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Plastic pattern provides the workmanship of the spare parts and heat treatment t
From;    Author:Stand originally

Choose different breed rolled steel to make plastic pattern, its chemistry composition and mechanical function each are not identical, workmanship line is accordingly diverse; Same, the heat treatment technology that does not provide steel to use with type plastic pattern also is different. This section basically introduces the characteristic of the workmanship course of plastic mould and heat treatment craft.

One, the workmanship course of plastic mould

1. mild steel and low carbon alloy steel make a pattern

For example, 20, 20Cr, the craft course of the steel such as 20CrMnTi is: Next makings → forging → of anneal of modular base → is mechanical rough machining → is cold → of anneal of extrusion → recrystallization is mechanical → of cementite of finish machining → quenchs, → of temper → abrade polish is assembled.

Patternmaking of steel of cementite of 2. tall alloy is provided

For example 12CrNi3A, the craft course of 12CrNi4A steel is: Next makings → forging normalizing of modular base → and → of high temperature temper is mechanical → of cementite of finish machining → of → of temper of high temperature of rough machining → quenchs, abrade polish → assembles temper → .

3. moves qualitative steeliness pattern

For example, 45, the craft course of the steel such as 40Cr is: Next makings → forging rough machining → moves machine of → of anneal of modular base → → of nap of finish machining → , polish assembles qualitative → machine.

Steel of tool of 4. carbon element and patternmaking of alloy tool steel are provided

For example T7A ~ T10A, crWMn, the craft course of the steel such as 9SiCr is: Next makings → forge turn anneal → machine into ball of modular base → rough machining → goes → of semifinishing machining of machinery of stress anneal → is mechanical finish machining → quenchs, → of temper → abrade polish is assembled.

5. beforehand hard steeliness mould

For example 5NiSiCa, 3Cr2Mo (P20) wait for steel. Machine to using a club to expect directly, because offerred money status to already undertook beforehand sclerotic processing, the polish after can machining figuration directly, assemble. Of figuration of the rework after becoming preform to wanting to change forge, its craft course is: Next makings → change forge → ball to turn anneal → dig or mill 6 → beforehand hard processing (34 ~ 42HRC) rough machining → goes to → machinery → of polish of finish machining → assembles machine of stress anneal → .

2, the heat treatment characteristic of plastic mould

(one) the heat treatment characteristic of cementite steel plastic pattern

1. is tall to having hardness, tall wearability and the plastic mould that tall tenacity asks, want to choose cementite steel to make, and cementite, quench with microtherm temper serves as final heat treatment.
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