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Thermal treatment method for high-nitrogen high-corrosion-resistance plastic mould steel

A technology of plastic mold steel and heat treatment method, applied in heat treatment equipment, manufacturing tools, quenching agent, etc., can solve the problems of high cost, unsatisfactory corrosion resistance, expensive alloy elements of plastic mold steel, etc., and achieve low production cost, durable The effect of excellent corrosion performance

Active Publication Date: 2018-12-18
CHENGDU ADVANCED METAL MATERIALS IND TECH RES INST CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem solved by the invention is that plastic mold steel has high cost and unsatisfactory corrosion resistance due to expensive alloy elements

Method used

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  • Thermal treatment method for high-nitrogen high-corrosion-resistance plastic mould steel
  • Thermal treatment method for high-nitrogen high-corrosion-resistance plastic mould steel
  • Thermal treatment method for high-nitrogen high-corrosion-resistance plastic mould steel

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] The die steel in Example 1 is obtained by forging a steel ingot, the cross-sectional size is 100mm (thick) × 600mm (wide), and the chemical composition of the die steel is C 0.37%, Si 0.32%, Mn 0.55%, Cr 13.3%, Ni 0.18% , Mo 0.06%, N0.07%, P 0.022%, S 0.004%, and the rest is Fe.

[0031] (1) Spheroidizing annealing

[0032] Put the mold steel from room temperature into the annealing furnace, raise the temperature to 960°C at a rate of 100°C / h, keep it for 10 hours, then cool it to 740°C at a cooling rate of 40°C / h, keep it for 7 hours, and finally, heat it at 40°C / h The cooling rate is cooled to 500°C, and the furnace is air-cooled to room temperature. The obtained metallographic structure is as follows: figure 1 shown.

[0033] (2) Salt bath quenching

[0034] Put the spheroidized annealed die steel obtained in step (1) into the quenching furnace at room temperature, and raise the temperature to 750±10°C at a rate of 100°C / h, keep it warm for 3.5h, and continue to p...

Embodiment 2

[0039] In Example 2, the die steel is obtained by forging a steel ingot, the section size is 100 mm (thick) × 600 mm (wide), and the chemical composition of the die steel is C 0.33%, Si 0.320%, Mn 0.52%, Cr 13.8%, Ni 0.16% , Mo 0.05%, N0.065%, P 0.022%, S 0.004%, and the rest is Fe.

[0040] (1) Spheroidizing annealing

[0041] Put the mold steel from room temperature into the annealing furnace, raise the temperature at a rate of 90 °C / h to 950 °C, keep it for 9 hours, then cool it at a cooling rate of 40 °C / h to 740 °C, keep it for 6 hours, and finally, at 40 °C / h The cooling rate is cooled to 500°C, and the furnace is air-cooled to room temperature. The obtained metallographic structure is as follows: figure 1 shown.

[0042] (2) Salt bath quenching

[0043] Put the spheroidized annealed die steel obtained in step (1) into the quenching furnace at room temperature, and raise the temperature to 750±10°C at a rate of 90°C / h, keep it warm for 3.5h, and continue to press 90°C / h...

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Abstract

The invention relates to a thermal treatment method for high-nitrogen high-corrosion-resistance plastic mould steel, and belongs to the technical field of metal material thermal treatment. In order tosolve the technical problems that the plastic mould steel is high in cost and is unsatisfactory in corrosion resistance as alloy elements are dear, the technical scheme adopted by the invention provides the thermal treatment method for high-nitrogen high-corrosion-resistance plastic mould steel. The thermal treatment method comprises the steps of spheroidizing annealing, salt bath quenching, andtempering distributing, wherein element distribution is completed at a tempering stage. The mould steel consists of the following chemical elements in percentage by weight: 0.35-0.45% of C, 0.3-0.5% of Si, 0.3-0.6% of Mn, 13.0-14.0% of Cr, 0.05-0.08% of Mo, and 0.06-0.08% of N. The thermal treatment method can obtain plastic mould steel with excellent mechanical property and excellent corrosion resistance. The mould steel treated by the thermal treatment process is relatively high in nitrogen content, is low in content of corrosion-resistant elements such as Cr and Mo, and is low in productioncost.

Description

technical field [0001] The invention belongs to the technical field of heat treatment of metal materials, and in particular relates to a heat treatment method for high-nitrogen and high-corrosion-resistant plastic mold steel. Background technique [0002] With the rapid development of petrochemical technology in the past half century, the output of plastics has increased rapidly. Together with steel, wood and cement, plastics constitute the four basic materials of modern society. A large number of plastic products need to be molded in the production process, which has greatly promoted the development of the mold industry. Mold material is the key factor affecting the quality, performance and service life of the mold, and it is also a very important part of the development of the mold industry. Plastic abrasive steel is a kind of mold steel used for plastic production. Plastic mold materials are still dominated by mold steel. The development of mold steel has promoted the d...

Claims

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Application Information

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IPC IPC(8): C21D1/18C21D1/32C21D1/607C21D6/00C22C38/02C22C38/04C22C38/22
CPCC21D1/18C21D1/32C21D1/607C21D6/002C21D6/005C21D6/008C22C38/001C22C38/02C22C38/04C22C38/22
Inventor 肖强李俊洪罗许刘序江
Owner CHENGDU ADVANCED METAL MATERIALS IND TECH RES INST CO LTD
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