فولاذ الأدوات 5Cr3Mn1SiMo1V

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5Cr3Mn1SiMo1V is a grade under the Chinese GB standard, representing a high-toughness, impact-resistant tool steel. Its equivalent steels include AISI/ASTM س7 in the United States and DIN W-Nr. 1.2355 in Germany.

1. Chemical Composition(GB/ 1299-2000)

جسيمنكرشهرالخامسصس
0.45-0.55%0.20-1.00%0.20-0.90%3.00-3.50%1.30-1.80%≤0.35%≤0.030%≤0.030%

2. 5Cr3Mn1SiMo1V Steel Forging Process Specification

غرضدرجة حرارة التسخين (°م)Initial Forging Temp (°C)Final Forging Temp (°C)طريقة التبريد
سبيكة فولاذية1120 – 11501150 – 1200900التبريد البطيء
سبائك الصلب1150 – 12001000 – 1150850التبريد البطيء

3. 5Cr3Mn1SiMo1V Steel Heat Treatment Process Specification

3.1 التسخين المسبق

خطة المعالجة الحرارية الأوليةمعلمات العملية
التلدين المتساوي الحرارة بعد التشكيلHeating Temp: 800-820°C, Soak: 2-3h, Isothermal Temp: 700-720°C, Soak: 3-5h, furnace cool to 550°C then air cool, Hardness after annealing ≤229 HBW
التلدين العام بعد التشكيلHeating Temp: 800-820°C, Soak: 2-3h, furnace cool to 550°C then air cool, Hardness after annealing ≤229 HRC

3.2 Quenching and Tempering

مواصفات التبريدمواصفات التلطيف
Quenching Temp (°C)طريقة التبريدصلابة HRCدرجة حرارة التقسية (درجة مئوية)صلابة HRC
940 – 955التبريد بالهواء أو الزيت56160 – 18056 – 58

4. Mechanical Properties of 5Cr3Mn1SiMo1V

5Cr3Mn1SiMo1V steel is a high-impact-resistant tool steel. Its elevated chromium content enhances hardenability. Silicon and manganese improve strength and resistance to tempering. Molybdenum and vanadium refine the grain structure, further increasing hardenability and elevating the steel’s overall performance. Additionally, with a chromium content exceeding 2.5% by mass, this steel exhibits excellent resistance to hydrogen embrittlement and oxidation at moderate temperatures.

5. التطبيقات

5Cr3Mn1SiMo1V steel exhibits high toughness and moderate oxidation resistance at elevated temperatures, making it suitable for manufacturing tools and dies that operate under high impact loads. It is also well-suited for producing hammer forging dies and similar applications.

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