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High-strength and high-toughness alloy tool steel wire rod and manufacturing method thereof

A manufacturing method and technology for tough alloys, applied in manufacturing tools, furnaces, heat treatment equipment, etc., can solve the problems of poor hardenability, shorten the manufacturing cycle, reduce manufacturing costs, etc., achieve excellent torsional fracture resistance, and improve the effect of technical level

Pending Publication Date: 2022-04-12
BAOSHAN IRON & STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0010] The publication number is CN107419175A, and the publication date is December 1, 2017. The Chinese patent document titled "Economic tool steel with good fatigue life and its production method" discloses a production method of economical tool steel with good fatigue life , the alloy composition of the material is: C: 0.75-1.00%, Si: 0.15-0.35%, Mn: 0.50-1.20%, Cr: 0.30-1.10%, V: 0.05-0.20%, Alt≤0.040%, P≤0.020 %, S≤0.010%, N≤0.006%, uniform granular pearlite structure is obtained after hot rolling and annealing, and fine tempered martensite structure is obtained after quenching and tempering. This production method greatly shortens the manufacturing cycle and reduces Manufacturing cost, but the rolling process is only applicable to plates, and the alloy composition does not contain Mo element, and the hardenability is poor

Method used

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  • High-strength and high-toughness alloy tool steel wire rod and manufacturing method thereof
  • High-strength and high-toughness alloy tool steel wire rod and manufacturing method thereof
  • High-strength and high-toughness alloy tool steel wire rod and manufacturing method thereof

Examples

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Effect test

Embodiment 1-8

[0053] The high-strength and tough alloy tool steel wire rods of Examples 1-8 of the present invention are all prepared by the following steps:

[0054] (1) According to the chemical composition shown in Table 1, smelt, cast, and roll into wire rod: the wire rod specification is φ8 ~ 12mm, and slow cooling measures are taken when the rolled wire rod passes through the Stelmo air-cooled line. When the Telmore air-cooled wire is used, turn off all fans and cover the insulation cover to reduce the cooling rate of the wire rod.

[0055] (2) Off-line spheroidizing annealing: the wire rod is first heated to 775-840°C with the furnace, and the first holding time is controlled to be 4-6h, and then cooled to the first time at a speed of 10-50°C / h. The final cooling temperature is 710-750°C, the second heat preservation is 4-7h, and then cooled to the second final cooling temperature of ≤600°C at a second speed of 10-50°C / h.

[0056] (3) Quenching and tempering heat treatment is carrie...

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Abstract

The invention discloses a high-strength and high-toughness alloy tool steel wire. The high-strength and high-toughness alloy tool steel wire further comprises the following chemical elements in percentage by mass besides Fe: 0.60-0.90 wt% of C, 1.00-3.00 wt% of Si, 0.45-1.00 wt% of Mn, 0.45-1.00 wt% of Cr, 0.20-0.60 wt% of Mo and the balance of Fe. Wherein the microstructure of the high-strength and high-toughness alloy tool steel wire is tempered martensite and dispersedly distributed spherical carbides. In addition, the invention further discloses a manufacturing method of the high-strength and high-toughness alloy tool steel wire rod, which comprises the following steps of: (1) smelting, casting and rolling into a wire rod; (2) off-line spheroidizing annealing; (3) after a wire rod is manufactured through a machining procedure, quenching and tempering heat treatment is conducted, specifically, the wire rod is heated to the austenitizing temperature of 820-960 DEG C, heat preservation is conducted for 0.5-1 h, and quenching cooling is conducted to the room temperature at the speed of 1-50 DEG C / s; and heating to 200-400 DEG C again, tempering, and keeping the temperature for 0.5-3 hours. The high-strength and high-toughness alloy tool steel wire has excellent torsional fracture resistance and can be effectively applied to the field of hardware tools.

Description

technical field [0001] The invention relates to a metal material and a manufacturing method thereof, in particular to an alloy tool steel wire rod and a manufacturing method thereof. Background technique [0002] Tool steel is a general term for high-quality steel used in various tools, cutting tools and measuring tools that require high hardness, toughness and wear resistance. According to the alloy composition, tool steel can be divided into three categories: carbon tool steel, alloy tool steel and high-speed tool steel. Based on the working conditions of tool steel, it is generally required to have the following characteristics: (1) high hardness and good wear resistance at the service temperature; (2) good heat treatment performance, not easy to cause quenching cracking, and good tempering stability; ( 3) It has certain toughness, impact resistance, torsional or bending load and other properties; (4) It has certain special properties such as corrosion resistance and red...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/02C22C38/04C22C38/22C22C38/24C22C38/26C22C38/44C22C38/46C22C38/48C21D1/32C21D1/18C21D9/52
Inventor 余子权姚赞金峰赵浩洋
Owner BAOSHAN IRON & STEEL CO LTD
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