TH30603B - Manufacturing process for the manufacture of rust-resistant angular blasting agents based on iron-chromium-carbon alloys. - Google Patents

Abstract

DC60 (05/04/44) This invention involves the manufacturing of a blasting agent which is rust resistant (>60 HRC) with sharp edges. Based on iron-chromium-carbon (Fe-Cr-C) based alloys, granules are based on iron-chromium-carbon based alloys. Hardened in such a process to > 60 HRC through heat treatment above 900°C under a reducing atmosphere, oxide-free solid material is obtained by this method. which can be crushed into grain (grain), which has sharp edges The result is a blasting agent with excellent properties for treating floors. surface of the workpiece which consists of materials that are stable to rust, such as stainless steel, non-ferrous metals and natural stone etc. This invention involves the manufacturing process of a blasting agent which is rust resistant (>60 HRC) with sharp edges. Based on iron-chromium-carbon (Fe-Cr-C) based alloys, granules are based on iron-chromium-carbon based alloys. Hardened in such a process to > 60 HRC through heat treatment above 900°C under a reducing atmosphere, oxide-free solid material is obtained by this method. which can be crushed into grain (grain), which has sharp edges The result is a blasting agent with excellent properties for treating floors. surface of the workpiece which consists of materials that are stable to rust, such as stainless steel, non-ferrous metals and natural stones, etc.

Claims (6)

1. Process for the production of blasting action beads from cast steel. High quality stainless steel, where, for the first time, coarse grain materials were produced from steel alloy forged materials. Chromium-Carbon that can be hardened , subsequently through the bead material to heat treatment at >900 ° C for hardening and then break it formed into granules with sharp edges, indicating that Thermal operations are performed in the atmosphere. reducing and that in particular Gases or reducing gas mixtures are used for subsequent cooling operations. 2. Process according to claim 1 that characterizes the reducing atmosphere as a gas. Mixtures containing hydrogen and nitrogen 3. Claim 1 process that specifies that the mixture gas contains hydrogen from 60 % to 80 % and nitrogen from 20 % to 40 % 4. Claim 1 process that characterizes that The forged material contains at least 2 % carbon and at least 30 % chromium. operation to make Coarse grain breakage is generated by means of a pulsating vibrating crusher, in particular a tubular back-and-forth module. Segmentation The pellets will be taken later. For the preparation of grain mixtures for the manufacture of rust-free cast stainless steel blasting agents, coarse grains are produced in First of all, the forged material is an iron-chromium-carbon alloy that can be hardened. after that Such coarse grains will have been through the operation It is heat treated for hardening and is subsequently crushed into sharp-edged pellets, characterized by such heat treatment being performed at >900°C in a reducing atmosphere. and reducing gas or a gas mixture will be used for the process. Cooling later as well. 2. The process according to Claim 1 is characterized by The reducing atmosphere is Mixture of gases with hydrogen and nitrogen. 3. The process according to Claim 2 is characterized by mixture between gases It contains 60% to 80% hydrogen and 20% to 40% nitrogen. 4. The process according to Claim 1 is characterized by Such forged materials have at least 2% carbon and at least 30% chromium 5. The process according to Claim 1 is characterized by Such coarse grains will It is grinded by pulsating milling, preferably by tubular back and forth milling. 6. The process according to Claim 1, which is characterized by Segment of The pellets will be treated later to correct the mixture between the granules.