As-cast dendritic crystal corrosive agent for hot work die steel H13 and use method thereof

Abstract

The invention provides an as-cast dendritic crystal corrosive agent for hot work die steel H13. The as-cast dendritic crystal corrosive agent comprises water, a nitric acid solution, a sulfuric acid solution, a surfactant, magnesium chloride, ferric chloride and zinc chloride. According to the invention, the nitric acid solution and the sulfuric acid solution with strong corrosivity are used as main components, so that the dendritic structure can be clearly and effectively corroded; then a certain amount of magnesium chloride, ferric chloride and zinc chloride are added, elements such as Cr and Fe in the hot work die steel H13 can be desolventized preferentially, chloride ions have a remarkable effect on metal corrosion, and thus the corrosion efficiency of the corrosive agent can be improved; and the use of the surfactant can slow down the corrosion rate so as to avoid the influence of too fast corrosion on the corrosion effect. The result of the embodiment shows that after the hot work die steel H13 is corroded by adopting the as-cast dendritic crystal corrosive agent provided by the invention, developed cross dendrites of the die steel H13 can be clearly observed, and the secondary dendritic crystal spacing can be measured.

Description

technical field [0001] The invention relates to the technical field of metallographic analysis of billet dendrite structure, in particular to an as-cast dendrite etchant for hot work die steel H13 and a use method thereof. 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 level of national manufacturing. As the second generation of hot work die steel, H13 has excellent comprehensive properties, such as excellent thermal stability, high temperature strength, high temperature hardness, liquid metal erosion resistance, 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, high performance and beau...

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

Images