A continuous forging production process for cylindrical parts

Abstract

The invention relates to a continuous forging production process of cylindrical parts, belonging to the technical field of steel ingot processing. The method comprises the following steps: (1) raw material preparation; (2) heating; (3) forging; (4) cooling after forging; (5) heat treatment after forging; (6) sawing. In the present invention, the raw material steel ingots are replaced by hot steel ingots, and then through the control of the production process parameters, the production process of continuous forging is adopted to produce cylindrical parts with a length of 4 to 7 meters, and then according to requirements, sawing into Multiple pieces, get product. With this manufacturing method, the production cost can be effectively reduced and the production efficiency can be improved.

Description

technical field

[0001] The invention belongs to the technical field of steel ingot processing, and in particular relates to a production process for continuous forging of cylindrical parts. Background technique

[0002] The existing production method of tubular parts is single-piece production, and the raw material steel ingot used is cold steel ingot. The current production technology is to first raise the temperature of the cold steel ingot to 650°C at a rate of ≤60°C per hour, and keep it for 0.5 hours at a cross-section of 100mm; Finally, heat it to 1240~1260°C according to the power, and keep it warm for 0.8 hours according to the cross-section of 100mm, to fully heat the steel ingot. This process has problems such as slow heating rate, long heat preservation time, and large energy consumption. The steel ingot after heating needs to go through the processes of cross nozzle riser, upsetting, punching, hole reaming, mandrel elongation, horse frame reaming, flattening, a...

Examples

Embodiment 1

[0036] A continuous forging production technology of carbon structural steel (45# Φ1300×Φ970×800 3.7 tons) cylindrical parts, the specific operation is as follows:

[0037] (1) Raw material preparation: According to the chemical composition, mechanical properties, flaw detection standards, dimensions of each part, and utilization rate requirements of the workpiece, select 45#, 4 pieces of continuous forging, the weight of the steel ingot is 18.9t, and the surface temperature of the steel ingot is 650°C .

[0038] (2) Heating:

[0039] a. The hot steel ingot is heated to 650°C according to the maximum power and kept for 2 hours;

[0040] b. The hot steel ingot is heated to 850°C according to the maximum power and kept for 2 hours;

[0041] c. The hot steel ingot is heated to 1250°C according to the maximum power and kept for 5 hours.

[0042] (3) Forging:

[0043] a. Wrong nozzle and riser: The wrong nozzle is about 3% of the weight of the steel ingot, and the wrong riser i...

Embodiment 2

[0057] A continuous forging production technology for die steel (5CrNiMo Φ1300×Φ970×800 3.7 tons) cylindrical parts, the specific operation is as follows:

[0058] (1) Raw material preparation: According to the chemical composition, mechanical properties, flaw detection standards, dimensions of each part, and utilization rate requirements of the workpiece, 5CrNiMu is selected, 4 pieces of continuous forging, the weight of the steel ingot is 18.9t, and the surface temperature of the steel ingot is 650 °C.

[0059] (2) Heating:

[0060] a. The hot steel ingot is heated to 650°C with the maximum power and kept for 2 hours.

[0061] b. The hot steel ingot is heated to 850°C with the maximum power and kept for 2 hours.

[0062] c. The hot steel ingot is heated to 1230°C according to the maximum power and kept for 5 hours.

[0063] (3) Forging:

[0064] a. Wrong nozzle and riser: The wrong nozzle is about 3% of the weight of the steel ingot, and the wrong riser is about 10% of th...

Embodiment 3

[0078] A continuous forging production technology for alloy structural steel (42CrMo Φ1300×Φ970×800 3.7 tons) cylindrical parts, the specific operation is as follows:

[0079] (1) Raw material preparation: According to the chemical composition, mechanical properties, flaw detection standards, dimensions of each part, and utilization rate requirements of the workpiece, 42CrMo is selected, 4 pieces of continuous forging, the weight of the steel ingot is 18.9t, and the surface temperature of the steel ingot is 650 °C.

[0080] (2) Heating:

[0081] a. The hot steel ingot is heated to 650°C with the maximum power and kept for 2 hours.

[0082] b. The hot steel ingot is heated to 850°C with the maximum power and kept for 2 hours.

[0083] c. The hot steel ingot is heated to 1250°C according to the maximum power and kept for 5 hours.

[0084] (3) Forging:

[0085] a. Wrong nozzle and riser: The wrong nozzle is about 3% of the weight of the steel ingot, and the wrong riser is abou...

technical field

[0001] The invention belongs to the technical field of steel ingot processing, and in particular relates to a production process for continuous forging of cylindrical parts. Background technique

[0002] The existing production method of tubular parts is single-piece production, and the raw material steel ingot used is cold steel ingot. The current production technology is to first raise the temperature of the cold steel ingot to 650°C at a rate of ≤60°C per hour, and keep it for 0.5 hours at a cross-section of 100mm; Finally, heat it to 1240~1260°C according to the power, and keep it warm for 0.8 hours according to the cross-section of 100mm, to fully heat the steel ingot. This process has problems such as slow heating rate, long heat preservation time, and large energy consumption. The steel ingot after heating needs to go through the processes of cross nozzle riser, upsetting, punching, hole reaming, mandrel elongation, horse frame reaming, flattening, a...

Examples

Embodiment 1

[0036] A continuous forging production technology of carbon structural steel (45# Φ1300×Φ970×800 3.7 tons) cylindrical parts, the specific operation is as follows:

[0037] (1) Raw material preparation: According to the chemical composition, mechanical properties, flaw detection standards, dimensions of each part, and utilization rate requirements of the workpiece, select 45#, 4 pieces of continuous forging, the weight of the steel ingot is 18.9t, and the surface temperature of the steel ingot is 650°C .

[0038] (2) Heating:

[0039] a. The hot steel ingot is heated to 650°C according to the maximum power and kept for 2 hours;

[0040] b. The hot steel ingot is heated to 850°C according to the maximum power and kept for 2 hours;

[0041] c. The hot steel ingot is heated to 1250°C according to the maximum power and kept for 5 hours.

[0042] (3) Forging:

[0043] a. Wrong nozzle and riser: The wrong nozzle is about 3% of the weight of the steel ingot, and the wrong riser i...

Embodiment 2

[0057] A continuous forging production technology for die steel (5CrNiMo Φ1300×Φ970×800 3.7 tons) cylindrical parts, the specific operation is as follows:

[0058] (1) Raw material preparation: According to the chemical composition, mechanical properties, flaw detection standards, dimensions of each part, and utilization rate requirements of the workpiece, 5CrNiMu is selected, 4 pieces of continuous forging, the weight of the steel ingot is 18.9t, and the surface temperature of the steel ingot is 650 °C.

[0059] (2) Heating:

[0060] a. The hot steel ingot is heated to 650°C with the maximum power and kept for 2 hours.

[0061] b. The hot steel ingot is heated to 850°C with the maximum power and kept for 2 hours.

[0062] c. The hot steel ingot is heated to 1230°C according to the maximum power and kept for 5 hours.

[0063] (3) Forging:

[0064] a. Wrong nozzle and riser: The wrong nozzle is about 3% of the weight of the steel ingot, and the wrong riser is about 10% of th...

Embodiment 3

[0078] A continuous forging production technology for alloy structural steel (42CrMo Φ1300×Φ970×800 3.7 tons) cylindrical parts, the specific operation is as follows:

[0079] (1) Raw material preparation: According to the chemical composition, mechanical properties, flaw detection standards, dimensions of each part, and utilization rate requirements of the workpiece, 42CrMo is selected, 4 pieces of continuous forging, the weight of the steel ingot is 18.9t, and the surface temperature of the steel ingot is 650 °C.

[0080] (2) Heating:

[0081] a. The hot steel ingot is heated to 650°C with the maximum power and kept for 2 hours.

[0082] b. The hot steel ingot is heated to 850°C with the maximum power and kept for 2 hours.

[0083] c. The hot steel ingot is heated to 1250°C according to the maximum power and kept for 5 hours.

[0084] (3) Forging:

[0085] a. Wrong nozzle and riser: The wrong nozzle is about 3% of the weight of the steel ingot, and the wrong riser is abou...