को दस सामान्य शमन विधिहरूको सारांश उच्च फ्रिक्वेन्सी शमन मशीन (1)

1. Single medium (water, oil, air) quenching

Single medium (water, oil, air) quenching: Quenching the workpiece that has been heated to the quenching temperature into a quenching medium to cool it completely. This is a simpler quenching method and is often used for carbon and alloy steel workpieces with simple shapes. The quenching medium is selected according to the heat transfer coefficient, hardenability, size and shape of the parts.

2. डबल मध्यम शमन

Dual-medium quenching: The workpiece heated to the quenching temperature is first cooled to the Ms point in the quenching medium of a high-frequency heating machine with strong cooling capacity, and then transferred to the slow-cooling quenching medium to cool to room temperature to achieve different quenching cooling temperatures range, and has an ideal quenching cooling rate. It is used for complex shapes or large workpieces made of high carbon steel and alloy steel, and carbon tool steel is also mostly used in this method. Commonly used cooling media are water-oil, water-nitrate, water-air, oil-air. Generally, water is used as a quick-cooling quenching medium, oil or air is used as a slow-cooling quenching medium, and air is less used.

3. Martensite graded quenching

मार्टेन्सिटिक ग्रेडेड क्वेन्चिङ: स्टिललाई अस्टेनिटाइज गरिएको छ, र त्यसपछि उपयुक्त समयको लागि राखिएको स्टिलको माथिल्लो मार्टेन्स पोइन्टभन्दा अलि बढी वा कम तापक्रम भएको तरल माध्यम (साल्ट बाथ वा क्षार स्नान) मा डुबाइन्छ, र भित्री र बाहिरी स्टीलका भागहरू उपचार गरिन्छ। तह मध्यम तापक्रममा पुगेपछि, यसलाई हावा चिसोको लागि बाहिर निकालिन्छ, र सुपर कूल्ड अस्टेनाइट बिस्तारै मार्टेन्साइटको शमन प्रक्रियामा परिणत हुन्छ। यो सामान्यतया जटिल आकार र कडा विरूपण आवश्यकताहरु संग साना workpieces को लागी प्रयोग गरिन्छ, र उच्च गति इस्पात र उच्च मिश्र धातु इस्पात उपकरणहरु र मरहरु लाई पनि सामान्यतया यो विधि द्वारा बुझाइन्छ।

4. Martensite graded quenching method below Ms point

Martensitic graded quenching method below Ms point: When the bath temperature is lower than the Ms of the workpiece steel and higher than Mf, the workpiece cools faster in the bath, and the same result as the graded quenching can be obtained when the size is larger. Commonly used for larger size low hardenability steel workpieces.

5. Bainite isothermal quenching method

Bainite isothermal quenching method: The workpiece is quenched into a bath with the lower bainite temperature of the steel at an isothermal temperature, so that the lower bainite transformation occurs. Generally, it is kept in the bath for 30~60min. There are three main steps in the bainite isothermal quenching process: ① austenitizing treatment; ② cooling treatment after austenitizing;