume, 40to 50% of tempered sorbite, 30 to 35% of martensite, and the balance austenite and bainite; the yield strength ranges from 1000 to 1100MPa, the tensile strength ranges from 1200 to 1350MPa, the percentage elongation ranges from 18 to 25%, and the hardness ranges from 35 to 40HRC.

Description

technical field [0001] The invention belongs to the technical field of iron and steel materials, and in particular relates to a high-strength wear-resistant hot-rolled steel plate for automobile brakes and a production process thereof. Background technique [0002] Existing metal materials for the production of automobile brakes are usually cast iron, martensitic stainless steel, microalloyed steel, etc., and the preparation methods include powder metallurgy, continuous casting, smelting and forging, etc. [0003] Metal materials for automobile brakes are important parts of automobile brake systems, and are also easy-to-wear parts of automobiles, which are directly related to driving safety. The working environment and processing technology of metal materials for automobile brakes require that the steel base has good hardenability, wear resistance, and high strength, etc., and especially requires that the steel base still have a hardness of 14-18HRC after sintering at 600-80...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C38/02C22C38/58C22C38/06C22C38/42C22C38/44C22C38/50C22C38/48C22C38/52C22C38/54C21C1/02C21C5/35C21C7/064C21C7/068C21C7/10C21D8/02
CPCC21C1/02C21C5/35C21C7/064C21C7/068C21C7/10C21D8/0226C21D8/0263C21D2211/001C21D2211/002C21D2211/008C22C38/02C22C38/06C22C38/42C22C38/44C22C38/48C22C38/50C22C38/52C22C38/54C22C38/58Y02P10/20
Inventor 张觉灵杨海西张少凯
Owner JINGYE STEEL CO LTD