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A cast dendrite corrosion agent for hot work die steel h13

A corrosive, as-cast technology, which is applied in the preparation of test samples, the improvement of process efficiency, instruments, etc., can solve the problems of insignificant dendrite corrosion effect, long operation time and high corrosion efficiency of hot work die steel H13. The method of use is simple, the effect of slowing down the corrosion rate and improving the corrosion efficiency

Active Publication Date: 2022-06-07
NORTHEASTERN UNIV LIAONING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a cast dendrite etchant for hot work die steel H13 and its application method. The cast dendrite etchant provided by the present invention can clearly and effectively corrode dendrite structure, and the corrosion efficiency is high. Solved the problem that other corrosive agents have been used for a long time and have no obvious effect on hot work die steel H13 dendrite corrosion

Method used

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  • A cast dendrite corrosion agent for hot work die steel h13
  • A cast dendrite corrosion agent for hot work die steel h13
  • A cast dendrite corrosion agent for hot work die steel h13

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] Stir 120mL of distilled water, 8.55mL of sulfuric acid solution, 16.8mL of nitric acid solution, 2.2g of ferric chloride, 2.18g of magnesium chloride, 3.38g of zinc chloride and 1.57g of sodium dodecylbenzenesulfonate (stirring rate is 50r / min, The stirring time is 3min), and it is allowed to stand for 7min to obtain the as-cast dendritic etchant for hot work die steel H13; wherein, the mass concentration of sulfuric acid solution is 70%, and the mass concentration of nitric acid solution is 65%.

Embodiment 2

[0057] Stir 120mL of distilled water, 17.2mL of nitric acid solution, 9.27mL of sulfuric acid solution, 2.4g of ferric chloride, 2.34g of magnesium chloride, 2.24g of zinc chloride and 1.84g of sodium dodecylbenzenesulfonate (stirring rate is 60r / min, The stirring time is 2min), and it is allowed to stand for 6min to obtain the as-cast dendritic etchant for hot work die steel H13; wherein, the mass concentration of the sulfuric acid solution is 70%, and the mass concentration of the nitric acid solution is 65%.

Embodiment 3

[0063] Stir 120 mL of distilled water, 9.7 mL of sulfuric acid solution, 17.4 mL of nitric acid solution, 2.66 g of ferric chloride, 2.37 g of magnesium chloride, 4.15 g of zinc chloride and 2.17 g of sodium lauryl sulfate (stirring rate is 55 r / min, stirring time For 2min), let stand for 5min to obtain the as-cast dendritic etchant for hot work die steel H13; wherein, the mass concentration of sulfuric acid solution is 75%, and the mass concentration of nitric acid solution is 68%.

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Abstract

The invention provides an as-cast dendrite corrosion agent for hot work die steel H13, which comprises water, nitric acid solution, sulfuric acid solution, surfactant, magnesium chloride, ferric chloride and zinc chloride. The present invention uses highly corrosive nitric acid solution and sulfuric acid solution as main components, which can clearly and effectively corrode dendrite structure; adding a certain amount of magnesium chloride, ferric chloride and zinc chloride can make the hot work die steel H13 Elements such as Cr and Fe are preferentially desolvated, and chloride ions have a significant effect on the corrosion of metals, which is conducive to improving the corrosion efficiency of the etchant; the use of surfactants can slow down the corrosion rate to avoid excessive corrosion that affects the corrosion effect. The results of the examples show that after using the as-cast dendrite etchant provided by the present invention to corrode the hot work die steel H13, the well-developed cross dendrites of the die steel H13 can be clearly observed, and the secondary dendrite spacing can be measured.

Description

technical field [0001] The invention relates to the technical field of metallographic analysis of the dendritic structure of a billet, in particular to an as-cast dendritic corrosive agent for hot work die steel H13 and a method for using the same. Background technique [0002] Mold is an extremely important and very special basic process equipment in industrial production. It is known as the "mother of modern industry". Mold manufacturing is an important part of the manufacturing industry and one of the important symbols to measure the national manufacturing level. As the second generation hot work die steel, H13 has excellent comprehensive properties, such as excellent thermal stability, high temperature strength, high temperature hardness, resistance to liquid metal erosion, etc. It can be used to prepare hot extrusion and die casting molds, etc., and is the most widely used A typical mold steel grade. With the pursuit of lightness, thinness, environmental protection, hi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N1/32G01N1/28G01N1/34C23F1/28C22C38/02C22C38/04C22C38/22C22C38/24
CPCG01N1/32G01N1/286G01N1/34G01N1/28C23F1/28C22C38/02C22C38/04C22C38/22C22C38/24G01N2001/2866Y02P10/20
Inventor 李花兵朱红春王剑飞冯浩姜周华何志禹张树才
Owner NORTHEASTERN UNIV LIAONING