模具钢断裂方法有哪些。模具钢适用范围广。原材料存在严重的碳化物偏析，淬火工件未及时回火和回火不充分，存在过大的残余内应力和线切割过程中形成的新内应力叠加导致线切割裂纹。那么，模具钢断裂方法有哪些呢？今天七和模具就跟大家聊一聊。

What are the methods to solve the fracture of die steel. Die steel has a wide range of applications. There is serious carbide segregation in raw materials, the quenched workpiece is not tempered in time and the tempering is not sufficient, and there is the superposition of excessive residual internal stress and new internal stress formed in the process of wire cutting, resulting in wire cutting cracks. So, what are the methods to solve the fracture of die steel? Today, Qihe mould will talk to you.

1、对原材料进行改锻，多次双十字形变向镦拔锻造，经四镦四拔，使锻造纤维组织围绕型腔或轴线呈波浪形对称分布，并利用一火高温余热进行淬火，接着高温回火

1. The raw materials shall be re forged, and the double cross direction change upsetting and drawing forging shall be carried out for many times. After four upsetting and four drawing, the forged fiber structure shall be distributed symmetrically in wavy shape around the cavity or axis, and quenched with one fire high-temperature waste heat, followed by high-temperature tempering

2、制订的热处理工艺，控制淬火残余奥氏体含量不超标

2. Formulate advanced heat treatment process to control the content of quenched residual austenite not exceeding the standard

3、淬火后及时进行回火、淬火应力

3. Tempering shall be carried out in time after quenching to eliminate quenching stress

4、适当降低磨削速度、磨削量，磨削冷却速度，能有效防止和避免磨削裂纹形成

4. Properly reducing the grinding speed, grinding amount and grinding cooling speed can effectively prevent and avoid the formation of grinding cracks

塑料模具钢的选用

Selection of plastic die steel

薄壁的塑料箱体，生产批量在小于10万件时，用P20，P21预硬态(HB250～300)，腐蚀性较强时用414L。

For thin-walled plastic boxes, when the production batch is less than 100000 pieces, P20 and p21 are used for pre hardening (hb250 ~ 300), and 414l is used for strong corrosion.

高寿命的普通塑料模，用P6或P20，经渗碳一淬火后硬度在HRC54-58;塑料件不太大时，可用O1，S7。腐蚀性较强时用420。

High life ordinary plastic mold, P6 or P20, after carburizing and quenching, the hardness is hrc54-58; When the plastic part is not too large, O1 and S7 can be used. 420 for strong corrosivity.

非高温的热固性模用P6，P20经渗碳淬火后使用。腐蚀性强用420。

P6 and P20 for non high temperature thermosetting die are used after carburizing and quenching. Highly corrosive 420.

高温热固性塑料模用H13和S7或渗碳钢P4。这些含铬较高有好的抗回火性和抗高温氧化性。

H13 and S7 or carburized steel P4 for high temperature thermosetting plastic molding. These high chromium have good tempering resistance and high temperature oxidation resistance.

模具钢断裂方法有哪些。模具钢是工业中应用广，在处理模具钢中可能会出现断裂情况。以上方法可以作为参考。希望对大家有所帮助

What are the methods to solve the fracture of die steel. Die steel is widely used in industry. Fracture may occur in the treatment of die steel. The above methods can be used as a reference. Hope to help you