Forming method of high-speed tool steel bar

A high-speed tool steel and forming method technology, applied in the direction of metal extrusion dies, etc., can solve the problems that the process method and equipment configuration cannot meet the product quality requirements, low production efficiency, discontinuous production, etc.

Pending Publication Date: 2021-12-31
HANDAN XINXING SPECIAL TUBING CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the common problem in the existing rod and wire production lines is that the wire rods of different specifications are all produced on o...

Method used

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  • Forming method of high-speed tool steel bar
  • Forming method of high-speed tool steel bar
  • Forming method of high-speed tool steel bar

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Embodiment Construction

[0027] The present invention will be described in detail below in conjunction with the embodiments and the accompanying drawings. The protection scope of the present invention is not limited to the embodiments, and any changes made by those skilled in the art within the scope defined in the claims also belong to the protection scope of the present invention.

[0028] The high-speed tool steel bar stock of the present invention is formed by a hot extrusion method, and the production system for forming the high-speed tool steel bar stock is used for forming production. The material of high-speed tool steel is W6Mo5Cr4V2 in GB / T9943, and the bar product specification is φ120mm (outer diameter).

[0029] Production systems for high-speed tool steel bar forming such as figure 1 As shown, it includes machining equipment 1, double alloy billet preparation equipment 2, double alloy billet processing equipment 3, resistance furnace 4, electromagnetic induction furnace 5, extrusion mac...

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Abstract

The invention relates to a forming method of a high-speed tool steel bar. The forming method comprises the following forming steps: (1) calculating the size of a double-alloy blank; (2) smelting a high-speed tool steel casting blank; (3) producing an austenitic steel seamless steel pipe; (4) performing sawing and segmenting; (5) machining the raw materials; (6) preparing a double-alloy blank; (7) vacuumizing the double-alloy blank; (8) processing the double-alloy blank; (9) heating to 1120 DEG C; (10) performing electromagnetic induction heating at 1150-1160 DEG C; (11) performing double-alloy extrusion forming; (12) performing annealing; (13) performing pressure straightening; and (14) removing outer austenitic steel, and manufacturing the high-speed tool steel bar. The double-layer blank is prepared and formed through the hot extrusion process, the defects that high-speed steel is high in heat dissipation speed, poor in plasticity and prone to oxidation at high temperature, and extrusion cracking is caused are overcome, and the qualified rate of products is increased.

Description

technical field [0001] The invention belongs to the technical field of steel forming production, and relates to a forming method of high-speed tool steel bars. Background technique [0002] Due to the existence of coarse network eutectic carbides in the high-speed steel ingot after smelting, the steel becomes brittle. This kind of coarse eutectic carbide cannot be eliminated by heat treatment, but can only be broken by plastic deformation. High-speed steel has high alloy content, poor thermoplasticity, and narrow thermal processing temperature range. The existing mature manufacturing technology is: using forging technology, through upsetting and elongation to break the carbides, and realize the small size and uniform distribution of the carbides to obtain the material. High hardness and good toughness. However, the forging process produces a small amount of deformation in a single pass, and requires multiple processing times to reach the finished product size. The producti...

Claims

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Application Information

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IPC IPC(8): B21C25/02B21C29/04
CPCB21C25/02B21C29/04Y02P10/25
Inventor 王锦永齐希伦刘静张艳
Owner HANDAN XINXING SPECIAL TUBING CO LTD
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