1. Name
1Cr13 is called AISI410 in the United States, SUS410 in Japan, and X15Cr13 in the German DIN standard
2. Overview
1Cr13 It is a martensitic stainless steel, and 1Cr13 steel is a semi-martensitic stainless steel. In addition to the martensite structure after quenching, there is still a ferrite structure. After quenching and tempering, 1Cr13 has high strength, toughness, good corrosion resistance and cold deformation ability, and has good vibration damping performance. Usually the steel is used in the quenched and tempered state. The tempering is high temperature tempering and low temperature tempering. Tempering at a temperature of 370~560℃ should be avoided to ensure the good performance of the steel. Low-temperature tempering can eliminate the internal stress formed during the quenching process, and high-temperature tempering can obtain excellent comprehensive mechanical properties while ensuring good corrosion resistance. 1Cr13 is mainly used for components subject to impact loads that require high toughness and stainless properties, such as blades, hydraulic press valves, fasteners, thermal cracking and sulfur corrosion-resistant equipment and components. It is mainly used in early stage reactors for 2nd and 3rd stage auxiliary pump drive shafts, evaporator supports, control rod driving mechanisms, etc.
3. Variety and usage conditions
Hot-rolled and forged bars, cold-drawn bars, plates and strips
4. Chemical composition
Carbon?C?: ≤0.15
Silicon?Si: ≤1.00
Manganese?Mn: ≤1.00
Liu ?S?: ≤ 0.030?
Phosphorus ?P?: ≤0.035?
Chromium ?Cr: 11.50～13.50?
V. Physical and chemical properties
1. Density g/cm?: 7.77
2. Melting temperature: 1430℃
3. Anti-oxidation and anti-corrosion properties
1Cr13 steel appears The starting temperature of strong oxidation is 750℃. 1Cr13 steel is stainless and has certain corrosion resistance in dilute acids and weak organic acids at room temperature.
6. Processing performance and welding process
1Cr13 steel has good cold plasticity, deep drawing, polishing and cutting properties. 1Cr13 has good welding performance, and its welding performance is similar to that of 0cr13. It can be welded with 0Cr13 or Austrian 107 or Austrian 207 electrodes. In order to prevent cold cracks in the welded joint, it should be preheated before welding. The preheating temperature is 200~300℃. Good performance can be obtained by heat treatment at 700~750℃ after welding. Use austenitic welding materials for welding, and heat treatment after welding is not required. In order to improve the strength, the weld should be annealed when it needs to be machined after welding.
7. Scope and purpose of use
1Cr13 steel is mainly used for parts that are resistant to weak corrosive media and require high toughness and impact loads, such as turbine blades and hydraulic press valves. , structural frame, bolts, nuts, etc. In the fan reactor environment, it is mainly used for 2nd and 3rd stage auxiliary pump drive shafts, evaporator supports, control rod drive mechanisms, etc.
Precipitation hardened martensitic stainless steel:
1. Designed for forming under solution annealing conditions
2. Can be hardened by heat treatment
3. Contains chromium and nickel as main alloy elements
4. Corrosion resistance is usually better than straight chromium ferrite
Mechanical properties:
Tensile strength σb (MPa): quenching and tempering, ≥540
Conditional yield strength σ0.2 (MPa): quenching and tempering, ≥345
Elongation δ5 () : Quenching and tempering, ≥25
Reduction of area ψ (): Quenching and tempering, ≥55
Impact energy Akv (J): Quenching and tempering, ≥78
Hardness: annealed, ≤200HB; quenched and tempered, ≥159HB