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Heat treatment Q&A

背景
質問

What kind of Heat treatment is available?

Basically, there are three kinds; Salt Bath Furnace , Atmosphere Furnace (Antioxidation Atmosphere Furnace), and Vacuum Furnace for quenching Heat Treatment of High Speed Steel. For tempering, there are the Atmosphere Furnace and the Vacuum furnace.
MRT owns two kinds of heat treatment; Salt Bath Furnace and Antioxidation Atmosphere Furnace for quenching. Tempering is only pavailable by Atmosphere Furnace.

背景
質問

What are advantages of the Salt Bath Furnace heat treatment?

Enable to heat uniformly and in a short time. In addition by the high temperature melted-salt.
In addition, it can also keep consistent heat ⇒rapid heating ⇒rapid cooling by using several Salt Bath Furnaces and performs an ideal Heat Treatment which is suitable for each material's special properties. One of our company's attractive features is that we can handle your order regardless of the size.

背景
質問

What are advantages of Antioxidation Atmosphere Furnace?

Vacuum Furnaces heat only by radiant heat, on the other hand, Antioxidation Atmosphere Furnace heat by radiant heat and convective heat, so temperature irregularities do not occur and fabulous temperature distribution in the furnace. In addition, there is no time-lag of cooling and it is able to perform press quenching quickly to fix the warped products, so we can perform perfect heat treatment for even extremely thin manufacturing.

背景
質問

What kinds of materials are suitable for heat treatment?

Salt Bath Furnace

High Speed Steel (SKH), Die Steel (SKD), Martensitic Stainless Steel (SUS), Bearing Steel (SUJ), Alloy Tool Steels (SKS), Carbon Tool Steels (SK) and more.

Antioxidation Atmosphere Furnace

High Speed Steel(SKH), Die Steel(SKD), Martensitic Stainless Steel(SUS) and more.

背景
質問

What size and shapes are available for heat treatment?

Thick manufacturings are quenched by the Salt Bath Furnace. The processable amount is W250×L150×D300 and possibly up to 3kg of material by manual labor.
Small diameter, Thin pieces are quenched by Antioxidation Atmosphere Furnace. Processable amount for a basket is about W250×L550×D300

背景
質問

How long is the delivery time? (Is it possible to shorten the lead time?)

We normally deliver within 7 days after the supplied material arrives, but we are also able to expedite the process in case of urgent need within 2-3 days*. Please ask for details.
* It depends on the components and quantityto be treated.

背景
質問

What kind of inspection do we do?

We select samples randomly for examination of hardness and microstructure. The hardness is evaluated by Rockwell hardness C scale. When it is difficult to measure by Rockwell hardness C scale, we measure it by A scale or Superficial 30N, 15N, the result of examination as HRC conversion values to be offered.

背景
質問

Can specific examination be designated?

Basically, there are two kinds of examinations: hardness and microstructure examination, but we meet your requests as best we can.
For example, we are able to examine for broke-core of small diametrical bar and the warped manufacturing etc. include straightening.


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