1045 Carbon Steel

One. Product Description

1045 Steel is commonly used high-quality carbon structural steel, also known as "45" steel, corresponding to Japanese standard S45C, American standard 1045, and German standard C45. It is characterized by higher strength and deformation resistance than ordinary A3 steel, and 45 steel is widely used in industrial machinery.

Two. Quality Standard

ASTM A29/A29M-04 Standard Specification

Three. Product Specifications

Four. Equivalent Grade of 1045 Carbon Steel - For Reference Only

Five. Product Features and Uses

Features:

1.1045 steel has general cold plasticity.

2. Has higher strength and better maneuverability.

3. It also has certain toughness, plasticity and wear resistance.

3. Has good mechanical properties.

Use:

1.1045 Compared with AISI 1020, AISI 1045 has a low alloy content, but can obtain high strength through flame or induction hardening, and is widely used in many industries that require high strength and wear resistance.

2. Typical applications include axles, bolts, connecting rods, hydraulic clamps, plungers, pins, rollers, studs, shafts, mandrels, mandrels, sleeves, light gears, etc.

Six. Product Detailed Information

45 steel is widely used in machinery, without heat treatment: HB≤229.

Heat treatment: normalizing; impact energy: AKU≥39J.

High strength, good plasticity and toughness, the hardness of 45 steel before quenching and tempering is higher than HRC55 (up to HRC62), and the tempering after heat treatment can reach HRC42-46. Good mechanical properties, but also to obtain surface hardness requirements. It is suitable for the manufacture of small cross-section quenched and tempered parts, load-resistant, large normalized parts, low stress, and surface quenched parts that do not require high strength. Core, such as tips, guide posts, hands and other parts.

The cold plasticity of 45 steel is general, and annealing and normalizing are slightly better than quenching. It has higher strength and better maneuverability. After proper heat treatment, certain toughness, plasticity and wear resistance can be obtained. Convenient source of material. Suitable for hydrogen welding and argon arc welding, but not suitable for gas welding. Preheating is required before welding, and stress relief annealing should be performed after welding.

Normalizing can improve the cutting performance of blanks with hardness less than 160HBS. After quenching and tempering treatment, its comprehensive mechanical properties should reach the best level of other medium carbon structural steels, but the hardenability of the steel is low. The critical quenching diameter in water is 12-17mm, and there is a tendency to crack during water quenching. When the diameter is greater than 80mm, the mechanical properties after quenching and tempering or normalizing are similar. After quenching and tempering of small and medium-sized mold parts, high strength and toughness can be obtained. For large parts, standardization is appropriate. Therefore, this steel is usually used in the quenched and tempered or normalized state. 45 steel is a high-quality carbon structural steel with low hardness and easy machining. Molds are usually used to make templates, tips, guide posts, etc. The quenched and tempered parts have good comprehensive mechanical properties and are widely used in various important structural parts, especially connecting rods, bolts, gears and shafts that work with Swedish staggered grades. 1650, French C5, Japanese S45C steel tools, etc.

Nitriding Treatment:

It is generally used for heavy-duty parts with surface wear resistance and core impact resistance, and its wear resistance is higher than that of quenching and tempering + surface quenching. The surface carbon content is 0.8-1.2%, and the core is generally 0.1-0.25% (0.35% in special cases). After heat treatment, the surface hardness can reach 58-62HRC, the core hardness is low, and the impact resistance is low. After quenching, hard and brittle martensite will appear in the core, losing the advantage of carburizing. The carbon content of the material using the carburizing process is not high, and the core strength can reach a high level of 0.30%, which is rare in applications. There is no example of 0.35%, the process of quenching and tempering + high-frequency surface quenching can be used, and the wear resistance is slightly worse than that of carburizing.

Cold-Pressed Rough Embryo Softening Treatment:

The temperature is 740-760°C, the holding time is 4-6h, the cooling rate is 50-100C/h, and the temperature is lowered to ≤600°C with the furnace.

Normalized Specifications:

The normalizing temperature is 850-870℃, and the hardness after normalizing is 170-217HBS.

Tempering Treatment:

Quenching temperature 840±10℃, water-cooled quenching; tempering temperature 600±10℃, air cooling outside the furnace. 45 steel does not use the heat treatment process of carburizing and quenching.