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Treatment method of die material for high-strength forging

A technology of mold material and processing method, which is applied in the field of mold steel manufacturing, can solve problems such as short life and cracks, and achieve the effects of improving life, strengthening dispersion effect, and improving service life

Active Publication Date: 2016-10-26
MAANSHAN ZHIYUAN FORGING CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] In view of the fact that the performance requirements of forging blanks are getting higher and higher, and the mold materials and processing methods in the prior art have defects such as cracks and short life in the forging process, the present invention provides a mold for high-strength forging The processing method of the material, the mold after forging has no cracks, the grain size is fine, and the service life is prolonged

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] A mold material for high-strength forging, its constituent elements and weight percentages are: C: 0.36%; Si: 0.50%; P≤0.035%; S≤0.010%; Cr: 7.6%; Mo: 4.7%; V : 2.6%; the rest is Fe.

[0028] The preparation method of the mold material for high-strength forging, the steps are:

[0029] 1) The raw materials are prepared according to the formula of C: 0.36%; Si: 0.50%; P≤0.035%; S≤0.010%; Cr: 7.6%; Mo: 4.7%; V: 2.6%; the rest is Fe to prepare the blank;

[0030] 2) Smelting Φ300 electroslag ingot according to the formula, 342mm length of the 190KG blanking material is put into the furnace for heating, the first step is to forge along the direction of the steel ingot to 600*200*200mm; the second step is to forge the direction of the steel ingot to 400*250* 220mm; the third step is to forge the steel ingot in the same direction to 700*225*125mm; to obtain the forged blank;

[0031] 3) Preheat the forged blank obtained in step 2) to 500°C, keep it warm for 40 minutes, then...

Embodiment 2

[0035] Same as Example 1, the difference is that the constituent elements and weight percentage of the test material are: C: 0.37%; Si: 0.40%; P≤0.035%; S≤0.010%; Cr: 7.1%; Mo: 5.0%; V: 2.1%; the rest is Fe; 1) Smelting Φ300 electroslag ingot according to the formula; 2) Blanking 210KG about 378mm long into the furnace for heating, the first step is to forge 600*215*215mm along the direction of the steel ingot, the second step, Forging the steel ingot with the same direction to 400*250*250mm, the third step is to forge the steel ingot with the same direction to Φ308*280*280mm; get the blank after forging; step 3) Preheat the blank to 450°C, hold it for 55min, and then heat it to 850 DEG C, heat preservation 60min; Then heat to 1050 DEG C, heat preservation 50min, heating rate is controlled at 30 DEG C / min quenching, quenching is water quenching, and water quenching adopts the quenching agent in the patent No. 201310350402.X embodiment 2; step 4) In the process, the workpiece w...

Embodiment 3

[0037]Same as Example 1, the difference is that the constituent elements and weight percentage of the test material are: C: 0.38%; Si: 0.30%; P≤0.035%; S≤0.010%; Cr: 6.8%; Mo: 5.4%; V: 1.8%; the rest is Fe; 1) smelting Φ300 electroslag ingot according to the formula, 2) blanking 160KG about 288mm long into the furnace for heating, the first step is to forge 600*225*150mm along the direction of the steel ingot, the second step, Forge the steel ingot with the same direction to 400*300*160mm, the third step is to forge the steel ingot with the same direction to 555*255*125mm; get the blank after forging; step 3) Preheat the blank to 450°C, keep it warm for 70min, and then heat it to 860 ℃, heat preservation 40min; Then be heated to 1030 ℃, heat preservation 60min, heating rate is controlled at 26 ℃ / min; Quenching is water quenching, and water quenching adopts patent No. to be the quenching agent in 201310350402.X embodiment 2; Step 4) will The workpiece was heated to 550°C, held ...

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Abstract

The invention discloses a treatment method of a die material for high-strength forging and belongs to the field of die steel. The invention is a divisional application with original Chinese patent application number being 201510164362.9. The treatment method includes the steps of: 1) smelting electroslag steel ingots according to formula and forging a green blank; 2) performing machining; 3) heating the work piece to 1030-1080 DEG C and quenching the work piece; and 4) heating the work piece to 400-550 DEG C. Through second phase strengthening and dispersion strengthening, the die material is reduced in cracking tendency, so that the treatment method is beneficial to forging process, can improve anti-fatigue performance of the work piece and also prolongs the service life of the work piece.

Description

[0001] This invention is a divisional application, the original Chinese patent application number: 201510164362.9, application date: April 8, 2015, patent name at the time of application: an environmentally friendly water-soluble quenching agent and its manufacturing method. technical field [0002] The invention belongs to the field of die steel manufacturing, and in particular relates to a method for processing die materials used for high-strength forging. Background technique [0003] Die steel is a type of steel used to make molds such as cold stamping dies, hot forging dies, and die casting dies. The quality of the mold directly affects the quality of the pressure processing process, the precision output of the product and the production cost, while the quality and service life of the mold are mainly affected by the mold material itself and the heat treatment process in addition to the reasonable structural design and processing accuracy. [0004] Die steel can be rough...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/18C22C38/12C22C38/02C21D1/18C21D1/74
CPCC21D1/18C21D1/74C22C38/02C22C38/12C22C38/18
Inventor 张道恩
Owner MAANSHAN ZHIYUAN FORGING CO LTD
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