Vacuum Heat Treatment of H13 Die Steel

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1.H13 mold steel how to heat treatment hardness can reach 58 HRC?

The first 1050 ~ 1100 degree heat quenching, oil quenching, can meet the requirements, but the general hot work die does not require such a high hardness, such a high hardness performance will be poor, not easy to use, generally around HRC46 ~ 50 performance Good and durable.

2. What is the surface of the mold after the heat treatment?

Questions added: the general mold are used to play with oilstone and then nitriding, nitriding back to use oilstone to black that layer of white, then polishing is very troublesome, do not wipe white Without a mirror, the material is H13, there are a lot of imported, if the syrup can wash white, then it can be directly polished.

(1) It can be cleaned with stainless steel pickling solution or hydrochloric acid. Sandblasting can also be used. Grinding the grinder costs a lot, and the amount of machining is large, and it is possible that the size is not up to standard. The oxide layer of high chromium die steel is more difficult to wash away. It should be possible to use stainless steel pickling solution, which is sold in abrasive shops or stainless steel shops.

(2)That kind can be. For H13, which contains relatively high chromium alloy steel, the oxide layer is difficult to wash off with hydrochloric acid. Since the mold has been rubbed, the surface is relatively smooth. In fact, it can be ground only with coarse whetstone, or sanded, and then heat treated. After returning, polish with fine whetstone. Or sandblasting, using 800-gauge boron carbide for sandblasting, you should be able to remove the black skin, and you don’t need to work too hard.

3. How does the heat treatment plant heat the metal?

The heat treatment plant has a lot of equipment. There are about box furnaces, pit furnaces and box furnaces. Most of the heat treatment can be done in this kind of processing, such as annealing, normalizing and quenching heating, tempering these common Heat treatment. In fact, it is an electrically heated furnace, which first raises the furnace to a predetermined temperature, then throws the workpiece in, waits for a period of time to a predetermined temperature, then keeps it warm for a while, and then removes it, or cools it together in the furnace. The pit furnace is generally As a carburizing treatment equipment, it is a furnace buried in the ground. After the work piece is put in, it is sealed. Then some carbon-rich liquid such as kerosene or methanol is dropped into the furnace, and then these liquids are decomposed into carbon atoms to infiltrate the workpiece at high temperature. surface.