Heat treatment of mechanical parts is mainly to improve the mechanical properties of parts, such as hardness, wear resistance and strength, in order to better realize the use value of products. The quotation of heat treatment will vary according to different materials, quantities, heat treatment methods, precision of parts, etc.
In order to regulate the market, ensure the stability of economic order and avoid unfair competition, a price management opinion for the heat treatment industry was formulated. This opinion is widely used in the quotation of heat treatment of small parts and is an important basis for the quotation of heat treatment of small parts.
1、 Processing cost of heat treatment
The processing cost of heat treatment mainly consists of basic power consumption, auxiliary materials, labor costs and other factors. In the heat treatment process, the basic power consumption and basic industrial power consumption are taken as the cardinal number, and are calculated according to the characteristics of various heat treatment processes and implementation conditions. The calculation formula needs to refer to the comprehensive evaluation index system and management of heat treatment industry:
Basic power consumption = standard industrial power consumption * conversion process coefficient * heating mode coefficient * production mode coefficient * industrial material coefficient * loading coefficient
2、 Quotation of processing technology content
The processed technology was known by the Han Dynasty as the technological level or technical level of the processed parts. The technical level is often divided into three levels: high, intermediate and low.
Advanced: it mainly adopts important parts such as tools and dies, spindles and guide rails processed by vacuum or laser, with a coefficient of 1.5.
Intermediate: various mechanical parts of controllable atmosphere heat treatment, ion nitriding, gas nitriding, soft nitriding, high and medium frequency, with a coefficient of 1.2.
Low level: quenching and tempering, normalizing, annealing, well type furnace carburization, salt bath furnace quenching, etc. of general equipment, with a coefficient of 1.0.
3、 Guide price for quotation of heat treatment of small parts
1. Annealing class
(1) High temperature annealing: 1.0-2.0 yuan
(2) Complete annealing, spheroidizing annealing, isothermal annealing: 1.0-2.5 yuan
(3) Recrystallization annealing, high temperature tempering, artificial aging: 0.4-1.4 yuan
(4) Bright annealing and packing annealing: 1.2-2.5 yuan
2. Normalizing class
(1) Box furnace normalizing: 0.8-1.5 yuan
(2) Well furnace normalizing: 1.0-2.0 yuan
(3) Salt bath normalizing: 1.4-2.0 yuan
3. Conditioning class
(1) Box furnace and trolley furnace (less than 950 ℃): 1.0-2.5 yuan
(2) Box furnace and trolley furnace (more than 950 ℃): 1.5-5 yuan
(3) Mold and high alloy steel: 3-6 yuan
4. Salt bath furnace quenching (salt bath, alkali bath cooling plus 30%)
(1) Carbon steel and low alloy steel parts: 2-4.5 yuan
(2) High alloy steel (mold, etc.): 2.7-6 yuan
(3) High speed steel (three times tempering and cleaning): 8-20 yuan
(4) High alloy steel: 5-8 yuan
5. Protective quenching
(1) Controllable atmosphere furnace heating: 3-4 yuan
(2) Well cementation furnace protection heating: 1.5-3.3 yuan
The above are some common quotation methods for heat treatment of small parts. In the process of heat treatment, the quotation personnel need to select the quotation method according to the specific information of the product and the process used in the treatment, so as to ensure the accuracy of the quotation.